Reverse-Vowel.cpp

class Solution 
{
	
public:
    string reverseVowels(string s) 
    {
        int i = 0;
        int j = s.size()-1;
        
        while(i<j)
        {
            bool flag1 = false, flag2 = false;  
            
            if(s[i]=='a' || s[i]=='e' || s[i]=='i' || s[i]=='o' || s[i]=='u' || s[i]=='A' || s[i]=='E' || s[i]=='I' || s[i]=='O' || s[i]=='U')
            flag1 = true;
            
            if(s[j]=='a' || s[j]=='e' || s[j]=='i' || s[j]=='o' || s[j]=='u' || s[j]=='A' || s[j]=='E' || s[j]=='I' || s[j]=='O' || s[j]=='U')
            flag2 = true;
            
            if(flag1 && flag2)  
            {
                swap(s[i],s[j]);
                i++;j--; 
            }
            
            if(!flag1)    
            i++;
            if(!flag2)    
            j--;
        }
        
        return s;
    } 
};