上代码：

#include<bits/stdc++.h>
using namespace std;
int a[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97};
int main(){
	int l,t=0,c=0;
	cin>>l;
	while(t<=l){
		t=a[1];
		a[1]=++;
		cout<<t<</n;
		c=c+1;
	}
	cout<<c;
	return 0;
}