Create minimum-changes-to-make-alternating-binary-string.cpp

Author: kamyu104

C++/minimum-changes-to-make-alternating-binary-string.cpp

@@ -0,0 +1,15 @@
+// Time:  O(n)
+// Space: O(1)
+
+class Solution {
+public:
+    int minOperations(string s) {
+        int cnt = 0;
+        for (int i = 0; i < size(s); ++i) {
+            if (s[i] - '0' == i % 2) {
+                ++cnt;
+            }
+        }
+        return min(cnt, int(size(s)) - cnt);
+    }
+};