#include <iostream>
int main(void) {
long int binary = 11100, hexadecimal = 0, i = 1;
while (binary != 0) {
int remainder = binary % 10;
hexadecimal = hexadecimal + remainder * i;
i = i * 2;
binary = binary / 10;
}
std::cout << std::hex << hexadecimal;
return 0;
}
/*
run:
1c
*/