oj.uz

Submission #802446

# Submission time Handle Problem Language Result Execution time Memory
802446 2023-08-02T12:18:03 Z SamAnd Fountain Parks (IOI21_parks) C++17
5 / 100
 1173 ms 231608 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define m_p make_pair
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
const int N = 200005;

int n;
vector<int> g[N];

bool c[N];
void dfs(int x)
{
    c[x] = true;
    for (int i = 0; i < g[x].size(); ++i)
    {
        int h = g[x][i];
        if (c[h])
            continue;
        dfs(h);
    }
}

vector<pair<int, int> > rs;
vector<int> gg[N * 2], gi[N * 2];
void dfs(int x, vector<int>& a, vector<int>& b)
{
    c[x] = true;
    for (int i = 0; i < gg[x].size(); ++i)
    {
        int h = gg[x][i];
        if (a[gi[x][i]] == -1)
        {
            a[gi[x][i]] = rs[x].fi;
            b[gi[x][i]] = rs[x].se;
        }
        if (!c[h])
            dfs(h, a, b);
    }
}

int construct_roads(std::vector<int> x, std::vector<int> y) {
    std::vector<int> u, v, a, b;

    n = sz(x);
    vector<pair<int, int> > p;
    map<pair<int, int>, int> mp;
    for (int i = 0; i < n; ++i)
    {
        p.push_back(m_p(x[i], y[i]));
        mp[m_p(x[i], y[i])] = i;
    }

    int z = 0;
    map<pair<int, int>, int> s;
    for (int i = 0; i < n; ++i)
    {
        int x = p[i].fi;
        int y = p[i].se;
        if (mp.find(m_p(x + 2, y)) != mp.end())
        {
            u.push_back(mp[m_p(x, y)]);
            v.push_back(mp[m_p(x + 2, y)]);
            if (s.find(m_p(x + 1, y + 1)) == s.end())
                s[m_p(x + 1, y + 1)] = z++;
            if (s.find(m_p(x + 1, y - 1)) == s.end())
                s[m_p(x + 1, y - 1)] = z++;
            g[u.back()].push_back(v.back());
            g[v.back()].push_back(u.back());
            gg[s[m_p(x + 1, y + 1)]].push_back(s[m_p(x + 1, y - 1)]);
            gg[s[m_p(x + 1, y - 1)]].push_back(s[m_p(x + 1, y + 1)]);
            gi[s[m_p(x + 1, y + 1)]].push_back(sz(u) - 1);
            gi[s[m_p(x + 1, y - 1)]].push_back(sz(u) - 1);
        }
        if (mp.find(m_p(x, y + 2)) != mp.end())
        {
            u.push_back(mp[m_p(x, y)]);
            v.push_back(mp[m_p(x, y + 2)]);
            if (s.find(m_p(x + 1, y + 1)) == s.end())
                s[m_p(x + 1, y + 1)] = z++;
            if (s.find(m_p(x - 1, y + 1)) == s.end())
                s[m_p(x - 1, y + 1)] = z++;
            g[u.back()].push_back(v.back());
            g[v.back()].push_back(u.back());
            gg[s[m_p(x + 1, y + 1)]].push_back(s[m_p(x - 1, y + 1)]);
            gg[s[m_p(x - 1, y + 1)]].push_back(s[m_p(x + 1, y + 1)]);
            gi[s[m_p(x + 1, y + 1)]].push_back(sz(u) - 1);
            gi[s[m_p(x - 1, y + 1)]].push_back(sz(u) - 1);
        }
    }

    rs.assign(sz(s), m_p(0, 0));
    for (auto it = s.begin(); it != s.end(); ++it)
    {
        rs[it->se] = it->fi;
    }

    dfs(0);
    for (int i = 0; i < n; ++i)
    {
        if (!c[i])
            return 0;
    }

    memset(c, false, sizeof c);
    a.assign(sz(u), -1);
    b.assign(sz(u), -1);
    for (int i = 0; i < z; ++i)
    {
        if (!c[i])
        {
            dfs(i, a, b);
        }
    }

    build(u, v, a, b);
    return 1;
}

Compilation message

parks.cpp: In function 'void dfs(int)':
parks.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for (int i = 0; i < g[x].size(); ++i)
      |                     ~~^~~~~~~~~~~~~
parks.cpp: In function 'void dfs(int, std::vector<int>&, std::vector<int>&)':
parks.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i = 0; i < gg[x].size(); ++i)
      |                     ~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23892 KB Output is correct
2 Correct 13 ms 23924 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 12 ms 23980 KB Output is correct
5 Correct 12 ms 23916 KB Output is correct
6 Correct 12 ms 23792 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 13 ms 23748 KB Output is correct
9 Correct 452 ms 72604 KB Output is correct
10 Correct 31 ms 28928 KB Output is correct
11 Correct 167 ms 50304 KB Output is correct
12 Correct 42 ms 31388 KB Output is correct
13 Correct 113 ms 42800 KB Output is correct
14 Correct 14 ms 24120 KB Output is correct
15 Correct 16 ms 24592 KB Output is correct
16 Correct 484 ms 70812 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23892 KB Output is correct
2 Correct 13 ms 23924 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 12 ms 23980 KB Output is correct
5 Correct 12 ms 23916 KB Output is correct
6 Correct 12 ms 23792 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 13 ms 23748 KB Output is correct
9 Correct 452 ms 72604 KB Output is correct
10 Correct 31 ms 28928 KB Output is correct
11 Correct 167 ms 50304 KB Output is correct
12 Correct 42 ms 31388 KB Output is correct
13 Correct 113 ms 42800 KB Output is correct
14 Correct 14 ms 24120 KB Output is correct
15 Correct 16 ms 24592 KB Output is correct
16 Correct 484 ms 70812 KB Output is correct
17 Incorrect 13 ms 23904 KB Tree @(3, 3) appears more than once: for edges on positions 1 and 2
18 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23892 KB Output is correct
2 Correct 13 ms 23924 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 12 ms 23980 KB Output is correct
5 Correct 12 ms 23916 KB Output is correct
6 Correct 12 ms 23792 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 13 ms 23748 KB Output is correct
9 Correct 452 ms 72604 KB Output is correct
10 Correct 31 ms 28928 KB Output is correct
11 Correct 167 ms 50304 KB Output is correct
12 Correct 42 ms 31388 KB Output is correct
13 Correct 113 ms 42800 KB Output is correct
14 Correct 14 ms 24120 KB Output is correct
15 Correct 16 ms 24592 KB Output is correct
16 Correct 484 ms 70812 KB Output is correct
17 Incorrect 13 ms 23904 KB Tree @(3, 3) appears more than once: for edges on positions 1 and 2
18 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23892 KB Output is correct
2 Correct 13 ms 23924 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 12 ms 23980 KB Output is correct
5 Correct 12 ms 23916 KB Output is correct
6 Correct 12 ms 23792 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 13 ms 23748 KB Output is correct
9 Correct 452 ms 72604 KB Output is correct
10 Correct 31 ms 28928 KB Output is correct
11 Correct 167 ms 50304 KB Output is correct
12 Correct 42 ms 31388 KB Output is correct
13 Correct 113 ms 42800 KB Output is correct
14 Correct 14 ms 24120 KB Output is correct
15 Correct 16 ms 24592 KB Output is correct
16 Correct 484 ms 70812 KB Output is correct
17 Correct 12 ms 23896 KB Output is correct
18 Correct 11 ms 23900 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Incorrect 956 ms 101572 KB Tree @(192371, 7633) appears more than once: for edges on positions 0 and 1
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23892 KB Output is correct
2 Correct 13 ms 23924 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 12 ms 23980 KB Output is correct
5 Correct 12 ms 23916 KB Output is correct
6 Correct 12 ms 23792 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 13 ms 23748 KB Output is correct
9 Correct 452 ms 72604 KB Output is correct
10 Correct 31 ms 28928 KB Output is correct
11 Correct 167 ms 50304 KB Output is correct
12 Correct 42 ms 31388 KB Output is correct
13 Correct 113 ms 42800 KB Output is correct
14 Correct 14 ms 24120 KB Output is correct
15 Correct 16 ms 24592 KB Output is correct
16 Correct 484 ms 70812 KB Output is correct
17 Runtime error 1173 ms 231608 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23892 KB Output is correct
2 Correct 13 ms 23924 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 12 ms 23980 KB Output is correct
5 Correct 12 ms 23916 KB Output is correct
6 Correct 12 ms 23792 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 13 ms 23748 KB Output is correct
9 Correct 452 ms 72604 KB Output is correct
10 Correct 31 ms 28928 KB Output is correct
11 Correct 167 ms 50304 KB Output is correct
12 Correct 42 ms 31388 KB Output is correct
13 Correct 113 ms 42800 KB Output is correct
14 Correct 14 ms 24120 KB Output is correct
15 Correct 16 ms 24592 KB Output is correct
16 Correct 484 ms 70812 KB Output is correct
17 Incorrect 13 ms 23904 KB Tree @(3, 3) appears more than once: for edges on positions 1 and 2
18 Halted 0 ms 0 KB -