function find_corrupt_numbers(nums) {
    let duplicateNumber, currentIndex = 0, missingIndex;
    while(currentIndex < nums.length) {
        if(nums[currentIndex] == currentIndex+1) currentIndex++;
        else {
            let swapIndex = nums[currentIndex]-1;
            if(nums[swapIndex] == nums[currentIndex]) {
                duplicateNumber = nums[swapIndex];
                missingIndex = currentIndex;
                currentIndex++;
            }
            else [nums[swapIndex], nums[currentIndex]] = [nums[currentIndex], nums[swapIndex]]
        }
    }
    return [duplicateNumber, missingIndex+1];
}