LeetCode-Contains DuplicateI

class Solution {public:bool containsDuplicate(vector<int>& nums) {sort(nums.begin(),nums.end());for (int i = 1; i < nums.size(); ++i){if (nums[i] == nums[i - 1]) {return 1;}}return 0;}};

runcode的时候，如果用for(int i = 0;i < nums.size()-1; ++i)则说超出时间！