oj.uz

Submission #921898

# Submission time Handle Problem Language Result Execution time Memory
921898 2024-02-04T13:12:07 Z gelastropod Trampoline (info1cup20_trampoline) C++14
100 / 100
 1146 ms 108068 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define in(s, v) (s.lower_bound(v) != s.end() && *s.lower_bound(v) == v)

vector<vector<int>> adjlist, twok;
void dfs(int x, int p)
{
    for (int k = 0; k < 19; k++)
    {
        if (twok[k][x] == -1) break;
        twok[k + 1][x] = twok[k][twok[k][x]];
    }
    for (int i : adjlist[x])
    {
        if (i == p) continue;
        twok[0][i] = x;
        dfs(i, x);
    }
}

int kances(int k, int x)
{
    for (int i = 0; i < 20; i++)
    {
        if (x == -1) break;
        if (k & (1LL << i)) x = twok[i][x];
    }
    return x;
}

signed main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N, R, C, T, a, b, counter = 0, c, d, x;
    cin >> R >> C >> N;
    adjlist = vector<vector<int>>(N, vector<int>());
    twok = vector<vector<int>>(20, vector<int>(N, -1));
    map<int, set<pair<int, int>>> green;
    set<int> visited;
    vector<pair<int, int>> greens;
    vector<int> subroots;
    for (int i = 0; i < N; i++)
    {
        cin >> a >> b;
        a--, b--;
        if (!in(visited, a))
        {
            visited.insert(a);
            green[a] = set<pair<int, int>>();
        }
        green[a].insert(pair<int, int>(b, counter));
        greens.push_back(pair<int, int>(b, a));
        counter++;
    }
    for (auto i : green)
    {
        for (auto j : i.second)
        {
            if (!in(visited, i.first + 1))
            {
                subroots.push_back(j.second);
                continue;
            }
            if (green[i.first + 1].lower_bound(pair<int, int>(j.first, 0)) == green[i.first + 1].end())
            {
                subroots.push_back(j.second);
                continue;
            }
            x = green[i.first + 1].lower_bound(pair<int, int>(j.first, 0))->second;
            adjlist[j.second].push_back(x);
            adjlist[x].push_back(j.second);
        }
    }
    for (int i : subroots) dfs(i, -1);
    cin >> T;
    for (int i = 0; i < T; i++)
    {
        cin >> a >> b >> c >> d;
        a--, b--, c--, d--;
        swap(a, b);
        swap(c, d);
        if (a > c || b > d)
        {
            cout << "No\n";
            continue;
        }
        if (b == d)
        {
            cout << "Yes\n";
            continue;
        }
        if (!in(visited, b))
        {
            cout << "No\n";
            continue;
        }
        if (green[b].lower_bound(pair<int, int>(a, 0)) == green[b].end())
        {
            cout << "No\n";
            continue;
        }
        x = green[b].lower_bound(pair<int, int>(a, 0))->second;
        x = kances(d - b - 1, x);
        if (x == -1)
        {
            cout << "No\n";
            continue;
        }
        cout << (greens[x].first <= c ? "Yes\n" : "No\n");
    }
}

Subtask #1
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 3028 KB 200 token(s): yes count is 21, no count is 179
2 Correct 8 ms 3288 KB 200 token(s): yes count is 70, no count is 130
3 Correct 5 ms 2392 KB 197 token(s): yes count is 25, no count is 172

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 243 ms 61908 KB 4000 token(s): yes count is 99, no count is 3901
2 Correct 277 ms 62516 KB 4000 token(s): yes count is 91, no count is 3909
3 Correct 240 ms 60824 KB 4000 token(s): yes count is 4000, no count is 0
4 Correct 249 ms 61800 KB 4000 token(s): yes count is 1991, no count is 2009

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 371 ms 78628 KB 200000 token(s): yes count is 110486, no count is 89514
2 Correct 387 ms 75060 KB 200000 token(s): yes count is 114664, no count is 85336
3 Correct 400 ms 71984 KB 200000 token(s): yes count is 86232, no count is 113768
4 Correct 475 ms 72064 KB 200000 token(s): yes count is 94603, no count is 105397
5 Correct 521 ms 71988 KB 200000 token(s): yes count is 94148, no count is 105852
6 Correct 714 ms 84312 KB 200000 token(s): yes count is 97163, no count is 102837

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 2136 KB 5000 token(s): yes count is 3238, no count is 1762
2 Correct 7 ms 2140 KB 5000 token(s): yes count is 3837, no count is 1163
3 Correct 9 ms 2652 KB 5000 token(s): yes count is 4104, no count is 896
4 Correct 6 ms 2140 KB 5000 token(s): yes count is 3934, no count is 1066
5 Correct 9 ms 2396 KB 5000 token(s): yes count is 3384, no count is 1616
6 Correct 6 ms 2396 KB 5000 token(s): yes count is 3390, no count is 1610

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1004 ms 87012 KB 200000 token(s): yes count is 171404, no count is 28596
2 Correct 759 ms 75448 KB 200000 token(s): yes count is 161254, no count is 38746
3 Correct 453 ms 72196 KB 200000 token(s): yes count is 117455, no count is 82545
4 Correct 1146 ms 108068 KB 200000 token(s): yes count is 182118, no count is 17882
5 Correct 763 ms 91328 KB 200000 token(s): yes count is 167565, no count is 32435
6 Correct 550 ms 75100 KB 200000 token(s): yes count is 156797, no count is 43203
7 Correct 452 ms 75056 KB 200000 token(s): yes count is 156797, no count is 43203
8 Correct 505 ms 73008 KB 200000 token(s): yes count is 122100, no count is 77900
9 Correct 937 ms 85384 KB 200000 token(s): yes count is 139670, no count is 60330
10 Correct 965 ms 84132 KB 200000 token(s): yes count is 165806, no count is 34194
11 Correct 1112 ms 96368 KB 200000 token(s): yes count is 175646, no count is 24354
12 Correct 427 ms 77984 KB 200000 token(s): yes count is 134695, no count is 65305
13 Correct 436 ms 78512 KB 200000 token(s): yes count is 126733, no count is 73267
14 Correct 568 ms 72652 KB 200000 token(s): yes count is 155290, no count is 44710
15 Correct 429 ms 75824 KB 200000 token(s): yes count is 129674, no count is 70326