[20251017] PGM / Lv2 / 영어 끝말잇기 / 이강현

Author: lkhyun

lkhyun/202510/17 PGM Lv2 영어 끝말잇기.md

@@ -0,0 +1,28 @@
+```java
+import java.util.*;
+class Solution {
+    public int[] solution(int n, String[] words) {
+        
+        Map<String,Boolean> history = new HashMap<>();
+        
+        int fail = 0;
+        String prev = words[0];
+        history.put(prev,true);
+        for(int i=1;i<words.length;i++){
+            if(prev.charAt(prev.length()-1) == words[i].charAt(0)
+               && history.get(words[i]) == null
+               && words.length>1){
+                prev = words[i];
+                history.put(words[i],true);
+            }else{
+                fail = i;
+                break;
+            }
+        }
+        if(fail == 0){
+            return new int[]{0,0};
+        }
+        return new int[]{(fail%n)+1,(fail/n)+1};
+    }
+}
+```