Created
December 26, 2019 10:46
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12. Integer to Roman
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| class Solution { | |
| func intToRoman(_ num: Int) -> String { | |
| // if statement is faseter than switch statement (-8ms) | |
| switch num { | |
| case 0 : | |
| return "" | |
| case 1000... : | |
| return "M" + intToRoman(num - 1000) | |
| case 900... : | |
| return "CM" + intToRoman(num - 900) | |
| case 500... : | |
| return "D" + intToRoman(num - 500) | |
| case 400... : | |
| return "CD" + intToRoman(num - 400) | |
| case 100... : | |
| return "C" + intToRoman(num - 100) | |
| case 90... : | |
| return "XC" + intToRoman(num - 90) | |
| case 50... : | |
| return "L" + intToRoman(num - 50) | |
| case 40... : | |
| return "XL" + intToRoman(num - 40) | |
| case 10... : | |
| return "X" + intToRoman(num - 10) | |
| case 9... : | |
| return "IX" + intToRoman(num - 9) | |
| case 5... : | |
| return "V" + intToRoman(num - 5) | |
| case 4... : | |
| return "IV" + intToRoman(num - 4) | |
| case 0... : | |
| return "I" + intToRoman(num - 1) | |
| default : | |
| return "" | |
| } | |
| } | |
| } |
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