Submission #3421897

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Source Code Expand

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

int main(){
  set<int> c;
  int n;
  cin>>n;
  int a,b;
  cin>>a>>b;
  c.insert(a);
  c.insert(b);
  int k;
  cin>>k;
  for(int i=0;i<k;i++){
    cin>>a;
    c.insert(a);
  }
  cout<<(c.size()==k+2?"YES":"NO")<<endl;
}

Submission Info

Judge Result