oj.uz

Submission #589227

# Submission time Handle Problem Language Result Execution time Memory
589227 2022-07-04T10:46:51 Z andrei_boaca Match (CEOI16_match) C++14
100 / 100
 66 ms 55792 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("fast-math")
using namespace std;
typedef pair<int,int> pii;
typedef long long ll;
const int baza=29,invbaza=758620695;
const int mod=1e9+7;
int n;
string s,sol;
vector<char> st;
vector<vector<int>> mypoz[2][27];
unordered_map<int,int> nrm;
int nxt[100005];
int sum[100005];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>s;
    n=s.size();
    s=" "+s;
    if(n%2==1)
    {
        cout<<-1;
        return 0;
    }
    int nr=1;
    ll h=0;
    nrm[h]=1;
    sum[0]=1;
    for(int i=1;i<=n;i++)
    {
        if(!st.empty()&&st.back()==s[i])
        {
            st.pop_back();
            h-=(s[i]-'a'+1);
            h=(1LL*h*invbaza)%mod;
        }
        else
        {
            h=((1LL*h*baza)+s[i]-'a'+1)%mod;
            st.push_back(s[i]);
        }
        if(nrm[h]==0)
        {
            nr++;
            nrm[h]=nr;
        }
        sum[i]=nrm[h];
    }
    for(int i=1;i<=26;i++)
        for(int j=0;j<=1;j++)
            mypoz[j][i].resize(nr+1);
    if(!st.empty())
    {
        cout<<-1;
        return 0;
    }
    for(int i=1;i<=n;i++)
    {
        if(!st.empty()&&st.back()==s[i])
        {
            st.pop_back();
            h-=(s[i]-'a'+1);
            h=(1LL*h*invbaza)%mod;
        }
        else
        {
            h=((1LL*h*baza)+s[i]-'a'+1)%mod;
            st.push_back(s[i]);
        }
        if(nrm[h]==0)
        {
            nr++;
            nrm[h]=nr;
        }
        sum[i]=nrm[h];
        mypoz[i%2][s[i]-'a'+1][sum[i]].push_back(i);
    }
    vector<int> last;
    sol.resize(n+1);
    for(int i=1;i<=n;i++)
    {
        if(sol[i]!=')')
        {
            sol[i]='(';
            int maxpoz=n+1;
            if(!last.empty())
                maxpoz=last.back();
            int par=1-i%2;
            int lit=s[i]-'a'+1;
            int lft=0;
            int rgt=mypoz[par][lit][sum[i-1]].size();
            rgt--;
            int poz=0;
            while(lft<=rgt)
            {
                int mij=(lft+rgt)/2;
                if(mypoz[par][lit][sum[i-1]][mij]<maxpoz)
                {
                    poz=mypoz[par][lit][sum[i-1]][mij];
                    lft=mij+1;
                }
                else
                    rgt=mij-1;
            }
            sol[poz]=')';
            last.push_back(poz);
        }
        else
            last.pop_back();
    }
    for(int i=1;i<=n;i++)
        cout<<sol[i];
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 852 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 852 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 852 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 852 KB Output is correct
8 Correct 3 ms 2900 KB Output is correct
9 Correct 4 ms 3668 KB Output is correct
10 Correct 4 ms 4564 KB Output is correct
11 Correct 5 ms 4564 KB Output is correct
12 Correct 44 ms 38820 KB Output is correct
13 Correct 47 ms 42312 KB Output is correct
14 Correct 57 ms 44140 KB Output is correct
15 Correct 10 ms 1872 KB Output is correct
16 Correct 10 ms 1884 KB Output is correct
17 Correct 31 ms 29100 KB Output is correct
18 Correct 12 ms 2124 KB Output is correct
19 Correct 66 ms 55792 KB Output is correct
20 Correct 41 ms 38660 KB Output is correct
21 Correct 65 ms 54208 KB Output is correct