#include<stdio.h>
int main() {
int a, b, sum;
sum = a + b;
return(0);
}
CgojaW5jbHVkZTxzdGRpby5oPgoKaW50IG1haW4oKSB7CiAgIGludCBhLCBiLCBzdW07CgogICBwcmludGYoIlxuRW50ZXIgdHdvIG5vOiAiKTsKICAgc2NhbmYoIiVkICVkIiwgJmEsICZiKTsKCiAgIHN1bSA9IGEgKyBiOwoKICAgcHJpbnRmKCJTdW0gOiAlZCIsIHN1bSk7CgogICByZXR1cm4oMCk7Cn0K