#include <bits/stdc++.h> using namespace std; int main() { for(int i = 10;i <= 1000;i++) { bool flag = true; int s = 0; if(i < 100) { int ge = 0,shi = 0; ge = i % 10; shi = i / 10 % 10; s = ge * 10 + shi; } else { int ge = 0,shi = 0,bai = 0; ge = i % 10; shi = i / 10 % 10; bai = i / 100; s = ge * 100 + shi * 10 + bai; } if(i - s == 0) { for(int j = 2;j * j < i;j++) { if(i % j == 0) { flag = false;break; } } if(flag == true) { cout<<i<<endl; } } } return 0; }