diff --git a/16/src/main.rs b/16/src/main.rs
index 6c8348b..4f80ef3 100644
--- a/16/src/main.rs
+++ b/16/src/main.rs
@@ -1,9 +1,104 @@
-fn addi(first: i32, second: i32) -> i32 {
-    return first + second;
+fn addi(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] + second;
+    return regs;
+}
+
+fn addr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] + regs[second];
+    return regs;
+}
+
+fn muli(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] * second;
+    return regs;
+}
+
+fn mulr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] * regs[second];
+    return regs;
+}
+
+fn bori(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] | second;
+    return regs;
+}
+
+fn borr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] | regs[second];
+    return regs;
+}
+
+fn seti(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] =  first;
+    return regs;
+}
+
+fn setr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first];
+    return regs;
+}
+
+fn gtir(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = if first > regs[second] {1} else {0};
+    return regs;
+}
+
+fn gtri(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = if regs[first] > second {1} else {0};
+    return regs;
+}
+
+fn gtrr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = if regs[first] > regs[second] {1} else {0};
+    return regs;
+}
+
+fn eqir(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = if first == regs[second] {1} else {0};
+    return regs;
+}
+
+fn eqri(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = if regs[first] == second {1} else {0};
+    return regs;
+}
+
+fn eqrr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = if regs[first] == regs[second] {1} else {0};
+    return regs;
+}
+
+fn bani(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = regs[first] & second;
+    return regs;
+}
+
+fn banr(first: usize, second: usize, address: usize, registers: &Vec<usize>) -> Vec<usize> {
+    let mut regs = registers.clone();
+    regs[address] = first & regs[second];
+    return regs;
 }
 
 fn main() {
-    println!("Hello, world!");
-    let a: fn(i32, i32) -> i32 = addi;
-    println!("{}", a(1, 2));
+    let functions = [addi, addr, muli, mulr, seti, setr, bani, banr, bori, borr, gtir, gtri, gtrr, eqir, eqri, eqrr];
+    println!("{}", functions.len());
+    let input = vec![1, 2, 3, 4];
+    for func in functions.iter() {
+        println!("{}", func(1, 2, 3, &input)[3]);
+    }
 }