#include <iostream>
#include <unistd.h>

int main() {
    int number = {0};
    int found = {0};

    std::cout << "Please enter int: ";
    std::cin >> number;
    std::cout << std::endl;

    if (number < 2){
        std::cout << "no";

        return 0;
    }

    while (true){
        number >>= 1;

        const int lowerBit = number & 1;

        if (lowerBit == 1){
            found++;
        }

        if (number == 0){
            break;
        }
    }

    if (found == 1){
        std::cout << "yes";
    } else {
        std::cout << "no";
    }
}