输入：11 101 272

输出：

Yes

Yes

No

#include<fstream>
#include<iostream>
#include<sstream>
#include<string>
#include<cmath>
using namespace std;bool isPrime(int);
bool isSymmetry(int);int main(){ifstream cin("data.txt");int num;while(cin >> num){if(isPrime(num) && isSymmetry(num))cout << "yes" << endl;elsecout << "no" << endl; }return 0;
} bool isPrime(int num){if (num == 1)return false;//1不是素数 for(int i = 2; i <= sqrt(num*1.0); ++i)if(num%i == 0)return false;return true;
}bool isSymmetry(int num){ostringstream oss;oss << num;string s = oss.str();int i = 0;int j = s.length() - 1;bool flag = true;while(i <= j){if(s[i++] != s[j--]){flag = false;break;}}return flag;
}