problem no: 1146A sub id: 128881280 code:

include

include

include

include

include<bits/stdc++.h>

using namespace std;

int main() { string a; int res; cin>>a;

int c=count(a.begin(),a.end(),'a');

int len=a.size(); int val=len-c;

if(val<c) res=val+c; else res=val-c;

cout<<res;

}