2124. Check if All A's Appears Before All B's.cpp

class Solution {
public:
    bool checkString(string s) {
        int flag=0;
        for(int i=0;i<s.length();i++)
        {
            if(s[i]=='b')
                flag=1;
            
            if(flag==1)
                if(s[i]=='a')
                    return false;
        }
        return true;
    }
};