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Submission #956171

# Submission time Handle Problem Language Result Execution time Memory
956171 2024-04-01T08:45:13 Z Nelt Jakarta Skyscrapers (APIO15_skyscraper) C++17
10 / 100
 1 ms 600 KB 
#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;

void solve()
{
    ll n, m;
    cin >> n >> m;
    ll b[m], p[m];
    vector<ll> eq[n];
    for (ll i = 0; i < m; i++)
        cin >> b[i] >> p[i], eq[b[i]].push_back(i);
    vector<ll> g[m];
    for (ll i = 0; i < n; i++)
        for (ll j = 1; j < eq[i].size(); j++)
            g[eq[i][j - 1]].push_back(eq[i][j]);
    map<ll, ll> dist[m];
    dist[0][b[0]] = 0;
    deque<pair<ll, ll>> q;
    q.push_front(make_pair(0, b[0]));
    for (ll j : eq[b[0]])
        dist[j][b[0]] = 0, q.push_back(make_pair(j,b[0]));
    while (!q.empty())
    {
        auto [i, j] = q.front();
        q.pop_front();
        if (j - p[i] >= 0 and (!dist[i].count(j - p[i]) or dist[i][j - p[i]] > dist[i][j] + 1))
            dist[i][j - p[i]] = dist[i][j] + 1, q.push_back(make_pair(i, j - p[i]));
        if (j + p[i] < n and (!dist[i].count(j + p[i]) or dist[i][j + p[i]] > dist[i][j] + 1))
            dist[i][j + p[i]] = dist[i][j] + 1, q.push_back(make_pair(i, j + p[i]));
        if (!eq[j].empty())
        {
            if (!dist[eq[j][0]].count(j) or dist[eq[j][0]][j] > dist[i][j])
                dist[eq[j][0]][j] = dist[i][j];
            if (i != eq[j][0])
                q.push_front(make_pair(eq[j][0], j));
        }
        for (ll k : g[i])
            if (!dist[k].count(j) or dist[k][j] > dist[i][j])
                dist[k][j] = dist[i][j], q.push_front(make_pair(k, j));
    }
    ll best = 1e18;
    for (auto i : dist[1])
        best = min(best, i.second);
    if (best == 1e18)
        best = -1;
    cout << best << endl;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll t = 1;
    // precomp();
    // cin >> t;
    for (ll i = 1; i <= t; i++)
        solve();
    cerr << "\nTime elapsed: " << clock() * 1000.0 / CLOCKS_PER_SEC << " ms\n";
}

Compilation message

skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:16:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         for (ll j = 1; j < eq[i].size(); j++)
      |                        ~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Incorrect 1 ms 360 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 1 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 600 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 456 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Incorrect 0 ms 460 KB Output isn't correct
10 Halted 0 ms 0 KB -