A9599 | Design Tutorial: Learn from Math
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题目描述
One way to create a task is to learn from math. You can generate some random math statement or modify some theorems to get something new and build a new task from that.
For example, there is a statement called the "Goldbach's conjecture". It says: "each even number no less than four can be expressed as the sum of two primes". Let's modify it. How about a statement like that: "each integer no less than 12 can be expressed as the sum of two composite numbers." Not like the Goldbach's conjecture, I can prove this theorem.
You are given an integer $n$ no less than 12, express it as a sum of two composite numbers.
For example, there is a statement called the "Goldbach's conjecture". It says: "each even number no less than four can be expressed as the sum of two primes". Let's modify it. How about a statement like that: "each integer no less than 12 can be expressed as the sum of two composite numbers." Not like the Goldbach's conjecture, I can prove this theorem.
You are given an integer $n$ no less than 12, express it as a sum of two composite numbers.
输入格式
The only line contains an integer $n$ $(12<=n<=10^{6})$ .
输出格式
Output two composite integers $x$ and $y$ $(1<x,y<n)$ such that $x+y=n$ . If there are multiple solutions, you can output any of them.
输入输出样例
输入 #1
12
输出 #1
4 8
输入 #2
15
输出 #2
6 9
输入 #3
23
输出 #3
8 15
输入 #4
1000000
输出 #4
500000 500000
In the first example, 12 = 4 + 8 and both 4, 8 are composite numbers. You can output "6 6" or "8 4" as well.
In the second example, 15 = 6 + 9. Note that you can't output "1 14" because 1 is not a composite number.
In the second example, 15 = 6 + 9. Note that you can't output "1 14" because 1 is not a composite number.
C++ 编辑器
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你好,我是作答助手。可以问思路、复杂度、样例含义或代码报错原因;不会直接给出完整 AC 代码。
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评测结果:Accepted