How to learn Divide and Conquer strategy??????

Правка en3, от i_am_eating_wa_and_tle, 2017-02-23 14:30:11

In the Editorial "Divide by Zero and Codeforces Round #399 (Div. 1+2, combined)" the problem setter said PROBLEM B can be solved easily by using DIVIDE AND CONQUER strategy. How to learn this strategy????

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en3 Английский i_am_eating_wa_and_tle 2017-02-23 14:30:11 13
en2 Английский i_am_eating_wa_and_tle 2017-02-23 14:28:46 26
en1 Английский i_am_eating_wa_and_tle 2017-02-23 14:27:10 254 Initial revision (published)