Submission #74272881

---

Source Code Expand

#include <bits/stdc++.h>
#define fastio cin.tie(0)->sync_with_stdio(0)
using namespace std;
using ll = long long;
using pii = pair<ll,ll>;
using db = long double;

int main(){
	fastio;
	int n;cin >> n;
	vector<vector<ll>> arr(n+1,vector<ll>(n+1,-1));
	for (int i=1;i<n;i++){
		for (int j=i+1;j<=n;j++){
			ll a;cin >> a;
			arr[i][j]=a;
		}
	}
	for (int i=1;i<=n;i++){
		for (int j=i+1;j<=n;j++){
			for (int k=j+1;k<=n;k++){
				if (arr[i][j]+arr[j][k]<arr[i][k]){
					cout << "Yes";return 0;
				}
			}
		}
	}cout << "No";
	return 0;
}

Submission Info

Judge Result