A12843 | Zero Array
时间限制1s
内存限制256MB
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题目描述
You are given an array $a_1, a_2, \ldots, a_n$ .
In one operation you can choose two elements $a_i$ and $a_j$ ( $i \ne j$ ) and decrease each of them by one.
You need to check whether it is possible to make all the elements equal to zero or not.
In one operation you can choose two elements $a_i$ and $a_j$ ( $i \ne j$ ) and decrease each of them by one.
You need to check whether it is possible to make all the elements equal to zero or not.
输入格式
The first line contains a single integer $n$ ( $2 \le n \le 10^5$ ) — the size of the array.
The second line contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^9$ ) — the elements of the array.
The second line contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1 \le a_i \le 10^9$ ) — the elements of the array.
输出格式
Print "YES" if it is possible to make all elements zero, otherwise print "NO".
输入输出样例
输入 #1
4 1 1 2 2
输出 #1
YES
输入 #2
6 1 2 3 4 5 6
输出 #2
NO
In the first example, you can make all elements equal to zero in $3$ operations:
- Decrease $a_1$ and $a_2$ ,
- Decrease $a_3$ and $a_4$ ,
- Decrease $a_3$ and $a_4$
In the second example, one can show that it is impossible to make all elements equal to zero.
- Decrease $a_1$ and $a_2$ ,
- Decrease $a_3$ and $a_4$ ,
- Decrease $a_3$ and $a_4$
In the second example, one can show that it is impossible to make all elements equal to zero.
C++ 编辑器
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输出
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评测结果：Accepted