all_code_gen.cpp

/* 2. Randomly generate all code of four digit no with 
        unit as a fibboniccai no & prime no
        tenth & hundred place difference as 2
 */
#include <bits/stdc++.h>
using namespace std;

int arr[]={2,3,5};

void code_gen(){
    for(int i=1000;i<9999;i++){
        int d1,d2,d3,d4;
        d1=i%10;
        d2=(i/10)%10;
        d3=(i/100)%10;
        d4=(i/1000)%10;
        set<int>s;
        s.insert(d1);
        s.insert(d2);
        s.insert(d3);
        s.insert(d4);
        // check all digit are distinct
        if(s.size()!=4){
            continue;
        }
        // check original condition
        if(d1==2 || d1==3 || d1==5){
            if(d3-d2==2 && d4-d3==2){
                cout<<i<<"\n";
            }
        }
    }
}

int main(){
    code_gen();
    return 0;
}