I tested it offline,and I got WA 90.
But when I submited it.I got Crash(Access Violation).
There's another question.
For this input:
98 146
1 2 1
2 3 300
3 4 1
4 5 300
5 6 1
6 7 300
7 8 1
8 9 300
9 10 1
10 11 300
11 12 1
12 13 300
13 14 1
14 15 300
15 16 1
16 17 300
17 18 1
18 19 300
19 20 1
20 21 300
21 22 1
22 23 300
23 24 1
24 25 300
25 26 1
26 27 300
27 28 1
28 29 300
29 30 1
30 31 300
31 32 1
32 33 300
33 34 1
34 35 300
35 36 1
36 37 300
37 38 1
38 39 300
39 40 1
40 41 300
41 42 1
42 43 300
43 44 1
44 45 300
45 46 1
46 47 300
47 48 1
48 49 300
50 51 300
51 52 1
52 53 300
53 54 1
54 55 300
55 56 1
56 57 300
57 58 1
58 59 300
59 60 1
60 61 300
61 62 1
62 63 300
63 64 1
64 65 300
65 66 1
66 67 300
67 68 1
68 69 300
69 70 1
70 71 300
71 72 1
72 73 300
73 74 1
74 75 300
75 76 1
76 77 300
77 78 1
78 79 300
79 80 1
80 81 300
81 82 1
82 83 300
83 84 1
84 85 300
85 86 1
86 87 300
87 88 1
88 89 300
89 90 1
90 91 300
91 92 1
92 93 300
93 94 1
94 95 300
95 96 1
96 97 300
97 98 1
1 50 5
2 51 5
3 52 5
4 53 5
5 54 5
6 55 5
7 56 5
8 57 5
9 58 5
10 59 5
11 60 5
12 61 5
13 62 5
14 63 5
15 64 5
16 65 5
17 66 5
18 67 5
19 68 5
20 69 5
21 70 5
22 71 5
23 72 5
24 73 5
25 74 5
26 75 5
27 76 5
28 77 5
29 78 5
30 79 5
31 80 5
32 81 5
33 82 5
34 83 5
35 84 5
36 85 5
37 86 5
38 87 5
39 88 5
40 89 5
41 90 5
42 91 5
43 92 5
44 93 5
45 94 5
46 95 5
47 96 5
48 97 5
49 98 5
50 49 3
-1

My answer is:49 98 97
And I think it was quit correct.
But the output is:

49 50 1 2 51 52 3 4 53 54 5 6 55 56 7 8 57 58 9 10 59 60 11 12 61 62 13 14 63 64 15 16 65 66 17 18 67 68 19 20 69 70 21 22 71 72 23 24 73 74 25 26 75 76 27 28 77 78 29 30 79 80 31 32 81 82 33 34 83 84 35 36 85 86 37 38 87 88 39 40 89 90 41 42 91 92 43 44 93 94 45 46 95 96 47 48 97 98

Can anybody tell me how to solve these questions.

Thank you very much

1 2 51