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  1. #include <iostream>
  2. #include <string>
  3. #include <bits/stdc++.h>
  4. using namespace std;
  5.  
  6. /**
  7. Convert decimal number lying between 1-3999 to roman numerals
  8.  
  9. SYMBOL       VALUE
  10. I             1
  11. II			  2
  12. III			  3
  13. IV            4
  14. V             5
  15. X             10
  16. L             50
  17. C             100
  18. D             500
  19. M             1000     
  20. **/
  21. string roman(int n){
  22. 	vector<int> num={1,4,5,9,10,40,50,90,100,400,500,900,1000};
  23. 	vector<string> romann={"I","IV","V","IX","X","XC","L","XC","C","CD","D","CM","M"};
  24. 	int i=12;
  25. 	string ans="";
  26. 	while(n>0){
  27. 		int div=n/num[i];
  28. 		n=n%num[i];
  29.  
  30. 		while(div--){
  31. 			ans+=romann[i];
  32. 		}
  33. 		i--;
  34. 	}
  35. 	return ans;
  36. }
  37.  
  38. int main() {
  39. 	int intNum = 0;
  40. 	cin >> intNum;
  41. 	cout << roman(intNum);
  42. 	return 0;
  43. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
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3999
stdout
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MMMCMXCIX
https://ideone.com/ahWmc9
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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