[Offer收割]编程练习赛12 register

Ended

Participants:1323

Verdict:Accepted
Score:100 / 100
Submitted:2017-04-02 12:09:13

Lang:G++

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#include<iostream> 
#include<stdio.h>
#include <math.h>
#include<iomanip>
using namespace std;
bool ifprime(int n)
{
    for (int i = 2;i <= sqrt(n);i++)
    {
        if (n%i == 0)
        {
            return 0;
        }
    }
    return 1;
}
int main()
{
    int sum;
    cin >> sum;
    for (int i = 2;i <= sum / 2;i++)
    {
        if (ifprime(i) == 1 && ifprime(sum-i) == 1)
        {
            cout << i << " " << sum - i << endl;
            break;
        }
    }
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