B4410 [GESP202509 一级] 金字塔 题解

Dijkstra_zyl · 2025-10-01 14:12:59 · 题解

B4410 [GESP202509 一级] 金字塔 题解

Code:

#include <bits/stdc++.h>
#define int long long
signed main(){
    int n,ans = 0; std::cin >> n;
    for(int i = n;i >= 1;i--) ans += i*i;//枚举 
    std::cout << ans;
    return 0;
}