113차 1번 문제풀이

Author: gmlrude

live11/test113/문제1/박희경.py

@@ -0,0 +1,23 @@
+import sys
+
+input = sys.stdin.readline
+
+t = int(input())
+for _ in range(t):
+    n = int(input())
+    number = []
+    for _ in range(n):
+        number.append(list(map(str, input().rstrip())))
+    number.sort()
+    
+    res = "YES"
+    for k in range(len(number) - 1):
+        idx = 0
+        while number[k][idx] == number[k+1][idx]:
+            idx += 1
+            if idx >= min(len(number[k]), len(number[k+1])):
+                res = 'NO'
+                break
+            
+
+    print(res)