#include <cstdint>
// #include <iostream>
class Solution {
private:
    uint32_t setBit(uint32_t in, char value, char pos) {
        uint32_t ones = -1;
        uint32_t zero_mask = (ones ^ (value << pos));
        in = in & zero_mask;
        in = in ^ (value << pos);
        return in;
    }
public:
    uint32_t reverseBits(uint32_t n) {
        uint32_t out = 0;
        for (char i = 0; i < 32; i++) {
            out = setBit(out, n & 1, 31-i);
            n >>= 1;
        }
        return out;
    }
};

// int main() {
//     std::cout << setBit(8, 1, 3) << std::endl;
// }