#include <stdio.h>
int path (int x, int y){
if (x==0||y==0||(x==0&&y==0)){
return 1;
}
return path(x-1,y)+path(x,y-1);
}
int main(void) {
int x,y;
int path(x,y);
// your code goes here
return 0;
}
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