leetcode-grind/problems/476/main.c

#include <stdio.h>

int findComplement(int num) {
    int mask = num;
    mask |= mask >> 1;
    mask |= mask >> 2;
    mask |= mask >> 4;
    mask |= mask >> 8;
    mask |= mask >> 16;
    return ~num & mask;
}

int main() {
    printf("Expected: 2\n");
    printf("Got: %d\n", findComplement(5));
}