From 09ff307ea01b35f81704c196b7f8567e544d2d57 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Khoa=20Hu=E1=BB=B3nh=20=28Daniel=29?= <khoa0319@gmail.com>
Date: Sat, 6 Apr 2024 23:02:32 +0700
Subject: [PATCH] Update 1249

---
 solution/1249/main.go | 45 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 solution/1249/main.go

diff --git a/solution/1249/main.go b/solution/1249/main.go
new file mode 100644
index 0000000..8331f02
--- /dev/null
+++ b/solution/1249/main.go
@@ -0,0 +1,45 @@
+package main
+
+type stack struct {
+    top   int
+    v     []byte
+    index []int
+}
+
+func minRemoveToMakeValid(s string) string {
+    stc := stack{top: -1}
+
+    // collect bad brackets
+    for i, v := range s {
+        if v == '(' {
+            stc.v = append(stc.v, '(')
+            stc.index = append(stc.index, i)
+            stc.top++
+        } else if v == ')' {
+            if stc.top > -1 && stc.v[stc.top] == '(' {
+                stc.v = stc.v[:stc.top]
+                stc.index = stc.index[:stc.top]
+                stc.top--
+            } else {
+                stc.v = append(stc.v, ')')
+                stc.index = append(stc.index, i)
+                stc.top++
+            }
+        }
+    }
+
+    // remove them
+    res := []byte{}
+    i := 0
+    for _, v := range stc.index {
+        res = append(res, s[i:v]...)
+        i = v + 1
+    }
+
+    // checking of end
+    if len(res) + len(stc.index) < len(s) {
+        res = append(res, s[i:]...)
+    }
+
+    return string(res)
+}