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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. long long gcd(long long a, long long b){
  4. 	return (b == 0)? a: gcd(b, a%b);
  5. }
  6. int main()
  7. {
  8. 	int t;
  9. 	cin>>t;
  10. 	while(t--){
  11. 		long long n;
  12. 		cin>>n;
  13. 		vector<long long> v(n), co(n);
  14. 		for(int x = 0; x <n; x++)
  15. 			cin>>v[x];
  16. 		int cnt = 0;
  17. 		for(int x = 0; x< n; x++){
  18. 			if(co[x]) continue;
  19. 			for(int y = x; y < n; y++){
  20. 				if(!co[y] && gcd(v[x], v[y]) > 1)
  21. 					co[y] = cnt;
  22. 			}
  23. 			co[x] = ++cnt;
  24. 		}
  25. 		cout<<cnt<<endl;
  26. 		for(int i = 0; i < n; i++){
  27. 			cout<<co[i]<<" ";
  28. 		}
  29. 		cout<<endl;
  30. 	}
  31.  
  32. 	return 0;
  33. }
  34.  
Success #stdin #stdout 0s 5520KB
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https://ideone.com/uKkSIq
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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