414. 第三大的数

简单

class Solution {
public:int thirdMax(vector<int>& nums) {int n = nums.size();long  first , second,third;first = second = third =  LONG_MIN ;bool find = false;for(auto num : nums){if(num > first){   third = second;second = first;first = num;}else {if(num > second && num < first){   third = second;second = num;}else{if( num > third && num < second){third = num;find = true;}}}}return third == LONG_MIN ? first : third;}};