advent2025

commit d3c3c271117600cc8eb596e19b3861038eedc2a1
parent cecf432033db713a52a859d70aef35bc33ec6d51
Author: bsandro <email@bsandro.tech>
Date:   Mon,  1 Dec 2025 07:56:58 +0200

day 01

Diffstat:
A
day01.c
 | 
31
+++++++++++++++++++++++++++++++

1 file changed, 31 insertions(+), 0 deletions(-)
diff --git a/day01.c b/day01.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+#define BUF_SIZE 32
+
+int main(void) {
+    char buf[BUF_SIZE];
+    int cur = 50;
+    int p1 = 0;
+    int p2 = 0;
+    while (fgets(buf, sizeof(buf), stdin)) {
+        char dir;
+        int cnt;
+        sscanf(buf, "%c%d", &dir, &cnt);
+        if (cnt>99) p2+=cnt/100;
+        cnt = cnt%100;
+        if (dir=='L') {
+            if (cur&&cnt>cur) p2++;
+            cur-=cnt;
+            if (cur<0) cur=100+cur;
+        } else if (dir=='R') {
+            if (cur+cnt>100) p2++;
+            cur+=cnt;
+            if (cur>99) cur=cur-100;
+        }
+        if (cur==0) { p1++; p2++; }
+    }
+    printf("p1: %d\n", p1);
+    printf("p2: %d\n", p2);
+    return 0;
+}
+// 6392