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Roman to Integer in java #5

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Roman to Integer in java #5

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22 changes: 22 additions & 0 deletions Roman to Integer - Leetcode 13/Roman to Integer
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
class Solution {
public int romanToInt(String s) {
Map<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=map.get(s.charAt(s.length()-1));
for(int i=s.length()-2;i>=0;i--){
if(map.get(s.charAt(i)) < map.get(s.charAt(i+1))){
result-=map.get(s.charAt(i));
}else{
result+=map.get(s.charAt(i));
}
}
return result;
}
}