Submission #1475089

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define all(a) (a).begin(),(a).end()
#define pb emplace_back
#define INF (1e9+1)

int main(){
    string s;
    cin>>s;
    
    int stk = 0;
    int ans = 0;
    rep(i,s.size()){
        if(s[i]=='S'){
            stk++;
        }else{
            if(stk==0)ans++;
            else stk--;
        }
    }
    cout<<ans+stk<<endl;
}

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