ICPC Asia-Kharagpur Onsite Contest 2019

Problem A

Solved by Once. 00:21 (+)

可能碰撞的两个小球的速度和位置的乘积是相同的。用 set 维护之后枚举即可。

Problem B

Solved by bingoier. 01:49 (+)

打表找规律题，发现小的往大的中间交错插入是最优的。

Problem C

Solved by yanghong. 04:31 (+1)

结论题， k>0 时删除两条边

Problem D

Unsolved. (-3)

Problem E

Solved by bingoier. 03:56 (+1)

因为每种颜色之间相互独立，可以分开考虑。

维护每两个相同颜色之间的距离，一正一反做个FFT取大的一半即是对答案的贡献。

Problem F

Solved by yanghong. 01:00 (+3)

Problem G

Solved by Once. 00:30 (+)

枚举坐不坐火车的情况，计算。

Problem H

Unsolved.

Problem I

Unsolved.

Problem J

Solved by bingoier. 00:26 (+)

二分签到题。

Problem K

Solved by yanghong. 01:13 (+1)

Problem L

Solved by Once. 02:26 (+1)

二分答案，之后由于体积只有 2 和 1 的情况，所以可以贪心，先放体积为 2 的，再放体积为 1 的。