题目链接：http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2533
P105
#include<stdio.h>
#include<queue>
#include<string.h>
#include<iostream>
using namespace std;
#define ll long long
int main(){
ll n, m;
while(cin>>n>>m, n+m){
if(n>m)swap(n,m);
cout<<n*m*(n+m-2)+2*n*(n-1)*(3*m-n-1)/3<<endl;
}
return 0;
}
原文：http://blog.csdn.net/acmmmm/article/details/19826739