#include <bits/stdc++.h> using namespace std; int n; int m; int cnt; bool pdss(int x) { if (x < 2) { return 0; } bool flag = 1; for (int i = 2; i <= sqrt(x); i++) { if (x % i == 0) { flag = 0; break; } } return flag; } int main() { scanf("%d%d",&m,&n); for (int i = m; m <= n; i++) { if (pdss(i) == 1) { cout << i << " "; cnt++; } } cout << "\n"; printf("%d",cnt); return 0; } 错误的题解！！！