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Author: kerong2002

C++/2441. Largest Positive Integer That Exists With Its Negative.cpp

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+class Solution {
+public:
+    int findMaxK(vector<int>& nums) {
+        sort(nums.begin(), nums.end());
+        int l = 0;
+        int r = nums.size() - 1;
+        while (l < r) {
+            if (nums[l] >= 0 || nums[r] <= 0) {
+                return -1;
+            }
+            if (-nums[l] == nums[r]) {
+                return nums[r];
+            }
+            else if (-nums[l] > nums[r]) {
+                ++l;
+            }
+            else{
+                --r;
+            }
+        }
+        return -1;
+    }
+};