PROG-T1070: Triangle

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

int main(){

    int nStick;
    scanf("%d", &nStick);
    if(nStick < 3){
        cout << "no";
        return 0;
    }
    int mx = 0;
    int mn = 1e9;
    int secondMn = 1e9;
    for(int i = 1; i <= nStick; ++i){
        int x;
        scanf("%d", &x);
        mx = max(mx, x);
        if(x < mn){
            secondMn = mn;
            mn = x;
        } else if(x < secondMn){
            secondMn = x;
        }
    }
    if(mn + secondMn <= mx){
        cout << "yes";
    } else {
        cout << "no";
    }

    return 0;
}