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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. #include <string>
  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 num){
  22. 	vector<pair<int,string>> mapping{
  23. 		{1000,"M"},{500,"D"},
  24. 		{100,"C"},{50,"L"},
  25. 		{10,"X"},{5,"V"},
  26. 		{4,"VI"},{1,"I"}
  27. 	};
  28.  
  29. 	string res="";
  30.  
  31. 	for(const auto & [value,sym]:mapping){
  32. 		if(num==0){
  33. 			break;
  34. 		}
  35. 		while(num>=value){
  36. 			res+=sym;
  37. 			num-=value;
  38. 		}
  39.  
  40. 	}
  41.  
  42. 	return res;
  43.  
  44. }
  45.  
  46. int main() {
  47. 	int intNum = 0;
  48. 	cin >> intNum;
  49. 	cout << roman(intNum);
  50. 	return 0;
  51. }
Success #stdin #stdout 0s 5284KB
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https://ideone.com/twD74Z
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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