Submission #922317

#	Time	Username	Problem	Language	Result	Execution time	Memory
922317		maxFedorchuk	Trampoline (info1cup20_trampoline)	C++17	0 / 100	515 ms	77804 KiB

trampoline

#include "bits/stdc++.h"
using namespace std;

const long long MX=5e5+100;

vector < pair < long long , long long > > mas[MX];
set < pair < long long , long long > > ab;
vector < long long > reb[MX];
map < long long , long long > as;

long long r,c,n;

long long uk=0,nm=0;

void cnt() {

    for (auto u: ab) {
        as[u.first - 1]++;
        as[u.first]++;
        as[u.first + 1]++;
    }

    for (auto &u: as) {
        uk++;
        u.second = uk;
    }

    for (auto u: ab) {
        nm++;
        mas[as[u.first]].push_back({u.second, nm});
    }

    for (long long i = 1; i <= uk; i++) {
        nm++;
        mas[i].push_back({c + 1, nm});
    }
}

long long tin[MX],tou[MX];
long long timer=0;

void DFS(long long zar) {
    timer++;
    tin[zar] = timer;

    for (auto u: reb[zar]) {
        DFS(u);
    }

    timer++;
    tou[zar] = timer;
}
void cnt2() {
    for (long long i = 1; i < uk; i++) {
        for (auto u: mas[i]) {
            long long frm = (*lower_bound(mas[i + 1].begin(), mas[i + 1].end(), make_pair(u.first, 0LL))).second;
            reb[frm].push_back(u.second);
        }
    }

    DFS(mas[uk][0].second);
}

void zap() {
    long long x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;

    if (x1 >= x2) {
        cout << (((y1 <= y2) && (x1 == x2)) ? "Yes" : "No") << "\n";
        return;
    }

    if (as.find(x1) == as.end() || as.find(x2 - 1) == as.end()) {
        cout << "No\n";
        return;
    }

    long long rlx1 = as[x1], rlx2 = as[x2 - 1];

    if (y2 < mas[rlx2][0].first) {
        cout << "No\n";
    }

    pair<long long, long long> frb = (*lower_bound(mas[rlx1].begin(), mas[rlx1].end(), make_pair(y1, 0LL)));
    pair<long long, long long> srb = (*(upper_bound(mas[rlx2].begin(), mas[rlx2].end(), make_pair(y2, 0LL))--));

    if (tin[mas[rlx2][0].second] <= tin[frb.second] && tou[frb.second] <= tou[srb.second]) {
        cout << "Yes\n";
    } else {
        cout << "No\n";
    }
}
int main() {
    cin.tie(0);
    ios_base::sync_with_stdio(0);

    cin >> r >> c >> n;

    long long a, b;
    for (long long i = 1; i <= n; i++) {
        cin >> a >> b;
        ab.insert({a, b});
    }

    cnt();
    cnt2();

    long long q;
    cin >> q;

    while (q--) {
        zap();
    }

    return 0;
}

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