第一题 import sys str_list = [x for x in sys.stdin.readline().strip()] K = int(len(str_list)/4) for i in range(K+1): if (i == 0): j = 1 line = str_list[0] while(j<=K): line = line + str_list[j] j = j+1 if (i == K): j = 1 line = ...