25 lines
456 B
C++
25 lines
456 B
C++
#include<stdio.h>
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#include<string.h>
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__int64 C(__int64 n, __int64 m)
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{
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__int64 i, j;
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if (m > n/2) m = n - m;
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for (i = 1, j = 1;i <= m; i++)
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{
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j = j * (n + 1 - i) / i;
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}
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return j;
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}
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int main ()
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{
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int i,j,t;
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__int64 k1,k2,k;
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__int64 m,n;
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while(scanf("%I64d%I64d",&n,&m)!=EOF&&n||m)
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{
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t=m>n?n:m;
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printf("%I64d\n",C(m+n,t));
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}
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return 1;
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}
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