Very easy solution using binary XOR operator.

  • 0

    Hello, dear users! Below you can see a simple way of solving this problem using binary XOR operator.

    int missingNumber(vector<int>& nums) {
        		int x = 0;
        		for (int i = 0; i < nums.size() + 1; i++)
        			x ^= i;
        		for (int i = 0; i < nums.size(); i++)
        			x ^= nums[i];
        		return x;

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