十分代码qwq或许是什么东西没写。

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n;
	int a[1229],b=0;
	cin >> n;
	int sum = 0;
	for(int i = 2;i <= n;i++){
		for(int j = 1;j <= i;j++){	
			if(i % j == 0)sum++;
		}
		if(sum <= 2){
			sum = 0;
			a[b] = i;
			b++;
		}else sum = 0;
	}
	int max = b;
	b = 0;
	for(int i = 4;i <= n;i=i+2){
		cout << i << "=" << i-a[b] << "+" << a[b] << endl;
		b++;
	}
	return 0;
}