AtCoder Beginner Contest 176
翻译中…
Problem Statement
翻译中…
$N$ persons are standing in a row. The height of the $i$-th person from the front is $A_i$.
翻译中…
We want to have each person stand on a stool of some heights - at least zero - so that the following condition is satisfied for every person:
翻译中…
Condition: Nobody in front of the person is taller than the person. Here, the height of a person includes the stool.
翻译中…
Find the minimum total height of the stools needed to meet this goal.
翻译中…
Constraints
翻译中…
$1 \leq N \leq 2\times 10^5$$1 \leq A_i \leq 10^9$- All values in input are integers.
翻译中…
Input
翻译中…
Input is given from Standard Input in the following format:
翻译中…
N
A_1 \ldots A_N翻译中…
Output
翻译中…
Print the minimum total height of the stools needed to meet the goal.
翻译中…
样例
Input #1
5
2 1 5 4 3
Output #1
4
If the persons stand on stools of heights $0$, $1$, $0$, $1$, and $2$, respectively, their heights will be $2$, $2$, $5$, $5$, and $5$, satisfying the condition.
We cannot meet the goal with a smaller total height of the stools.
Input #2
5
3 3 3 3 3
Output #2
0
Giving a stool of height $0$ to everyone will work.
题目信息
题面与样例版权归 AtCoder 及出题人所有；中文翻译由 AI 生成（CI 管线），如有出入请以原文为准。