#include <stdio.h>
int path (int x, int y){
if (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;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CmludCBwYXRoIChpbnQgeCwgaW50IHkpewogICAgaWYgKHg9PTB8fHk9PTApCnsKICAgIHJldHVybiAxOwogICB9CiAgICByZXR1cm4gcGF0aCh4LTEseSkrcGF0aCh4LHktMSk7Cn0KCgppbnQgbWFpbih2b2lkKSB7CiAgICBpbnQgeCx5OwogICAgc2NhbmYoIiVkXG4iLCZ4KTsKICAgIHNjYW5mKCIlZFxuIiwmeSk7CiAgICBpbnQgcGF0aCh4LHkpOwogICAgcHJpbnRmKCIlZFxuIixwYXRoKHgseSkpOwoJLy8geW91ciBjb2RlIGdvZXMgaGVyZQoJcmV0dXJuIDA7Cn0K