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为何还是WA呢？

Posted by bestzsx at 2007-10-12 11:16:28 on Problem 1286 
Input:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
-2
-1
Output:
0
3
6
10
21
39
92
198
498
1219
3210
8418
22913
62415
173088
481598
1351983
3808083
10781954
30615354
87230157
249144711
713387076
2046856566
0
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