Submission #476130

#	Time	Username	Problem	Language	Result	Execution time	Memory
476130		Blobo2_Blobo2	Match (CEOI16_match)	C++14	100 / 100	15 ms	12048 KiB

match

/*
Editor: Abdelrahman Hossam
Nickname: Blobo2_Blobo2
IOI next year isA :)
*/
/*#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-funroll-all-loops,-fpeel-loops,-funswitch-loops")*/

#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define endl "\n"
#define all(v)  v.begin(),v.end()
#define gen(arr,n,nxt)  generate(arr,arr+n,nxt)
#define Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty ios_base::sync_with_stdio(false);cin.tie(0);
#define EPS 0.00000001

const int mo=1e9+7,INF=1e18;
int nxt(){int x;cin>>x;return x;}
string s,ans;
vector<int>v[26];
int prv[100001][26];
inline void solve(int l=0,int r = s.size()-1){
    if(l>r)
        return;
    int idxl = l;
    int idxr = prv[r][s[l]-'a'];
    ans[idxl] = '(';
    ans[idxr] = ')';
    solve(idxl+1,idxr-1);
    solve(idxr+1,r);
}
signed main(){
    Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty
    cin>>s;
    int n=s.size();
    for(int i=0;i<n;i++)
        v[s[i]-'a'].push_back(i),ans+='*';
    stack<int>st;
    for(int i=0;i<n;i++){
        if(!st.empty() && st.top() == s[i])st.pop();
        else st.push(s[i]);
    }
    if(st.size()){
        cout<<-1<<endl;
        return 0;
    }
    memset(prv,-1,sizeof prv);
    for(int i=0;i<n;i++){
        prv[i][s[i]-'a'] = i;
        if(!i)continue;
        for(int j=0;j<26;j++){
            if(j == s[i]-'a')continue;
            if(prv[i-1][s[i]-'a']>0)
                prv[i][j] = prv[prv[i-1][s[i]-'a']-1][j];
        }
    }
    /*for(int i=0;i<n;i++){
        cout<<prv[i][0]<<' '<<prv[i][1]<<endl;
    }*/
    solve();
    cout<<ans<<endl;
    return 0;
}

Compilation message (stderr)

match.cpp:21:24: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   21 | const int mo=1e9+7,INF=1e18;
      |                        ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 63 / 63