Create 0013 Roman to Integer

rafat170 · Feb 24, 2023 · 28d51ff · 28d51ff
1 parent 78f714d
commit 28d51ff
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/java/0013 Roman to Integer b/java/0013 Roman to Integer
@@ -0,0 +1,22 @@
+class Solution {
+ public int romanToInt(String s) {
+ HashMap<Character, Integer> map = new HashMap();
+ map.put('I', 1);
+ map.put('V' ,5);
+ map.put('X' ,10);
+ map.put('L' ,50);
+ map.put('C' ,100);
+ map.put('D' ,500);
+ map.put('M' ,1000);
+
+ int result = 0;
+ for(int i=0; i < s.length(); i++){
+ if (i > 0 && map.get(s.charAt(i)) > map.get(s.charAt(i-1))) {
+ result += map.get(s.charAt(i)) - 2*map.get(s.charAt(i-1));
+ } else {
+ result += map.get(s.charAt(i));
+ }
+ }
+ return result;
+}
+}