Submission #1016760

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016760		amine_aroua	Homework (CEOI22_homework)	C++17	0 / 100	332 ms	524288 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int n;
map<string  , int> comma;
pair<int , int> solve(string s)
{
    pair<int ,int> ret = {1e9 , -1e9};
    if(s[0] == '?')
    {
       return {1 , n};
    }
    int pos = comma[s];
    string a = s.substr(4, pos - 4);
    string b = s.substr(pos + 1 , (int)s.size() - 2 - pos);
    pair<int ,int> va = solve(a) , vb = solve(b);
    if(s[1] == 'a')
    {
        if(va.first +1 <= vb.second)
        {
            ret.first = min(ret.first , va.first + 1);
            ret.second = max(ret.second , vb.second);
        }
        if(vb.first + 1 <= va.second)
        {
            ret.first = min(ret.first , vb.first + 1);
            ret.second = max(ret.second , va.second);
        }
    }
    else
    {
        if(vb.first <= va.second - 1)
        {
            ret.first = min(ret.first , vb.first);
            ret.second = max(ret.second , va.second - 1);
        }
        if(va.first <= vb.second - 1)
        {
            ret.first = min(ret.first , va.first);
            ret.second = max(ret.second , vb.second - 1);
        }
    }
    return ret;
}
int main()
{
    string s;
    cin>>s;
    n = 0;
    for(auto c : s)
        n+=c=='?';
    stack<int> st;
    vector<int> pos((int)s.size());
    for(int i = 0 ; i < (int)s.size() ; i++)
    {
        if(s[i] == '(')
            st.push(i);
        if(s[i] == ',')
        {
            pos[st.top()] = i - st.top() + 3;
        }
        if(s[i] == ')')
        {
            string t = s.substr(st.top() - 3 , i - st.top() + 4);
            comma[t] = pos[st.top()];
            st.pop();
        }
    }
    pair<int ,int> final = solve(s);
    cout<<final.second - final.first<<'\n';
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 13
• Subtask 3: 0 / 13
• Subtask 4: 0 / 30
• Subtask 5: 0 / 34