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- #include<bits/stdc++.h>
- using namespace std;
- typedef long long ll;
- ll ans(int n)
- {
- if(n==0) return 10;
- if(n==1) return 1;
- ll res=0,temp=1;
- for(int i=9;i>=2;i--)
- {
- while(n%i==0)
- {
- n/=i;
- res+=temp*i;
- temp*=10;
- }
- }
- if(n!=1) return -1;
- return res;
- }
- int main()
- {
- int t,n;
- cin>>n;
- printf("%d\n",ans(n));
- return 0;
- }
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