Online Judge
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谢子元 • 4年前
#include<iostream>
using namespace std;
int kat(int x,int y)
{
if(x == 1||y == 1)
{
return 1;
}
return kat(x-1,y)+kat(x,y-1);
}
int main()
{
int a,b;
cin >> a >> b;
cout << kat(a,b);
return 0;
}
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