Submission #2795122

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Source Code Expand

#include <iostream>

using namespace std;

int main()
{
	int n, a, b;
	int k, p[100];
	int ba[101] = {0};
	
	cin >> n >> a >> b >> k;
	
	for (int i = 0; i < k; i++) {
		cin >> p[i];
		ba[p[i]]++;
	}
	
	for (int i = 1; i < 101; i++) {
		if (ba[i] > 1) {
			cout << "NO" << endl;
			return (0);
		}
		if (ba[a] > 0 || ba[b] > 0) {
			cout << "NO" << endl;
			return (0);
		}
	}
	
	cout << "YES" << endl;
	
	return (0);
}

Submission Info

Judge Result