# include <iostream>
# include <cstring>
using namespace std;

bool p[100010];

void getprime()
{
    memset(p, true, sizeof(p));
    p[0] = p[1] = false;
    for (int i = 2; i <= 40000; i++)
    {
        if (p[i])
        {
            for (int j = 2; i * j <= 40000; j++)
            {
                p[i * j] = false;
                break;
            }
        }
    }
    return;
}

int main()
{
    getprime();
    int n;
    cin >> n;
    for (int i = 2; i <= n; i += 2)
    {
        for (int j = 2; j <= n / 2; i++)
        {
            for (int k = 2; k <= n / 2; k++)
            {
                if (p[j] && p[k]) 
                    cout << i << '=' << j << '+' << k << endl;
            }
        }
    }
    return 0;
}

为什么TLE了