Many Littles Make a Mickle

The first line is a positive integer $T\ (1 \le T \le 100)$ , indicating that there are $T$ test data.

Next, there are $T$ lines. Each line has two positive integers $N$ and $M\ (1 \le N,M \le 100)$ , indicating the number of floors of the tower and the number of people that can be accommodated in each room in a test data.

C++(clang++ 11.0.1) 解法, 执行用时: 3ms, 内存消耗: 432K, 提交时间: 2022-10-07 20:33:21

#include<iostream>
using namespace std;
int main(){
	int t;cin>>t;
	while(t--){
		int n,m;cin>>n>>m;
		cout<<n*(n+1)*(2*n+1)/6*m<<endl;
	}
}

pypy3 解法, 执行用时: 72ms, 内存消耗: 21540K, 提交时间: 2022-10-22 19:08:43

for text in range(int(input())):
    n,m=map(int,input().split())
    print(sum(i*i for i in range(1,n+1))*m)

Python3 解法, 执行用时: 40ms, 内存消耗: 4528K, 提交时间: 2022-10-22 09:19:44

t=int(input())
while t:
    t=t-1
    n,m=map(int,input().split())
    print(n*(n+1)*(2*n+1)*m//6)

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