Valid brackets / 중급

Author: bona1122

bona1122/[week2]Stack/Valid_brackets.js

@@ -0,0 +1,10 @@
+const solution = (s) => {
+  let cnt = 0;
+
+  for (let i = 0; i < s.length; i++) {
+    cnt += s[i] === "(" ? +1 : -1;
+    if (cnt < 0) return false;
+  }
+
+  return cnt === 0;
+};