[알고리즘] 백준 5724 - 파인만 (C++)

[문제 링크] : https://www.acmicpc.net/problem/5724

#include <iostream>
using namespace std;

int main(){
    int N;
    while(true){
        int Ans = 0;
        cin >> N;
        if(N == 0){
            break;
        }

        Ans += N * N + 1;
        for(int i=2; i<=N-1; i++){
            Ans += i * i;
        }
        if(N != 1){
            cout << Ans << "\n";
        }
        else{
            cout << 1 << "\n";
        }
    }
    return 0;
}