CodeForces 581 A,B,C,D 泛做

tonyfang posted @ 2015年9月30日 20:26 in CodeForces with tags c++ OI , 750 阅读

很符合Noip PJ的难度……

果然CF还是要Chinese Round比较激情~

不多说,说题解:

1.(A) 纯粹找找规律就行,最后答案很简单,O(1)

2.(B) 随便模拟模拟就行,O(n)

3.(C) 贪心方法,每次给位数最后的先加,还有剩再10,10地加其他的。

4.(D) 只要枚举就行,复杂度能承受。

 

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