Moved kattis from Uni repo

kattis/problems/11_11_23/flatbokuveisla/main.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+  int n, m;
+  scanf("%d %d", &n, &m);
+
+  printf("%d\n", n - (n/m)*m );
+  return 0;
+}