#include <stdio.h>
int main(void) {
int i;
for (i = 0; i < 20; i++) {
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CiAgICBpbnQgaTsKCiAgICBmb3IgKGkgPSAwOyBpIDwgMjA7IGkrKykgewogICAgICAgIHByaW50ZigiIyIpOwogICAgfQoKICAgIAogICAgcHJpbnRmKCJcbiIpOwoKICAgIHJldHVybiAwOwp9