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mjk

[C++] 纯文本查看 复制代码

#include <bits/stdc++.h>
using namespace std;
int t,n;
int main(){
    cin>>t;
    while(t--){
        cin>>n;
        if(n%2==0)    cout<<n*(n+2)*(2*n+1)/8<<endl;
        else    cout<<(n+1)*(2*n*n+3*n-1)/8<<endl;
    }
}