Submission #2840071

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Source Code Expand

#include <iostream>
#include <vector>
#include <string>
#include <queue>

using namespace std;

bool solve(const vector<int>& a){
	const int N = a.size();
	vector<int> cnt(N+1, 0);
	for(auto& t : a) ++cnt[t];
	for(int c=1;c<=N;c++){
		if(cnt[c]+cnt[c-1] != N) continue;
		int restColor = c - cnt[c-1];
		if(restColor < 0) continue;
		if(cnt[c] > 0){
			if(restColor == 0) continue;
			if(cnt[c] < 2 * restColor) continue;
		}
		return true;
	}
	return false;
}

int main(){
	int N;
	while(cin >> N){
		vector<int> a(N);
		for(auto& t : a) cin >> t;
		cout << (solve(a) ? "Yes" : "No") << endl;
	}
}

Submission Info

Judge Result