Masa - mai fain

#include <bits/stdc++.h>

using namespace std;

ifstream fin("masa.in");
ofstream fout("masa.out");

map<char, int> m;
string s;

int rezolvare()
{
    stack<int> v;
    v.push(0);

    for(int i = 0; i < s.length(); i++)
    {
        if(isalpha(s[i]))
        {
            int val_st = v.top();
            v.pop();

            int nr = m[s[i]];

            if(isdigit(s[i+1]))
            {
                i++;
                v.push(val_st + (nr * (s[i]-'0')));
            }
            else
            {
                v.push(val_st + nr);
            }
        }
        else if(s[i] == '(')
        {
            v.push(0);
        }
        else if(s[i] == ')')
        {
            int top = v.top();
            v.pop();
            int val_st = v.top();
            v.pop();

            if(isdigit(s[i+1]))
            {
                i++;
                v.push(val_st + (top * (s[i] - '0')));
            }
            else
            {
                v.push(val_st + top);
            }
        }
    }
    return v.top();
}

int main()
{
    getline(fin, s);
    m['C'] = 12;
    m['O'] = 16;
    m['H'] = 1;

    int i = 0;
    fout << rezolvare();

    return 0;
}