Exercise2

Exercise/Homework2/Q1.cpp

@@ -0,0 +1,43 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+int map(char c) {
+    if (c == '{') return 4;
+    if (c == '[') return 3;
+    if (c == '(') return 2;
+    if (c == '<') return 1;
+    return 0;
+}
+
+bool match(char a, char b) {
+    return (a == '(' && b == ')') || (a == '[' && b == ']') || (a == '{' && b == '}') || (a == '<' && b == '>');
+}
+
+bool check(const string& s) {
+    string front;
+    for (int i = 0; i < s.size(); i++) {
+        if (s[i] == '{' || s[i] == '[' || s[i] == '(' || s[i] == '<') {
+            if (!front.empty() && map(front.back()) <= map(s[i]))
+                return false;
+            front.push_back(s[i]);
+        } else if (s[i] == '}' || s[i] == ']' || s[i] == ')' || s[i] == '>') {
+            if (front.empty() || !match(front.back(), s[i]))
+                return false;
+            front.pop_back();
+        }
+    }
+    return front.empty();
+}
+
+int main() {
+    int n;
+    cin >> n;
+    for (int i = 0; i < n; i++) {
+        string s;
+        cin >> s;
+        cout << (check(s) ? "Match" : "Fail") << endl;
+    }
+    return 0;
+}
+