[BOJ] 1822 차집합 (S4)

Author: letthem

심수연/5주차/260129.py

@@ -0,0 +1,15 @@
+# https://www.acmicpc.net/problem/1822
+
+import sys
+input = sys.stdin.readline
+
+numA, numB = map(int, input().split())
+A = set(input().split())
+B = set(input().split())
+
+a_minus_b = A - B
+
+print(len(a_minus_b))
+
+sorted_a_minus_b = sorted(map(int, a_minus_b))
+print(*sorted_a_minus_b)