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4 0 LOAD_CONST 0 (3)
3 LOAD_CONST 1 (37)
6 LOAD_CONST 2 (72)
9 LOAD_CONST 3 (9)
12 LOAD_CONST 4 (6)
15 LOAD_CONST 5 (132)
18 BUILD_LIST 6
21 STORE_NAME 0 (en)
5 24 LOAD_CONST 6 (101)
27 LOAD_CONST 7 (96)
30 LOAD_CONST 8 (23)
33 LOAD_CONST 9 (68)
36 LOAD_CONST 10 (112)
39 LOAD_CONST 11 (42)
42 LOAD_CONST 12 (107)
45 LOAD_CONST 13 (62)
48 LOAD_CONST 7 (96)
51 LOAD_CONST 14 (53)
54 LOAD_CONST 15 (176)
57 LOAD_CONST 16 (179)
60 LOAD_CONST 17 (98)
63 LOAD_CONST 14 (53)
66 LOAD_CONST 18 (67)
69 LOAD_CONST 19 (29)
72 LOAD_CONST 20 (41)
75 LOAD_CONST 21 (120)
78 LOAD_CONST 22 (60)
81 LOAD_CONST 23 (106)
84 LOAD_CONST 24 (51)
87 LOAD_CONST 6 (101)
90 LOAD_CONST 25 (178)
93 LOAD_CONST 26 (189)
96 LOAD_CONST 6 (101)
99 LOAD_CONST 27 (48)
102 BUILD_LIST 26
105 STORE_NAME 1 (output)
7 108 LOAD_CONST 28 ('welcome to GWHT2020')
111 PRINT_ITEM
112 PRINT_NEWLINE
9 113 LOAD_NAME 2 (raw_input)
116 LOAD_CONST 29 ('please input your flag:')
119 CALL_FUNCTION 1
122 STORE_NAME 3 (flag)
10 125 LOAD_NAME 3 (flag)
128 STORE_NAME 4 (str)
12 131 LOAD_NAME 5 (len)
134 LOAD_NAME 4 (str)
137 CALL_FUNCTION 1
140 STORE_NAME 6 (a)
13 143 LOAD_NAME 6 (a)
146 LOAD_CONST 30 (38)
149 COMPARE_OP 0 (<)
152 POP_JUMP_IF_FALSE 173
14 155 LOAD_CONST 31 ('lenth wrong!')
158 PRINT_ITEM
159 PRINT_NEWLINE
15 160 LOAD_NAME 7 (exit)
163 LOAD_CONST 32 (0)
166 CALL_FUNCTION 1
169 POP_TOP
170 JUMP_FORWARD 0 (to 173)
17 >> 173 LOAD_NAME 8 (ord)
176 LOAD_NAME 4 (str)
179 LOAD_CONST 32 (0)
182 BINARY_SUBSCR
183 CALL_FUNCTION 1
186 LOAD_CONST 33 (2020)
189 BINARY_MULTIPLY
190 LOAD_NAME 8 (ord)
193 LOAD_NAME 4 (str)
196 LOAD_CONST 34 (1)
199 BINARY_SUBSCR
200 CALL_FUNCTION 1
203 BINARY_ADD
204 LOAD_CONST 33 (2020)
207 BINARY_MULTIPLY
208 LOAD_NAME 8 (ord)
211 LOAD_NAME 4 (str)
214 LOAD_CONST 35 (2)
217 BINARY_SUBSCR
218 CALL_FUNCTION 1
221 BINARY_ADD
222 LOAD_CONST 33 (2020)
225 BINARY_MULTIPLY
226 LOAD_NAME 8 (ord)
229 LOAD_NAME 4 (str)
232 LOAD_CONST 0 (3)
235 BINARY_SUBSCR
236 CALL_FUNCTION 1
239 BINARY_ADD
240 LOAD_CONST 33 (2020)
243 BINARY_MULTIPLY
244 LOAD_NAME 8 (ord)
247 LOAD_NAME 4 (str)
250 LOAD_CONST 36 (4)
253 BINARY_SUBSCR
254 CALL_FUNCTION 1
257 BINARY_ADD
258 LOAD_CONST 37 (1182843538814603)
261 COMPARE_OP 2 (==)
264 POP_JUMP_IF_FALSE 275
18 267 LOAD_CONST 38 ('good!continuexe2x80xa6xe2x80xa6')
270 PRINT_ITEM
271 PRINT_NEWLINE
272 JUMP_FORWARD 15 (to 290)
20 >> 275 LOAD_CONST 39 ('bye~')
278 PRINT_ITEM
279 PRINT_NEWLINE
21 280 LOAD_NAME 7 (exit)
283 LOAD_CONST 32 (0)
286 CALL_FUNCTION 1
289 POP_TOP
23 >> 290 BUILD_LIST 0
293 STORE_NAME 9 (x)
24 296 LOAD_CONST 40 (5)
299 STORE_NAME 10 (k)
25 302 SETUP_LOOP 128 (to 433)
305 LOAD_NAME 11 (range)
308 LOAD_CONST 41 (13)
311 CALL_FUNCTION 1
314 GET_ITER
>> 315 FOR_ITER 114 (to 432)
318 STORE_NAME 12 (i)
26 321 LOAD_NAME 8 (ord)
324 LOAD_NAME 4 (str)
327 LOAD_NAME 10 (k)
330 BINARY_SUBSCR
331 CALL_FUNCTION 1
334 STORE_NAME 13 (b)
27 337 LOAD_NAME 8 (ord)
340 LOAD_NAME 4 (str)
343 LOAD_NAME 10 (k)
346 LOAD_CONST 34 (1)
349 BINARY_ADD
350 BINARY_SUBSCR
351 CALL_FUNCTION 1
354 STORE_NAME 14 (c)
28 357 LOAD_NAME 14 (c)
360 LOAD_NAME 0 (en)
363 LOAD_NAME 12 (i)
366 LOAD_CONST 4 (6)
369 BINARY_MODULO
370 BINARY_SUBSCR
371 BINARY_XOR
372 STORE_NAME 15 (a11)
29 375 LOAD_NAME 13 (b)
378 LOAD_NAME 0 (en)
381 LOAD_NAME 12 (i)
384 LOAD_CONST 4 (6)
387 BINARY_MODULO
388 BINARY_SUBSCR
389 BINARY_XOR
390 STORE_NAME 16 (a22)
30 393 LOAD_NAME 9 (x)
396 LOAD_ATTR 17 (append)
399 LOAD_NAME 15 (a11)
402 CALL_FUNCTION 1
405 POP_TOP
31 406 LOAD_NAME 9 (x)
409 LOAD_ATTR 17 (append)
412 LOAD_NAME 16 (a22)
415 CALL_FUNCTION 1
418 POP_TOP
32 419 LOAD_NAME 10 (k)
422 LOAD_CONST 35 (2)
425 INPLACE_ADD
426 STORE_NAME 10 (k)
429 JUMP_ABSOLUTE 315
>> 432 POP_BLOCK
33 >> 433 LOAD_NAME 9 (x)
436 LOAD_NAME 1 (output)
439 COMPARE_OP 2 (==)
442 POP_JUMP_IF_FALSE 453
34 445 LOAD_CONST 38 ('good!continuexe2x80xa6xe2x80xa6')
448 PRINT_ITEM
449 PRINT_NEWLINE
450 JUMP_FORWARD 15 (to 468)
36 >> 453 LOAD_CONST 42 ('oh,you are wrong!')
456 PRINT_ITEM
457 PRINT_NEWLINE
37 458 LOAD_NAME 7 (exit)
461 LOAD_CONST 32 (0)
464 CALL_FUNCTION 1
467 POP_TOP
39 >> 468 LOAD_NAME 5 (len)
471 LOAD_NAME 4 (str)
474 CALL_FUNCTION 1
477 STORE_NAME 18 (l)
40 480 LOAD_NAME 8 (ord)
483 LOAD_NAME 4 (str)
486 LOAD_NAME 18 (l)
489 LOAD_CONST 43 (7)
492 BINARY_SUBTRACT
493 BINARY_SUBSCR
494 CALL_FUNCTION 1
497 STORE_NAME 19 (a1)
41 500 LOAD_NAME 8 (ord)
503 LOAD_NAME 4 (str)
506 LOAD_NAME 18 (l)
509 LOAD_CONST 4 (6)
512 BINARY_SUBTRACT
513 BINARY_SUBSCR
514 CALL_FUNCTION 1
517 STORE_NAME 20 (a2)
42 520 LOAD_NAME 8 (ord)
523 LOAD_NAME 4 (str)
526 LOAD_NAME 18 (l)
529 LOAD_CONST 40 (5)
532 BINARY_SUBTRACT
533 BINARY_SUBSCR
534 CALL_FUNCTION 1
537 STORE_NAME 21 (a3)
43 540 LOAD_NAME 8 (ord)
543 LOAD_NAME 4 (str)
546 LOAD_NAME 18 (l)
549 LOAD_CONST 36 (4)
552 BINARY_SUBTRACT
553 BINARY_SUBSCR
554 CALL_FUNCTION 1
557 STORE_NAME 22 (a4)
44 560 LOAD_NAME 8 (ord)
563 LOAD_NAME 4 (str)
566 LOAD_NAME 18 (l)
569 LOAD_CONST 0 (3)
572 BINARY_SUBTRACT
573 BINARY_SUBSCR
574 CALL_FUNCTION 1
577 STORE_NAME 23 (a5)
45 580 LOAD_NAME 8 (ord)
583 LOAD_NAME 4 (str)
586 LOAD_NAME 18 (l)
589 LOAD_CONST 35 (2)
592 BINARY_SUBTRACT
593 BINARY_SUBSCR
594 CALL_FUNCTION 1
597 STORE_NAME 24 (a6)
46 600 LOAD_NAME 19 (a1)
603 LOAD_CONST 0 (3)
606 BINARY_MULTIPLY
607 LOAD_NAME 20 (a2)
610 LOAD_CONST 35 (2)
613 BINARY_MULTIPLY
614 BINARY_ADD
615 LOAD_NAME 21 (a3)
618 LOAD_CONST 40 (5)
621 BINARY_MULTIPLY
622 BINARY_ADD
623 LOAD_CONST 44 (1003)
626 COMPARE_OP 2 (==)
629 POP_JUMP_IF_FALSE 807
47 632 LOAD_NAME 19 (a1)
635 LOAD_CONST 36 (4)
638 BINARY_MULTIPLY
639 LOAD_NAME 20 (a2)
642 LOAD_CONST 43 (7)
645 BINARY_MULTIPLY
646 BINARY_ADD
647 LOAD_NAME 21 (a3)
650 LOAD_CONST 3 (9)
653 BINARY_MULTIPLY
654 BINARY_ADD
655 LOAD_CONST 45 (2013)
658 COMPARE_OP 2 (==)
661 POP_JUMP_IF_FALSE 807
48 664 LOAD_NAME 19 (a1)
667 LOAD_NAME 20 (a2)
670 LOAD_CONST 46 (8)
673 BINARY_MULTIPLY
674 BINARY_ADD
675 LOAD_NAME 21 (a3)
678 LOAD_CONST 35 (2)
681 BINARY_MULTIPLY
682 BINARY_ADD
683 LOAD_CONST 47 (1109)
686 COMPARE_OP 2 (==)
689 POP_JUMP_IF_FALSE 804
49 692 LOAD_NAME 22 (a4)
695 LOAD_CONST 0 (3)
698 BINARY_MULTIPLY
699 LOAD_NAME 23 (a5)
702 LOAD_CONST 35 (2)
705 BINARY_MULTIPLY
706 BINARY_ADD
707 LOAD_NAME 24 (a6)
710 LOAD_CONST 40 (5)
713 BINARY_MULTIPLY
714 BINARY_ADD
715 LOAD_CONST 48 (671)
718 COMPARE_OP 2 (==)
721 POP_JUMP_IF_FALSE 801
50 724 LOAD_NAME 22 (a4)
727 LOAD_CONST 36 (4)
730 BINARY_MULTIPLY
731 LOAD_NAME 23 (a5)
734 LOAD_CONST 43 (7)
737 BINARY_MULTIPLY
738 BINARY_ADD
739 LOAD_NAME 24 (a6)
742 LOAD_CONST 3 (9)
745 BINARY_MULTIPLY
746 BINARY_ADD
747 LOAD_CONST 49 (1252)
750 COMPARE_OP 2 (==)
753 POP_JUMP_IF_FALSE 798
51 756 LOAD_NAME 22 (a4)
759 LOAD_NAME 23 (a5)
762 LOAD_CONST 46 (8)
765 BINARY_MULTIPLY
766 BINARY_ADD
767 LOAD_NAME 24 (a6)
770 LOAD_CONST 35 (2)
773 BINARY_MULTIPLY
774 BINARY_ADD
775 LOAD_CONST 50 (644)
778 COMPARE_OP 2 (==)
781 POP_JUMP_IF_FALSE 795
52 784 LOAD_CONST 51 ('congraduation!you get the right flag!')
787 PRINT_ITEM
788 PRINT_NEWLINE
789 JUMP_ABSOLUTE 795
792 JUMP_ABSOLUTE 798
>> 795 JUMP_ABSOLUTE 801
>> 798 JUMP_ABSOLUTE 804
>> 801 JUMP_ABSOLUTE 807
>> 804 JUMP_FORWARD 0 (to 807)
>> 807 LOAD_CONST 52 (None)
810 RETURN_VALUE
看出了是python字节码，然后就顺手查了一下
参考了下面这个文章：
https://blog.csdn.net/palmer9/article/details/112007899
方程组求解就可以了
over.