advent2019

commit e6a73e442a2aebf2e03a46d10a4652e9c9349a15
parent 0f399070214f191e048087d97bd821753d3e7e26
Author: bsandro <email@bsandro.tech>
Date:   Fri, 26 Dec 2025 17:20:10 +0200

day04 p2

Diffstat:
M
day04.c
 | 
20
+++++++++++++-------

1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/day04.c b/day04.c
@@ -25,23 +25,29 @@ int main(void) {
     int ifrom = btoi(from);
     int ito = btoi(to);
     int p1 = 0;
+    int p2 = 0;
     char str[7];
     for (int i=ifrom;i<=ito;++i) {
         sprintf(str, "%d", i);
-        bool ok = false;
+        bool ok1 = false;
+        bool ok2 = false;
         for (int j=1;j<6;++j) {
             if (str[j]<str[j-1]) {
-                ok = false;
+                ok1 = false;
                 break;
             }
-            if (str[j]==str[j-1]) ok = true;
+            if (str[j]==str[j-1]) {
+                ok1 = true;
+                if (!ok2 && !((j>1&&str[j-1]==str[j-2]) || (j<5&&str[j]==str[j+1]))) {
+                    ok2 = true;
+                }
+            }
         }
-        if (ok) {
+        if (ok1) {
             p1++;
+            if (ok2) { p2++; }
         }
     }
-    printf("p1: %d\n", p1);
+    printf("p1: %d\np2: %d\n", p1, p2);
     return 0;
 }
-// 186750 too high
-// 1777 too high