题解

#include <iostream>
#include <bitset>

// 函数：获取一个整数的补码形式
std::bitset<32> getTwosComplement(int num) {
    // 如果是正数，直接返回二进制形式
    if (num >= 0) {
        return std::bitset<32>(num);
    } else {
        // 计算补码
        unsigned int absNum = static_cast<unsigned int>(-num);
        std::bitset<32> absBitset(absNum);

        // 按位取反
        absBitset = ~absBitset;

        // 加1
        bool carry = true;
        for (int i = 0; i < 32; ++i) {
            bool tmp = absBitset[i] ^ carry;
            carry = absBitset[i] & carry;
            absBitset[i] = tmp;
        }

        return absBitset;
    }
}

int main() {
    int num;
    std::cin>>num;
    std::bitset<32> twosComp = getTwosComplement(num);

    std::cout<< twosComp << std::endl;

    return 0;
}