fascinating-number

// C++ program to implement 
// fascinating number
#include <bits/stdc++.h>
using namespace std;
 
// function to check if number
// is fascinating or not
bool isFascinating(int num)
{
    // frequency count array 
    // using 1 indexing
    int freq[10] = {0};
 
    // obtaining the resultant number
    // using string concatenation
    string val = "" + to_string(num) + 
                      to_string(num * 2) + 
                      to_string(num * 3);
 
    // Traversing the string 
    // character by character
    for (int i = 0; i < val.length(); i++) 
    {
 
        // gives integer value of 
        // a character digit
        int digit = val[i] - '0';
 
        // To check if any digit has
        // appeared multiple times
        if (freq[digit] and digit != 0 > 0)
            return false;
        else
            freq[digit]++;
    }
 
    // Traversing through freq array to
    // check if any digit was missing
    for (int i = 1; i < 10; i++) 
    {
        if (freq[i] == 0)
            return false;
    }
    return true;
}
 
// Driver code
int main()
{
    // Input number
    int num = 192;
 
    // Not a valid number
    if (num < 100)
        cout << "No" << endl;
 
    else
    {
        // Calling the function to 
        // check if input number 
        // is fascinating or not
        bool ans = isFascinating(num);
        if (ans)
            cout << "Yes";
        else
            cout << "No";
    }
}