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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. long long n;
  4. unordered_map<long long,long long> preim;
  5. void aiko(long long n){
  6. 	preim[0]=preim[1]=1;
  7. 	for(long long i=2;i<=n;i++){
  8. 		if(preim[i]==0){
  9. 			for(long long j=i*i;j<=n;j*=2){
  10. 				preim[j]=1;
  11. 			}
  12. 		}
  13. 	}
  14. }
  15. int main(){
  16. 	ios::sync_with_stdio(false);
  17. 	cin.tie(0),cout.tie(0);
  18. 	cin>>n;
  19. 	aiko(n);
  20. 	for(long long i=2;i<=n;i++){
  21. 		if(preim[i]==0 && n%i==0){
  22. 			long long cnt=1;
  23. 			n/=i;
  24. 			cout<<i;
  25. 			if(n%i==0){
  26. 				cout<<"^";
  27. 				while(n%i==0){
  28. 					n/=i;
  29. 					cnt++;
  30. 				}
  31. 				cout<<cnt;
  32. 			}
  33. 			if(n!=1){
  34. 				cout<<" * ";
  35. 			}
  36. 		}
  37. 	}
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/jjdDTc
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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