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七月 08, 2020
B. A and B 题意给出两个数 a b第i次操作可以给a+=i或给b+=i;问最少几次操作使得a==b 启发...
D. Yet Another Yet Another Task 题意 长度为n的数组a 其中-30<=ai<=30 要求找到“区间和-区间最大...