Moved kattis from Uni repo

kattis/problems/01_11_23/weakvertices/main.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define MAX 21
+
+int main(int argc, char **argv) {
+  int n;
+  scanf("%d", &n);
+  int matrix[MAX][MAX];
+  int i, j, k;
+  while (n != -1) {
+    for (i = 0; i < n; i++) {
+      for (j = 0; j < n; j++) {
+        scanf("%d", &matrix[i][j]);
+      }
+    }
+    int weak[MAX];
+    for (i = 0; i < n; i++) {
+      weak[i] = 1;
+    }
+    for (i = 0; i < n; i++) {
+      for (j = 0; j < n; j++) {
+        for (k = 0; k < n; k++) {
+          if (matrix[i][j] && matrix[j][k] && matrix[k][i]) {
+            weak[i] = 0;
+            weak[j] = 0;
+            weak[k] = 0;
+          }
+        }
+      }
+    }
+    for (i = 0; i < n; i++) {
+      if (weak[i]) {
+        printf("%d ", i);
+      }
+    }
+    printf("\n");
+    scanf("%d", &n);
+  }
+}