@PracticalMetal create math folder and add Roman to Integer

Contributors.md

@@ -24,3 +24,5 @@ Welcome to the list of people who contributed to this repo 💥
 7. [Ayansh](https://github.com/badasschef)
 8. [Deep](https://github.com/deep846)
 9. [Amit](https://github.com/amitShindeGit)
+10. [Pulkit](https://github.com/practicalmetal)
+

Math/Roman_To_Integer/CPP/Roman_To_Integer.cpp

@@ -0,0 +1,41 @@
+class Solution {
+public:
+    int romanToInt(string s) {
+        int roman[256],sum=0;
+        roman['I']=1;
+        roman['V']=5;
+        roman['X']=10;
+        roman['L']=50;
+        roman['C']=100;
+        roman['D']=500;
+        roman['M']=1000;
+
+        int i=0;
+        while(i<s.size())
+        {
+            int countOfDuplicate=1;
+            while(s[i]==s[i+1])
+            {
+                countOfDuplicate++;
+                i++;
+            }
+            if(i==s.size()-1)
+            {
+                sum+=countOfDuplicate*roman[s[i]];
+                return sum;
+            }
+            else if(roman[s[i]]<roman[s[i+1]])
+            {
+                sum+=roman[s[i+1]]-(countOfDuplicate*roman[s[i]]);
+                i+=2;
+            }
+            else
+            {
+                sum+=(countOfDuplicate*roman[s[i]]);
+                i+=1;
+            }
+
+        }
+        return sum;
+    }
+};