Solved some problem from codechef and codeforces

1 files changed, 33 insertions, 0 deletions

diff --git a/codechef/DenseBracketSequence/main.cpp b/codechef/DenseBracketSequence/main.cpp
new file mode 100644
index 0000000..6785a12
--- /dev/null
+++ b/codechef/DenseBracketSequence/main.cpp
@@ -0,0 +1,33 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+  int tt;
+  cin >> tt;
+  while (tt--) {
+    int n;
+    cin >> n;
+    string s;
+    cin >> s;
+    int count = 0;
+    stack<char> st;
+    st.push(s[0]);
+    for(int i = 1; i < n; i++) {
+      if(s[i] == '(') {
+        st.push('(');
+      }
+      if(s[i] == ')') {
+        if(st.top() == '(' && !st.empty()){
+          st.pop();
+          count++;
+        }
+      }
+    }
+    cout << count << endl;
+  }
+}
+
+