(C) day 3 part 1: non-deterministic WIP :thonking:

03/day3.c

@@ -0,0 +1,78 @@
+#include <stdio.h>
+#define SIZE 1000
+
+struct Claim {
+    int left;
+    int top;
+    int width;
+    int height;
+    int id;
+};
+
+struct Claim parseClaim(char line[25]) {
+    struct Claim claim;
+    sscanf(line, "#%d @ %d,%d: %dx%d", &claim.id, &claim.left, &claim.top, &claim.width, &claim.height);
+    return claim;
+}
+
+//int totalIncrements = 0;
+
+void setFields(struct Claim claim, int fabric [SIZE][SIZE]) {
+    for (int i=claim.left; i<claim.left+claim.width; i++) {
+        for (int j=claim.top; j<claim.top+claim.height; j++) {
+            fabric[i][j] += 1;
+            // totalIncrements++;
+        }
+    }
+}
+
+/*
+int verifyClaim(struct Claim claim, int fabric [SIZE][SIZE]) {
+    for (int i=claim.left; i<=claim.left+claim.width; i++) {
+        for (int j=claim.top; j<=claim.top+claim.height; j++) {
+            if (fabric[i][j] != 1) {
+                return 0;
+            }
+        }
+    }
+    return 1;
+}
+*/
+
+int countDoubles(int fabric [SIZE][SIZE]) {
+    int sum = 0;
+    for (int i=0; i<SIZE; i++) {
+        for (int j=0; j<SIZE; j++) {
+            if (fabric[i][j] > 1) {
+                sum ++;
+            }
+        }
+    }
+    return sum;
+}
+
+int main() {
+    int fabric [SIZE][SIZE];
+    FILE* input = fopen("input", "r");
+    char line [25];
+    
+    while (fgets(line, sizeof(line), input)) {
+        struct Claim claim = parseClaim(line);
+        setFields(claim, fabric);
+    }
+
+    /*
+    int validClaims;
+    input = fopen("input", "r");
+    while (fgets(line, sizeof(line), input)) {
+        struct Claim claim = parseClaim(line);
+        validClaims += verifyClaim(claim, fabric);
+    }
+    */
+
+
+    printf("%d\n", countDoubles(fabric));
+    // printf("%d\n", totalIncrements);
+    return 0;
+}
+