c_cpp 217.包含重复 - 难度容易 - 2018.9.17

Posted 2021-05-14

class Solution {
public:
    bool containsDuplicate(vector<int>& nums) {
        map<int, int> intMap;
        for (int i = 0; i < nums.size(); i++) {
            intMap[nums[i]] += 1;
            int num = intMap[nums[i]];
            if (num > 1) {
                return true;
            }
        }
        return false;
    }
};