题解 | 好串

#include<bits/stdc++.h>
using namespace std;
int main(){
    string s;
    cin>>s;
    s=' '+s;
    int sum1=0;
    int num=0;
for(int i=1;i<=s.size()-1;i++){
    if(s[i]=='a'){
        sum1=sum1+1;
    }if(s[i]=='b'){
        num=num+1;
    }if(sum1<num){
        cout<<"Bad";
        return 0;
    }
}
if(sum1==num) {
    cout<<"Good";
}else{
    cout<<"Bad";
}
   
  return 0;
}