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LintCode/Single Number.cpp at master · KickAlgorithm/LintCode · GitHub

14 lines (14 loc) · 275 Bytes

class Solution {
     * @param A: Array of integers.
     * return: The single number.
    int singleNumber(vector<int> &A) {
        // write your code here
        int res(0);
        for(int e : A)
            res ^= e;
        return res;

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