Submission #1592041

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;

const int MAX_N = 100005;
int p[MAX_N];

int main() {
  int N;
  scanf("%d", &N);
  for (int i = 1; i <= N; ++i)
    scanf("%d", &p[i]);
  int res = 0;
  for (int i = 1; i <= N; ++i)
    if (p[i] == i) {
      int j = i;
      while (p[j] == j && j <= N) j++;
      res += (j - i + 1) / 2;
      i = j - 1;
    }
  printf("%d\n", res);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &N);
                  ^
./Main.cpp:13:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &p[i]);
                       ^

Judge Result