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#F0776. April Fools' Problem (hard)

    ID: 782 传统题 2000ms 256MiB 尝试: 0 已通过: 0 难度: (无) 上传者: 标签>待分类整理状态难度待定难度共享题库Codeforces英文题面题目来源题面语言

April Fools' Problem (hard)

题目描述

O. April Fools' Problem (hard)
time limit per test
10 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

The plans for HC2 are rather far-fetched: we are just over 500 000 days away from HC2 3387, for example, and accordingly we are planning to have a couple hundred thousand problems in that edition (we hope that programming contests will become wildly more popular). The marmots need to get to work, and they could use a good plan...

Input

Same as the medium version, but the limits have changed: 1≤k≤n≤500000.

Output

Same as the medium version.

Example
Input
8 4
3 8 7 9 9 4 6 8
2 5 9 4 3 8 9 1
Output
32

题目来源：fps-www.educg.net-codeforce-1-2833.xml.zip；FPS 共享题包，题包内第 203 题。保留原作者与原赛事署名。