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题库练习 Cinema Line

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A9261 | $Cinema Line$

时间限制1s

内存限制256MB

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题目描述

The new "Die Hard" movie has just been released! There are $n$ people at the cinema box office standing in a huge line. Each of them has a single $100$ , $50$ or $25$ ruble bill. A "Die Hard" ticket costs $25$ rubles. Can the booking clerk sell a ticket to each person and give the change if he initially has no money and sells the tickets strictly in the order people follow in the line?

输入格式

The first line contains integer $n$ $(1<=n<=10^{5})$ — the number of people in the line. The next line contains $n$ integers, each of them equals $25$ , $50$ or $100$ — the values of the bills the people have. The numbers are given in the order from the beginning of the line (at the box office) to the end of the line.

输出格式

Print "YES" (without the quotes) if the booking clerk can sell a ticket to each person and give the change. Otherwise print "NO".

输入输出样例

输入 #1

4
25 25 50 50

输出 #1

YES

输入 #2

2
25 100

输出 #2

NO

输入 #3

4
50 50 25 25

输出 #3

NO

C++ 编辑器

输入

输出