24 lines
424 B
C++
24 lines
424 B
C++
#include<stdio.h>
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#define MAXN 2000+10
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int a[MAXN][MAXN]={0};
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int main()
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{
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int T,i,j;
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for(i=0;i<MAXN;i++)
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{
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a[i][i]=1;
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a[i][1]=i%1007;
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}
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for(i=2;i<MAXN;i++)
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for(j=1;j<i;j++)
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a[i][j]=(a[i-1][j-1]+a[i-1][j])%1007;
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scanf("%d",&T);
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while(T--)
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{
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int m,n;
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scanf("%d%d",&m,&n);
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printf("%d\n",a[n+1][m+1]);
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}
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return 0;
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}
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