O(n) time and O(1) space Java Solution. FInding sum and then subtracting

  • 3
    public int missingNumber(int[] nums) {
        int len =nums.length;
        int sum = (int)((len*(len+1))/2); //Finding sum of all the integers from 1 to n 
        for(int i: nums)
        return sum;

  • 0

    One potential problem would be if the sum is too large?

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