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wa了n久,不懂为什么#include <iostream>
using namespace std;
int main()
{
__int64 a,b;
while(scanf("%I64d%I64d",&a,&b))
{
if(a == 0&&b == 0)
break;
__int64 i,t = a+b;
__int64 sum =1;
if(a > b)
a = b;
for(i = t;i > t-a;i--)
sum *= i;
for(i = 2;i <= a;i++)
sum /= i;
printf("%I64d\n",sum);
}
return 0;
}
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