#include <stdio.h>
int main(void) {
int a = 3;
int n = 0;
while (a <= 10000) {
a = 2 * a - 1;
n=n+1;
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CiAKaW50IG1haW4odm9pZCkgewogICAgaW50IGEgPSAzOwogICAgaW50IG4gPSAwOwogCiAgICB3aGlsZSAoYSA8PSAxMDAwMCkgewogICAgICAgIGEgPSAyICogYSAtIDE7CiAgICAgICAgbj1uKzE7CiAgICB9CiAKICAgIHByaW50ZigiJWQiLCBhKTsKIAogIAlyZXR1cm4gMDsKfQogCg==