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- #include<bits/stdc++.h>
- using namespace std;
- long long int product(long long int n)
- {
- if(n==0)
- return 10;
- if(n==1)
- return 1;
- long long int i,p=1,q=0;
- for(i=9;i>1;i--)
- {
- while(n%i==0){
- q+=(p*i);
- p*=10;
- n/=i;
- }
- }
- if(n==1)
- return q;
- else
- return -1;
- }
- int main()
- {
- long long int n,a;
- cin>>n;
- a=product(n);
- cout<<a<<endl;
- return 0;
- }
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