CF1249E.By Elevator or Stairs?

普及+/提高

通过率:0%

时间限制:2.00s

内存限制:256MB

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题目描述

You are planning to buy an apartment in a nn-floor building. The floors are numbered from 11 to nn from the bottom to the top. At first for each floor you want to know the minimum total time to reach it from the first (the bottom) floor.

Let:

  • aia_i for all ii from 11 to n−1n-1 be the time required to go from the ii-th floor to the (i+1)(i+1)-th one (and from the (i+1)(i+1)-th to the ii-th as well) using the stairs;
  • bib_i for all ii from 11 to n−1n-1 be the time required to go from the ii-th floor to the (i+1)(i+1)-th one (and from the (i+1)(i+1)-th to the ii-th as well) using the elevator, also there is a value cc — time overhead for elevator usage (you need to wait for it, the elevator doors are too slow!).

In one move, you can go from the floor you are staying at xx to any floor yy (x≠yx \ne y) in two different ways:

  • If you are using the stairs, just sum up the corresponding values of aia_i. Formally, it will take ∑i=min(x,y)max(x,y)−1ai\sum\limits_{i=min(x, y)}^{max(x, y) - 1} a_i time units.
  • If you are using the elevator, just sum up cc and the corresponding values of bib_i. Formally, it will take c+∑i=min(x,y)max(x,y)−1bic + \sum\limits_{i=min(x, y)}^{max(x, y) - 1} b_i time units.

You can perform as many moves as you want (possibly zero).

So your task is for each ii to determine the minimum total time it takes to reach the ii-th floor from the 11-st (bottom) floor.

你计划在一座 nn 层的楼房中购买一套公寓。楼层从下到上编号为 11 到 nn。最初,你希望对每一层楼,计算出从第 11 层(最底层)到达该层所需的最少总时间。

定义:

  • 对于所有 ii 从 11 到 n−1n-1,aia_i 表示使用楼梯从第 ii 层前往第 (i+1)(i+1) 层(以及从第 (i+1)(i+1) 层返回第 ii 层)所需的时间;
  • 对于所有 ii 从 11 到 n−1n-1,bib_i 表示使用电梯从第 ii 层前往第 (i+1)(i+1) 层(以及从第 (i+1)(i+1) 层返回第 ii 层)所需的时间;此外还有一个常数 cc —— 电梯使用的时间开销(需等待电梯、电梯门开关过慢等)!

一次移动中,你可以从当前所在楼层 xx 前往任意其他楼层 yy(x≠yx \ne y),方式有两种:

  • 若使用楼梯,则只需累加对应的 aia_i 值。形式化地,所需时间为 ∑i=min(x,y)max(x,y)−1ai\sum\limits_{i=min(x, y)}^{max(x, y) - 1} a_i 个时间单位;
  • 若使用电梯,则需累加 cc 及对应的 bib_i 值。形式化地,所需时间为 c+∑i=min(x,y)max(x,y)−1bic + \sum\limits_{i=min(x, y)}^{max(x, y) - 1} b_i 个时间单位。

你可以执行任意多次(包括零次)移动。

因此,你的任务是对每个 ii,求出从第 11 层(最底层)到达第 ii 层所需的最少总时间。

输入格式

The first line of the input contains two integers nn and cc (2≤n≤2⋅105,1≤c≤10002 \le n \le 2 \cdot 10^5, 1 \le c \le 1000) — the number of floors in the building and the time overhead for the elevator rides.

The second line of the input contains n−1n - 1 integers a1,a2,…,an−1a_1, a_2, \dots, a_{n-1} (1≤ai≤10001 \le a_i \le 1000), where aia_i is the time required to go from the ii-th floor to the (i+1)(i+1)-th one (and from the (i+1)(i+1)-th to the ii-th as well) using the stairs.

The third line of the input contains n−1n - 1 integers b1,b2,…,bn−1b_1, b_2, \dots, b_{n-1} (1≤bi≤10001 \le b_i \le 1000), where bib_i is the time required to go from the ii-th floor to the (i+1)(i+1)-th one (and from the (i+1)(i+1)-th to the ii-th as well) using the elevator.

输入的第一行包含两个整数 nn 和 cc(2≤n≤2⋅1052 \le n \le 2 \cdot 10^5,1≤c≤10001 \le c \le 1000)—— 分别表示大楼的楼层数以及电梯运行的时间开销。

输入的第二行包含 n−1n - 1 个整数 a1,a2,…,an−1a_1, a_2, \dots, a_{n-1}(1≤ai≤10001 \le a_i \le 1000),其中 aia_i 表示使用楼梯从第 ii 层前往第 (i+1)(i+1) 层(或从第 (i+1)(i+1) 层返回第 ii 层)所需的时间。

输入的第三行包含 n−1n - 1 个整数 b1,b2,…,bn−1b_1, b_2, \dots, b_{n-1}(1≤bi≤10001 \le b_i \le 1000),其中 bib_i 表示使用电梯从第 ii 层前往第 (i+1)(i+1) 层(或从第 (i+1)(i+1) 层返回第 ii 层)所需的时间。

输出格式

Print nn integers t1,t2,…,tnt_1, t_2, \dots, t_n, where tit_i is the minimum total time to reach the ii-th floor from the first floor if you can perform as many moves as you want.

输出 nn 个整数 t1,t2,…,tnt_1, t_2, \dots, t_n,其中 tit_i 表示从第 11 层到达第 ii 层所需的最小总时间(允许执行任意多次移动)。

输入输出样例

  • 输入#1

    10 2
    7 6 18 6 16 18 1 17 17
    6 9 3 10 9 1 10 1 5

    输出#1

    0 7 13 18 24 35 36 37 40 45
  • 输入#2

    10 1
    3 2 3 1 3 3 1 4 1
    1 2 3 4 4 1 2 1 3

    输出#2

    0 2 4 7 8 11 13 14 16 17

输入解题思路,AI测评打分。不知道怎么写?

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