1 #include<stdio.h> 2 3 int main() 4 { 5 long long m , n; 6 int t = 1 ; 7 while(scanf("%lld%lld",&m,&n) && m && n) 8 { 9 printf("Case %d: %lld ",t , m*n*(m-1)*(n-1)/4) ; 10 t++; 11 } 12 return 0 ; 13 }
参考：http://cnblogs.com/xiaocai905767378/archive/2011/04/27/2030213.html