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01待解決的重要問題:

設計二分,線段樹,樹狀數組:

code forces470C. Producing Snow 

http://codeforces.com/contest/948/problem/C

解法參考:二分:http://blog.csdn.net/haut_ykc/article/details/79514717

樹狀數組:https://www.cnblogs.com/HazelNut/p/8543562.html

線段樹:http://blog.csdn.net/dlpf_c/article/details/79515459

https://www.cnblogs.com/xfww/p/8543482.html