15.md

Largest Odd Number in a String

string largestOddNumber(string num) {
       int r=-1;
       for(int i=num.size()-1;i>=0;i--)
       {
           if(int(num[i])%2!=0)
           {
               r=i;
               break;
           } 
       } 
       if(r==-1)return "";
       string ans="";
       for(int i=0; i<=r ;i++)
            ans+=num[i];
       return ans;
    }

 string largestOddNumber(string num) {
       int r=-1;
       for(int i=num.size()-1;i>=0;i--)
       {
           if(int(num[i])%2!=0)
           {
               //r=i;
               return num.substr(0,i+1);
           } 
       } 
       return "";
    
    }