Submission #1771886

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Source Code Expand

#include <cstdio>

int main() {
  int N;
  char S[128];
  scanf("%d %s", &N, S);

  if (N % 2 == 0)
    return !printf("-1\n");

  {
    int oft=2-((N+1)/2)%3;
    for (int i=0; i<N; ++i) {
      if (S[i] != 'a'+oft)
        return !printf("-1\n");

      if (++oft > 2)
        oft -= 3;
    }
  }

  printf("%d\n", (N-1)/2);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %s", &N, S);
                        ^

Judge Result