Submission #1145923

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145923		VMaksimoski008	Trampoline (info1cup20_trampoline)	C++20	100 / 100	459 ms	40240 KiB

trampoline

#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
const int maxn = 2e5 + 5;

int up[maxn][20];

signed main() {
    ios_base::sync_with_stdio(false);
    cout.tie(0); cin.tie(0);

    int n, m, k; cin >> n >> m >> k;
    vector<int> x(k+2), y(k+2, m+5);
    for(int i=1; i<=k+1; i++)
        for(int j=0; j<20; j++) up[i][j] = k + 1;

    map<int, vector<pii> > mp;
    for(int i=1; i<=k; i++) {
        cin >> x[i] >> y[i];
        mp[x[i]].push_back({ y[i], i });
    }

    for(auto &[r, vec] : mp)
        sort(vec.begin(), vec.end());
    for(auto [r, vec] : mp) {
        for(auto [c, i] : vec) {
            int p = lower_bound(mp[r+1].begin(), mp[r+1].end(), pii{ c, 0 }) - mp[r+1].begin();
            if(p != mp[r+1].size()) up[i][0] = mp[r+1][p].second;
        }
    }

    for(int j=1; j<20; j++)
        for(int i=1; i<=k+1; i++) up[i][j] = up[ up[i][j-1] ][j-1];

    int q; cin >> q;
    while(q--) {
        int tr, tc, br, bc; cin >> tr >> tc >> br >> bc;
        if(tr > br || tc > bc) {
            cout << "No\n";
            continue;
        }

        if(tr == br) {
            cout << "Yes\n";
            continue;
        }

        int jmp = br - tr - 1;
        int p = lower_bound(mp[tr].begin(), mp[tr].end(), pii{ tc, 0 }) - mp[tr].begin();
        if(p == mp[tr].size()) {
            cout << "No\n";
            continue;
        }
        
        int u = mp[tr][p].second;
        for(int j=19; j>=0; j--)
            if(jmp & (1 << j)) u = up[u][j];
        cout << (y[u] <= bc ? "Yes" : "No") << '\n';
    }
}

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