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dp........#include<iostream>
#include<cmath>
#include<cstdlib>
#include<string.h>
using namespace std;
int main()
{
int a;
cin>>a;
while(a--)
{
int b,c;
cin>>b>>c;
int d[20][20];
for(int i=0;i<20;i++)
for(int j=0;j<20;j++)
d[i][j]=1;
for(int i=2;i<=c;i++)
for(int j=2;j<=b;j++)
{
if(j<i)
d[j][i]=d[j][i-1];
else
d[j][i]=d[j][i-1]+d[j-i][i];
}
cout<<d[b][c]<<endl;
}
}
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