Submission #6411623

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Source Code Expand

#include<iostream>
using namespace std;

int main(){
    int n, a, b, k;
    cin >> n >> a >> b >> k;
    int p[k + 2];
    p[0] = a;
    for(int i = 1; i < k + 1; i++){
        cin >> p[i];
    }
    p[k + 1] = b;

    int frag = 0;

    for(int i = 0; i < k + 2; i++){
        for(int j = i + 1; j < k + 2; j++){
            if(p[i] == p[j]){
                frag = 1;
                break;
            }
        }
        if(frag == 1){
            break;
        }
    }

    if(frag == 1){
        cout << "NO" << endl;
    }else{
        cout << "YES" << endl;
    }
}

Submission Info

Judge Result