From e1dfce35e0279d0732aae77ceffb2f661b3f59af Mon Sep 17 00:00:00 2001
From: attila <daf276@gmx.de>
Date: Sat, 1 Dec 2018 18:09:24 +0100
Subject: [PATCH] Day 1 done

---
 .gitignore                        |   1 +
 day1/.idea/codeStyles/Project.xml |  29 ++++
 day1/.idea/day1.iml               |  14 ++
 day1/.idea/misc.xml               |  12 ++
 day1/.idea/modules.xml            |   8 ++
 day1/.idea/vcs.xml                |   6 +
 day1/.idea/workspace.xml          | 211 ++++++++++++++++++++++++++++++
 day1/Cargo.lock                   |   4 +
 day1/Cargo.toml                   |   6 +
 day1/src/main.rs                  |  73 +++++++++++
 10 files changed, 364 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 day1/.idea/codeStyles/Project.xml
 create mode 100644 day1/.idea/day1.iml
 create mode 100644 day1/.idea/misc.xml
 create mode 100644 day1/.idea/modules.xml
 create mode 100644 day1/.idea/vcs.xml
 create mode 100644 day1/.idea/workspace.xml
 create mode 100644 day1/Cargo.lock
 create mode 100644 day1/Cargo.toml
 create mode 100644 day1/src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..eb5a316
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+target
diff --git a/day1/.idea/codeStyles/Project.xml b/day1/.idea/codeStyles/Project.xml
new file mode 100644
index 0000000..30aa626
--- /dev/null
+++ b/day1/.idea/codeStyles/Project.xml
@@ -0,0 +1,29 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <Objective-C-extensions>
+      <file>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Macro" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Typedef" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Enum" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Constant" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Global" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Struct" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="FunctionPredecl" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Function" />
+      </file>
+      <class>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Property" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Synthesize" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InitMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="StaticMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InstanceMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="DeallocMethod" />
+      </class>
+      <extensions>
+        <pair source="cpp" header="h" fileNamingConvention="NONE" />
+        <pair source="c" header="h" fileNamingConvention="NONE" />
+      </extensions>
+    </Objective-C-extensions>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/day1/.idea/day1.iml b/day1/.idea/day1.iml
new file mode 100644
index 0000000..b7b4242
--- /dev/null
+++ b/day1/.idea/day1.iml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="CPP_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/examples" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/benches" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/day1/.idea/misc.xml b/day1/.idea/misc.xml
new file mode 100644
index 0000000..5346672
--- /dev/null
+++ b/day1/.idea/misc.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CargoProjects">
+    <cargoProject FILE="$PROJECT_DIR$/Cargo.toml" />
+  </component>
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+  <component name="RustProjectSettings">
+    <option name="toolchainHomeDirectory" value="$USER_HOME$/.cargo/bin" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/day1/.idea/modules.xml b/day1/.idea/modules.xml
new file mode 100644
index 0000000..94cf58a
--- /dev/null
+++ b/day1/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/day1.iml" filepath="$PROJECT_DIR$/.idea/day1.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/day1/.idea/vcs.xml b/day1/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/day1/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/day1/.idea/workspace.xml b/day1/.idea/workspace.xml
new file mode 100644
index 0000000..7add1cb
--- /dev/null
+++ b/day1/.idea/workspace.xml
@@ -0,0 +1,211 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakeRunConfigurationManager" shouldGenerate="true" shouldDeleteObsolete="true" buildAllGenerated="false">
+    <generated />
+  </component>
+  <component name="CMakeSettings">
+    <configurations>
+      <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
+    </configurations>
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="4fa19ef7-5edf-4cf5-80c5-1dace056e2f6" name="Default Changelist" comment="" />
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FUSProjectUsageTrigger">
+    <session id="770093350">
+      <usages-collector id="statistics.lifecycle.project">
+        <counts>
+          <entry key="project.open.time.0" value="1" />
+          <entry key="project.opened" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.extensions.open">
+        <counts>
+          <entry key="rs" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.open">
+        <counts>
+          <entry key="Rust" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.extensions.edit">
+        <counts>
+          <entry key="rs" value="694" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.edit">
+        <counts>
+          <entry key="Rust" value="694" />
+        </counts>
+      </usages-collector>
+    </session>
+  </component>
+  <component name="FileEditorManager">
+    <leaf>
+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/src/main.rs">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="492">
+              <caret line="72" column="1" lean-forward="true" selection-start-line="72" selection-start-column="1" selection-end-line="72" selection-end-column="1" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+    </leaf>
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
+  </component>
+  <component name="IdeDocumentHistory">
+    <option name="CHANGED_PATHS">
+      <list>
+        <option value="$PROJECT_DIR$/src/main.rs" />
+      </list>
+    </option>
+  </component>
+  <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsGulpfileManager">
+    <detection-done>true</detection-done>
+    <sorting>DEFINITION_ORDER</sorting>
+  </component>
+  <component name="ProjectFrameBounds">
+    <option name="x" value="-1" />
+    <option name="y" value="-22" />
+    <option name="width" value="1922" />
+    <option name="height" value="1068" />
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
+  <component name="ProjectView">
+    <navigator proportions="" version="1">
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="Scope" />
+      <pane id="ProjectPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="day1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="day1" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="day1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="day1" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
+    </panes>
+  </component>
+  <component name="PropertiesComponent">
+    <property name="WebServerToolWindowFactoryState" value="false" />
+    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
+    <property name="nodejs_npm_path_reset_for_default_project" value="true" />
+    <property name="org.rust.cargo.project.model.PROJECT_DISCOVERY" value="true" />
+    <property name="settings.editor.selected.configurable" value="reference.settingsdialog.IDE.editor.colors" />
+  </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="RunManager" selected="Cargo Command.Release">
+    <configuration name="Release" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+      <option name="channel" value="DEFAULT" />
+      <option name="command" value="run --release" />
+      <option name="allFeatures" value="false" />
+      <option name="nocapture" value="false" />
+      <option name="backtrace" value="SHORT" />
+      <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+      <envs />
+      <method v="2" />
+    </configuration>
+    <configuration name="Unnamed" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+      <option name="channel" value="DEFAULT" />
+      <option name="command" value="run" />
+      <option name="allFeatures" value="false" />
+      <option name="nocapture" value="false" />
+      <option name="backtrace" value="SHORT" />
+      <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+      <envs />
+      <method v="2" />
+    </configuration>
+    <list>
+      <item itemvalue="Cargo Command.Unnamed" />
+      <item itemvalue="Cargo Command.Release" />
+    </list>
+  </component>
+  <component name="SvnConfiguration">
+    <configuration />
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="4fa19ef7-5edf-4cf5-80c5-1dace056e2f6" name="Default Changelist" comment="" />
+      <created>1543681202606</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1543681202606</updated>
+      <workItem from="1543681203734" duration="2785000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TimeTrackingManager">
+    <option name="totallyTimeSpent" value="2785000" />
+  </component>
+  <component name="ToolWindowManager">
+    <frame x="-1" y="-22" width="1922" height="1068" extended-state="0" />
+    <editor active="true" />
+    <layout>
+      <window_info id="Favorites" side_tool="true" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.2497332" />
+      <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
+      <window_info anchor="bottom" id="Database Changes" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Version Control" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Terminal" />
+      <window_info anchor="bottom" id="Event Log" side_tool="true" />
+      <window_info anchor="bottom" id="Message" order="0" />
+      <window_info anchor="bottom" id="Find" order="1" />
+      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.32910052" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
+      <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
+      <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
+      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info anchor="right" id="Cargo" />
+      <window_info anchor="right" id="Database" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
+    </layout>
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="1" />
+  </component>
+  <component name="VcsContentAnnotationSettings">
+    <option name="myLimit" value="2678400000" />
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/src/main.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="492">
+          <caret line="72" column="1" lean-forward="true" selection-start-line="72" selection-start-column="1" selection-end-line="72" selection-end-column="1" />
+        </state>
+      </provider>
+    </entry>
+  </component>
+</project>
\ No newline at end of file
diff --git a/day1/Cargo.lock b/day1/Cargo.lock
new file mode 100644
index 0000000..7441fae
--- /dev/null
+++ b/day1/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "day1"
+version = "0.1.0"
+
diff --git a/day1/Cargo.toml b/day1/Cargo.toml
new file mode 100644
index 0000000..8f6f463
--- /dev/null
+++ b/day1/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "day1"
+version = "0.1.0"
+authors = ["attila <daf276@gmx.de>"]
+
+[dependencies]
diff --git a/day1/src/main.rs b/day1/src/main.rs
new file mode 100644
index 0000000..630796b
--- /dev/null
+++ b/day1/src/main.rs
@@ -0,0 +1,73 @@
+use std::collections::HashSet;
+
+fn main() {
+    let change_in_frequencies: Vec<i32> = "-19,+8,-10,+9,+2,+19,+5,+8,+13,+16,+4,-8,+16,-10,+11,+13,-12,-5,\
+    -15,-12,+9,-6,-18,+5,+3,+18,-3,+5,-19,+21,-9,-9,+20,-18,+11,+11,+17,+17,-20,-7,+5,+7,+7,+7,+7,\
+    +16,-12,+18,+10,+3,+15,-10,+8,+5,+7,-16,-16,-2,-15,+3,-6,+9,-15,+19,-12,-20,-1,-12,+11,-22,+10,\
+    +15,+2,-10,-19,+1,-18,-21,-4,+16,-15,+13,+20,+7,+23,+13,-3,+10,+8,-7,+4,-19,-7,-4,+19,+20,-18,\
+    -5,+11,+22,-14,+15,-3,+16,+20,-16,-11,-12,+7,-13,+7,+12,+20,+9,-15,+1,-14,+11,+16,+13,+9,-16,\
+    +18,-8,-6,+17,+7,+15,+7,-15,-15,-14,-16,+15,+17,+19,+6,-16,+13,-12,+20,-18,-11,-8,-14,+18,-11,\
+    +6,-16,+14,-10,-6,+1,+16,+4,-6,-8,+27,+18,+10,-3,-2,+11,-10,+11,+7,+19,-1,+11,+14,-16,-10,+15,\
+    -9,+2,-1,+13,-4,+6,-9,+10,-2,-10,+17,-14,-10,+15,+17,-12,-15,+18,+8,+13,+3,+17,+14,+1,+15,+18,\
+    +7,+15,-2,+9,+3,-1,-18,-15,-11,-10,-1,-14,+13,-18,-2,+5,+5,-7,-5,-12,+4,+19,+15,+9,-17,-10,-5,\
+    +13,+15,+7,-10,+12,+1,+9,-18,+14,+20,+2,+5,+7,+6,+13,+4,+12,-9,+17,+10,-5,-9,+18,+4,+5,-16,+1,\
+    +16,+1,-5,+19,-5,+14,-15,-3,+7,-15,+14,-7,+16,+13,+1,+17,-4,-9,+12,+15,+10,+5,+8,+31,+22,+12,\
+    +16,-17,+9,-21,-13,+22,-1,-2,+17,+14,+34,+18,-15,+10,+14,+11,+4,-9,+13,-12,+7,+3,-15,+6,+5,+21,\
+    -18,-20,+7,+18,-11,+8,-9,+11,-19,-2,-2,-20,-13,+16,-14,-1,+4,+20,-10,+6,-18,+15,+41,-1,+25,+21,\
+    +15,+1,-14,-1,-11,+17,-9,-5,-1,+21,-2,+9,+3,-13,-16,+1,+13,-4,-18,-8,-20,-1,+2,+1,+4,-8,-46,-29,\
+    -16,-5,-36,+35,-144,+3,+2,-7,-1,-11,-20,-22,-12,-18,-2,-18,+8,-18,+3,-1,+7,-18,+7,+19,-12,-19,\
+    -19,-14,+15,+15,+6,-17,+12,+11,+24,+16,+4,+12,+4,-18,+3,+19,-10,+12,-4,+19,+3,+2,+5,+19,+5,+22,\
+    -21,+1,-21,-19,+13,-12,+10,-12,-13,-2,-11,-16,-7,+10,-21,-3,+4,+22,+18,+11,+1,-10,+15,+5,-9,+2,\
+    +1,-24,-1,-2,+6,-26,-15,-16,+9,+25,+14,-7,-27,-24,+16,-30,-30,+26,+12,+3,-32,+3,-10,-4,+8,-19,\
+    -7,+15,+13,-3,+16,+7,-21,-23,-12,+14,-149,-77,+19,+6,-80,+11,-16,-19,-65,+6,-67327,-14,+16,-15,\
+    -10,+4,+16,-12,-3,-10,+7,+14,-2,+17,+8,-7,+15,-17,-13,-11,-18,+19,-22,-11,-1,-16,-2,+10,-12,-6,\
+    +11,+9,+1,+13,+9,-6,+19,-10,-4,-12,+14,+1,+19,+15,+8,-16,+1,+8,+18,-12,-5,+10,+15,-9,-15,+12,+8,\
+    -9,+3,+16,+5,+14,+18,-1,-5,+4,+17,+12,-9,-12,-15,+11,-19,+1,-13,+17,-11,-11,-14,+8,+10,-15,+18,\
+    -12,+4,-1,+10,+16,+11,+3,-11,-14,-4,+17,+13,+4,+12,-18,-16,-20,+14,-22,-20,-20,+6,+16,-15,-35,\
+    -7,-17,-20,+19,-17,-11,-9,-16,-3,+7,-10,-2,+7,+2,+2,+16,+14,+17,-8,-18,+2,-6,+3,-10,-8,+7,+5,\
+    +18,-20,-13,-17,-17,-7,+9,+13,-17,+16,+4,+12,-3,+1,-12,-7,+16,+13,+1,+14,-3,-4,+16,-21,-20,-17,\
+    +1,-14,-10,-5,-14,-1,-5,+19,+3,+16,-9,-13,+2,+3,-7,-15,+4,+6,+8,-10,+5,+12,+8,+18,-7,+8,-15,+5,\
+    -11,-15,+16,+16,+7,-2,+14,+18,+24,+9,+19,+17,+13,-16,-13,-14,-20,-5,+18,-3,+20,+13,+15,+7,+11,\
+    -15,-22,-15,-6,+18,-8,+18,-6,-24,-12,+21,+17,+18,+40,+22,+27,-4,-16,+17,-10,-18,+49,+15,-12,+7,\
+    +13,-16,+10,+15,-1,-3,+16,+6,-7,+4,-18,+13,-4,-16,+18,-5,+1,+9,-4,-2,+19,+17,-4,-14,-24,-21,+1,\
+    +6,-18,+8,+15,-18,-2,-31,-30,+4,+2,-28,-53,-33,+10,-11,-18,-19,-4,-6,-24,-6,-4,+11,-24,-16,+3,\
+    -1,-1,+13,-15,-10,-7,-3,+8,-11,+2,+5,+8,-3,-7,+15,+1,-11,-11,-2,-4,+16,+5,+14,-24,-14,-22,-11,\
+    -15,-6,+8,+15,+19,-14,-12,+1,+9,+5,+18,+6,-18,+16,-8,-10,-8,-9,+1,+11,-16,+8,+18,+12,+8,+2,+10,\
+    +11,-2,+14,+1,+11,-9,-18,-24,+2,-8,+15,-14,-18,+11,+2,-10,-11,-5,-13,-3,-12,-5,-13,+16,+5,-19,\
+    -16,-12,-4,+10,-15,+14,-6,+3,-18,+17,+12,-2,+6,+13,+16,-11,+3,+3,-20,-6,+8,-9,-19,-3,+16,-14,\
+    -14,+1,-12,-10,+19,-12,-18,+5,-3,+7,-20,-16,-18,+17,-23,+25,+65,+11,+11,+16,-1,+16,-9,+19,+13,\
+    -8,-10,+9,-18,-16,-16,-19,+1,-28,+4,+35,+13,+12,+15,-5,-3,+4,+16,+2,+10,+15,+17,+18,+27,+19,+15,\
+    +13,+6,-17,+12,+15,+9,+23,+78,-221,-28,+19,+18,-13,-22,-11,-5,-5,-9,-16,-2,+11,+30,+10,+28,-4,\
+    -72,-36,+10,-5,+77,+35,+102,+153,-29,-676,-67225,-5,+13,+19,+3,+15,+7,-11,-1,-7,+13,+17,+17,+6,\
+    -15,-9,+11,-8,-7,+10,+1,+13,+19,-11,-11,+2,+4,-11,-7,+10,+19,+17,+7,+12,+20,-2,+135638".split(",").map(|s| s.parse().unwrap()).collect();
+
+    println!("Frequency after changes: {}", get_frequency_after_changes(&change_in_frequencies));
+
+    println!("First repeated frequency: {}", get_first_repeated_frequency(&change_in_frequencies));
+}
+
+fn get_frequency_after_changes(change_in_frequencies: &Vec<i32>) -> i32 {
+    change_in_frequencies.iter().sum()
+}
+
+fn get_first_repeated_frequency(change_in_frequencies: &Vec<i32>) -> i32 {
+    let mut frequency = 0;
+    let repeated_frequency;
+
+    let mut visited_frequencies = HashSet::new();
+
+    'outer: loop {
+        'inner: for change in change_in_frequencies {
+            frequency += change;
+
+            if !visited_frequencies.contains(&frequency) {
+                visited_frequencies.insert(frequency);
+            } else {
+                repeated_frequency = frequency;
+                break 'outer;
+            }
+        }
+    }
+
+    repeated_frequency
+}
\ No newline at end of file