Sample Input 1

encrypt
rjfzowngxeqkmcihtdyvlbpasu
24
this_is_a_secret_message

Sample Output 1

vgxy_xy_r_yofdov_moyyrno

decrypt
rjfzowngxeqkmcihtdyvlbpasu
24
vgxy_xy_r_yofdov_moyyrno

this_is_a_secret_message

decrypt
psivaykmbjgtcouhwdrxzelnfq
52
iuokdpxztpxbuor_mada_br_fuzd_ytpk_ohri_br_ru_plaruca

congratulations_here_is_your_flag_npsc_is_so_awesome

No.	Testdata Range	Constraints	Score
1	0~2	範例測資	0
2	0~52	無額外限制	100

No.	Time Limit (ms)	Memory Limit (VSS, KiB)	Output Limit (KiB)	Subtasks
0	2000	1048576	1048576	1 2
1	2000	1048576	1048576	1 2
2	2000	1048576	1048576	1 2
3	2000	1048576	1048576	2
4	2000	1048576	1048576	2
5	2000	1048576	1048576	2
6	2000	1048576	1048576	2
7	2000	1048576	1048576	2
8	2000	1048576	1048576	2
9	2000	1048576	1048576	2
10	2000	1048576	1048576	2
11	2000	1048576	1048576	2
12	2000	1048576	1048576	2
13	2000	1048576	1048576	2
14	2000	1048576	1048576	2
15	2000	1048576	1048576	2
16	2000	1048576	1048576	2
17	2000	1048576	1048576	2
18	2000	1048576	1048576	2
19	2000	1048576	1048576	2
20	2000	1048576	1048576	2
21	2000	1048576	1048576	2
22	2000	1048576	1048576	2
23	2000	1048576	1048576	2
24	2000	1048576	1048576	2
25	2000	1048576	1048576	2
26	2000	1048576	1048576	2
27	2000	1048576	1048576	2
28	2000	1048576	1048576	2
29	2000	1048576	1048576	2
30	2000	1048576	1048576	2
31	2000	1048576	1048576	2
32	2000	1048576	1048576	2
33	2000	1048576	1048576	2
34	2000	1048576	1048576	2
35	2000	1048576	1048576	2
36	2000	1048576	1048576	2
37	2000	1048576	1048576	2
38	2000	1048576	1048576	2
39	2000	1048576	1048576	2
40	2000	1048576	1048576	2
41	2000	1048576	1048576	2
42	2000	1048576	1048576	2
43	2000	1048576	1048576	2
44	2000	1048576	1048576	2
45	2000	1048576	1048576	2
46	2000	1048576	1048576	2
47	2000	1048576	1048576	2
48	2000	1048576	1048576	2
49	2000	1048576	1048576	2
50	2000	1048576	1048576	2
51	2000	1048576	1048576	2
52	2000	1048576	1048576	2