#include<bits/stdc++.h> using namespace std; int i,j,a; int su(int i){ int a=2; while(a<i){ if(i%a==0){ return 0; } a++; } return 1; } int main(){ for(i=6;i<=100;i+=2){ for(j=2;j<i;j++){ if(su(j)==1&&su(i/j)==1){ cout<<"It's a Tongtong number."; return 0; } } } cout<<"It's not a Tongtong number."; }