Submission #1117637

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117637		vjudge1	괄호 문자열 (CEOI16_match)	C++17	0 / 100	2 ms	336 KiB

match

/*
#ifndef ONLINE_JUDGE
#include "AkbarKING.h" // aska geldi akbarking.h
#else
#define debug(...)
#define debugArr(...)
#define debugG(...)
#endif
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/hash_policy.hpp>

#define int long long
#define $AzH_TxdmN$ ios_base::sync_with_stdio(0);cin.tie(nullptr);cout.tie(nullptr);
#pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx,tune=native")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("fast-math")

#define ep emplace_back
#define pb push_back
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()

using namespace std;
using namespace __gnu_pbds;

template <typename T>
using __indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T>
using __indexed_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int sz = 3e5+9;
const int LOG = 63;
const int MOD = 1e9+7;
const int INF = 1e18;
int sdp[sz];

string s;

bool check(const string &str)
{
    if (count(all(str),'#') > 0)
    {
        return 0;
    }
    stack<int>st;
    for (char ch : str)
    {
        if (ch != ')')
        {
            st.push(ch);
        }
        else
        {
            if (!st.empty() && (ch == ')' && st.top() == '('))
            {
                st.pop();
            }
            else
            {
                return 0;
            }
        }
    }
    if ((int)st.size() != 0)
    {
        return 0;
    }
    for (int i = 0; i < (int)str.size(); ++i)
    {
        array<int, 2> Q = {i, sdp[i]};
        if (Q[0] > Q[1])        swap(Q[0],Q[1]);
        ++Q[0];
        if (Q[0] > Q[1])        swap(Q[0],Q[1]);
        /// cout << i << " -> " << (Q[1] - Q[0]) << "\n";
        if ((Q[1] - Q[0]) & 1)
        {
            return 0;
        }
    }
    return 1;
}

void solve()
{
    cin>>s;
    map<char, set<int> >dp;
    for (int i = 0; i < (int)s.length(); ++i)
    {
        dp[s[i]].insert(i);
    }
    for (auto &x : dp)
    {
        if (((int)x.second.size()) & 1)
        {
            cout<<"-1\n";
            return;
        }
    }
    if((int)s.length() & 1)
    {
        cout<<"-1\n";
        return;
    }
    string res((int)s.length(),'#');
    for (int i = 0; i < (int)s.length(); ++i)
    {
        if (res[i] == '#')
        {
            sdp[i] = *dp[s[i]].rbegin();
            sdp[sdp[i]] = i;
            res[i] = '(';
            res[sdp[i]] = ')';
            dp[s[i]].erase(*dp[s[i]].rbegin());
            dp[s[i]].erase(*dp[s[i]].begin());
        }
    }
    cout<<(check(res) ? res : "-1")<<'\n';
}

signed main()
{
    $AzH_TxdmN$
    freopen("match.in", "r", stdin);
    freopen("match.out", "w", stdout);
    int t = 1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

Compilation message (stderr)

match.cpp: In function 'int main()':
match.cpp:128:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  128 |     freopen("match.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
match.cpp:129:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  129 |     freopen("match.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63