int("".join(["1" if i == "0" else "0" for i in bin(n)[2:].rjust(32, "0")]), 2)

long flippingBits(long n) {
    long result = 0;
    for(int i = 31; i >= 0; i--) {
        if(n >= pow(2, i)){
            n -= pow(2,i);
        }
        else result += pow(2, i);
    }
    return result;
}

long flippingBits(long n) {
    return 4294967295 ^ n;
}

def binary(num):
    remainders = []
    while num != 0 :
        remainders.insert(0, str(num % 2))
        num //= 2
    return "".join(remainders)

def decimal(num):
    newnum = 0
    for i in range(len(num)):
        newnum += int(num[-i - 1]) * 2 ** i
    return newnum

def flippingBits(n):
    num = binary(n)
    num = "0" * (32 - len(num)) + num
    for i in range(len(num)):
        if num[i] == "0":
            num = num[:i] + "1" + num[i + 1:]
        else:
            num = num[:i] + "0" + num[i + 1:]
    return decimal(num)