Submission #3017956

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

int main() {
  
  int n;
  scanf("%d", &n);

  vector<int> a(n + 1);
  a[0] = 0;

  for(int i = 1; i < n + 1; i++){
    scanf("%d", &a[i]);
  }

  int now;
  now = 1;

  int count;
  count = 1;

  while(a[now] != 2){
    now = a[now];
    count++;

    if(count > n){
      cout << -1 << endl;
      exit(0);
    }
  } 

  cout << count << endl;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:18: 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", &a[i]);
                       ^

Judge Result