Update squares-of-a-sorted-array.cpp

Author: kamyu104

C++/squares-of-a-sorted-array.cpp

@@ -4,12 +4,8 @@
 class Solution {
 public:
     vector<int> sortedSquares(vector<int>& A) {
-        int right = 0;
-        while (right < A.size() && A[right] < 0) {
-            ++right;
-        }
+        int right = distance(A.cbegin(), lower_bound(A.cbegin(), A.cend(), 0));
         int left = right - 1;
-
         vector<int> result;
         while (0 <= left || right < A.size()) {
             if (right == A.size() ||