#include <stdio.h>
int main(void) {
int n=2;
do{
n=n+2;}
while(n<=50);
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CiAgICBpbnQgbj0yOwogICAgZG97CiAgICBwcmludGYoIiVkIixuKTsKICAgIG49bisyO30KICAgIHdoaWxlKG48PTUwKTsKICAgIAoJcmV0dXJuIDA7Cn0K