git reimport

archive/2019.02/2019.02.27 - Hello 2019/TaskC.java

@@ -0,0 +1,58 @@
+package chelper;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import io.InputReader;
+import io.OutputWriter;
+import solutions.ChelperSolution;
+
+
+public class TaskC extends ChelperSolution {
+
+  @Override
+  public void solve(int testNumber, InputReader in, OutputWriter out) {
+    super.solve(testNumber, in, out);
+  }
+
+  @Override
+  public void solve(int testNumber) {
+    int n = in.nextInt();
+
+    int equals = 0;
+    Map<Integer, Integer> counts = new HashMap<>();
+
+    for (int i = 0; i < n; i++) {
+      String s = in.nextString();
+
+      int balance = 0;
+      int min = 0;
+      for (char c : s.toCharArray()) {
+        if (c == '(') {
+          balance++;
+        } else {
+          balance--;
+        }
+        min = Math.min(min, balance);
+      }
+
+      if (min == 0 && balance == 0) {
+        equals++;
+        continue;
+      }
+
+      if ((min == 0 && balance > 0) || (min < 0 && balance == min)) {
+        counts.put(balance, 1 + counts.getOrDefault(balance, 0));
+      }
+    }
+
+    int res = equals / 2;
+    for (Map.Entry<Integer, Integer> entry : counts.entrySet()) {
+      if (entry.getKey() > 0) {
+        res += Math.min(entry.getValue(), counts.getOrDefault(-entry.getKey(), 0));
+      }
+    }
+
+    out.println(res);
+  }
+}