제출 #914701

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
914701		8pete8	괄호 문자열 (CEOI16_match)	C++17	100 / 100	14 ms	23132 KiB

match

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<float.h>
#include<limits.h>
#include <cassert>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric> //gcd(a,b)
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,ll>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
using namespace std;
#define int long long
#define double long double
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
const int mod=1e9+7,mxn=1e5,lg=30,inf=1e18,minf=-1e9,Mxn=100000;
string a;
int n;
int last[mxn+10][27];
string ans;
bool solve(int l,int r){
    if(r<l)return true;
    if(l==-1||r==-1||last[r][a[l]-'a']==-1)return false;
    ans[l]='(';
    ans[last[r][a[l]-'a']]=')';
    if(!solve(l+1,last[r][a[l]-'a']-1))return false;
    if(!solve(last[r][a[l]-'a']+1,r))return false;
    return true;
}
int32_t main(){
    cin>>a;
    n=a.size();
    for(int i=0;i<n;i++){
        for(int j=0;j<=26;j++)last[i][j]=-1;
        for(int j=0;j<=26;j++)if(i&&(last[i-1][a[i]-'a']>0))last[i][j]=last[last[i-1][a[i]-'a']-1][j];
        last[i][a[i]-'a']=i;
    }
    ans.resize(n);
    if(!solve(0,n-1))cout<<-1;
    else cout<<ans;
}

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