Merge pull request #54 from AlgoLeadMe/16-mong3125

16-mong3125

mong3125/문자열/PS스킬체크테스트1.java

@@ -0,0 +1,24 @@
+package 문자열;
+
+public class PS스킬체크테스트1 {
+    class Solution {
+        public boolean solution(String s) {
+            boolean answer = false;
+
+            int len_s = s.length();
+            if (len_s != 4 && len_s != 6) return false;
+
+            for (int i = 0; i < len_s; i++) {
+                char c = s.charAt(i);
+                if (c >= '0' && c <= '9') {
+                    answer = true;
+                } else {
+                    answer = false;
+                    break;
+                }
+            }
+
+            return answer;
+        }
+    }
+}

mong3125/문자열/PS스킬체크테스트2.java

@@ -0,0 +1,26 @@
+package 문자열;
+
+import java.util.*;
+
+public class PS스킬체크테스트2 {
+    class Solution {
+        public int[] solution(String s) {
+            int[] answer = new int[s.length()];
+
+            HashMap<Character, Integer> alphabet = new HashMap<>();
+
+            for (int i = 0; i < s.length(); i++) {
+                char now = s.charAt(i);
+                if (alphabet.containsKey(now)) {
+                    answer[i] = i - alphabet.get(now);
+                } else {
+                    answer[i] = -1;
+                }
+
+                alphabet.put(now, i);
+            }
+
+            return answer;
+        }
+    }
+}