第一题:数组拼接 import sys if __name__ == "__main__": # 读取第一行的n n = int(sys.stdin.readline().strip()) # n = 3 # matrix=[[2, 5, 6, 7, 9, 5, 7],[1, 7, 4, 3, 4]] matrix = [] while True: line = sys.stdin.readline().strip() if line == "": ...