Submission #1009403

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009403		12345678	Trampoline (info1cup20_trampoline)	C++17	100 / 100	655 ms	56400 KiB

trampoline

#include <bits/stdc++.h>

using namespace std;

const int nx=2e5+5, kx=18;

int r, c, n, q, p[4], pa[nx][kx], x[nx], y[nx];
map<int, set<pair<int, int>>> mp;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>r>>c>>n;
    for (int i=1; i<=n; i++) cin>>x[i]>>y[i], mp[x[i]].insert({y[i], i});
    for (int i=1; i<=n; i++) 
    {
        if (mp.find(x[i]+1)==mp.end()||mp[x[i]+1].lower_bound(make_pair(y[i], 0))==mp[x[i]+1].end()) pa[i][0]=i;
        else pa[i][0]=mp[x[i]+1].lower_bound(make_pair(y[i], 0))->second;
    }
    for (int i=1; i<kx; i++) for (int j=1; j<=n; j++) pa[j][i]=pa[pa[j][i-1]][i-1];
    cin>>q;
    while (q--)
    {
        cin>>p[0]>>p[1]>>p[2]>>p[3];
        if (p[0]>p[2]) cout<<"No\n";
        else if (p[1]>p[3]) cout<<"No\n";
        else if (p[0]==p[2]) cout<<"Yes\n";
        else if (mp.find(p[0])==mp.end()||mp[p[0]].lower_bound(make_pair(p[1], 0))==mp[p[0]].end()) cout<<"No\n";
        else
        {
            int st=mp[p[0]].lower_bound(make_pair(p[1], 0))->second;
            for (int i=kx-1; i>=0; i--) if (x[pa[st][i]]<p[2]) st=pa[st][i];
            if (x[st]!=p[2]-1) cout<<"No\n";
            else if (y[st]<=p[3]) cout<<"Yes\n";
            else cout<<"No\n";

        }
    }
}

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