Submission #1133865

#	Time	Username	Problem	Language	Result	Execution time	Memory
1133865		huoi	Trampoline (info1cup20_trampoline)	C++17	54 / 100	396 ms	36424 KiB

trampoline

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define INF 9e18
#define N 200005

void solve() {
    int r, c, n;
    cin >> r >> c >> n;

    vector<pair<int, int>> green(n);
    for (int i = 0; i < n; i++) {
        cin >> green[i].first >> green[i].second;
    }

    sort(green.begin(), green.end());
    vector<vector<int>> up(20, vector<int>(n, -1));

    for (int i = 0; i < n; i++) {
        auto it = lower_bound(green.begin(), green.end(), make_pair(green[i].first + 1, green[i].second));
        if (it == green.end()) continue;
        int ni = it - green.begin();
        if (green[ni].first != green[i].first + 1) continue;
        up[0][i] = it - green.begin();
    }

    for (int k = 1; k < 20; k++) {
        for (int i = 0; i < n; i++) {
            if (up[k - 1][i] != -1) {
                up[k][i] = up[k - 1][up[k - 1][i]];
            }
        }
    }

    int q;
    cin >> q;
    while (q--) {
        int r1, c1, r2, c2;
        cin >> r1 >> c1 >> r2 >> c2;

        if (r1 > r2) {
            cout << "No\n";
            continue;
        }

        auto it = lower_bound(green.begin(), green.end(), make_pair(r1, c1));

        if (it == green.end() || it->first > r1) {
            if (r1 == r2 && c1 <= c2) cout << "Yes\n";
            else cout << "No\n";
            continue;
        }

        int i = it - green.begin();
        for (int k = 19; k >= 0; k--) {
            if (up[k][i] == -1) continue;
            int ni = up[k][i];
            if (green[ni].first < r2) {
                i = ni;
            }
        }

        cout << (((green[i].first == r2 || green[i].first == r2 - 1) && green[i].second <= c2) ? "Yes\n" : "No\n");
    }
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    solve();
    return 0;
}

• Subtask 1: 23 / 23
• Subtask 2: 20 / 20
• Subtask 3: 11 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 27