Added 13 solutions

2017-03-18 22:17:22 -05:00
parent b1992b3e60
commit 8239026cea
30 changed files with 1945 additions and 1312 deletions
@@ -10,27 +10,20 @@ public class Solution {
        Scanner scan = new Scanner(System.in);
        int N  = scan.nextInt();
        scan.nextLine(); // gets rid of pesky newline
-        HashMap<String, Integer> map  = new HashMap<>();
        
+        /* Create and fill HashMap */
+        HashMap<String, Integer> map  = new HashMap<>();
        for (int i = 0; i < N; i++) {
            String str = scan.nextLine();
-            if (map.containsKey(str)) {
-                map.put(str, map.get(str) + 1);
-            } else {
-                map.put(str, 1);
-            }
+            map.merge(str, 1, Integer::sum);
        }
-        
+       
+        /* Query HashMap */
        int Q = scan.nextInt();
        scan.nextLine(); // gets rid of pesky newline
-        
        for (int i = 0; i < Q; i++) {
            String str = scan.nextLine();
-            if (map.containsKey(str)) {
-                System.out.println(map.get(str));
-            } else {
-                System.out.println(0);
-            }
+            System.out.println(map.getOrDefault(str, 0));
        }
    }
 }