Submission #1012779

#TimeUsernameProblemLanguageResultExecution timeMemory
1012779LeonidCukMatch (CEOI16_match)C++17
37 / 100
2056 ms952 KiB
#include <bits/stdc++.h>
using namespace std;
int n;
string s;
bool check(stack<char>st,int l)
{
    for(int i=l;i<n;i++)
    {
        if(st.empty()||st.top()!=s[i])
        {
            st.push(s[i]);
        }
        else if(!st.empty()&&st.top()==s[i])
        {
            st.pop();
        }
    }
    if(!st.empty())
    {
        return false;
    }
    return true;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>s;
    n=s.size();
    stack<char>st;
    string res="";
    for(int i=0;i<n;i++)
    {
        if(st.empty()||st.top()!=s[i])
        {
            res+='(';
            st.push(s[i]);
        }
        else if(!st.empty()&&st.top()==s[i])
        {
            st.push(s[i]);
            if(check(st,i+1))
            {
                res+='(';
            }
            else
            {
                st.pop();
                st.pop();
                res+=')';
            }
        }
    }
    if(!st.empty())
    {
        cout<<"-1";
        return 0;
    }
    cout<<res;
    return 0;
}
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