[BOJ] 2866 문자열 잘라내기 (G5)

Author: poodlepoodle

최어진/8주차/260216.py

@@ -0,0 +1,40 @@
+# 백준 2866번: 문자열 잘라내기
+
+import sys
+
+input = sys.stdin.readline
+
+# R, C <= 10^3
+R, C = map(int, input().rstrip().split())
+table = [list(input().rstrip()) for _ in range(R)]
+
+def check_duplication(start_R): # 10^6
+    dictionary = set()
+    # print(start_R)
+
+    for c in range(C):
+        string = ''
+        for r in range(start_R, R):
+            string += table[r][c]
+        # print(string)
+        if string in dictionary:
+            # print(False)
+            return False
+        dictionary.add(string)
+    # print(True)
+    # print()
+    return True
+
+answer = 0
+start, end = 0, R - 1
+while start <= end:
+    middle = (start + end) // 2
+    # print(middle)
+
+    if not check_duplication(middle):
+        end = middle - 1
+    else:
+        answer = max(answer, middle)
+        start = middle + 1
+
+print(answer)