Submission #920990

#	Time	Username	Problem	Language	Result	Execution time	Memory
920990		thelegendary08	Trampoline (info1cup20_trampoline)	C++14	23 / 100	2033 ms	36000 KiB

trampoline

#include<bits/stdc++.h>
#define f0r(i,n) for(int i = 0;i<n;i++)
#define pb push_back
#define ll long long int
using namespace std;
const int mxn = 500005;
int main(){
    ll r,c,n;
    cin>>r>>c>>n;
    vector<pair<ll,ll>>green;
    map<ll, set<ll>>m;
    f0r(i,n){
        ll x,y;
        cin>>x>>y;
        m[x].insert(y);
        green.pb({x,y});
    }
    map<pair<ll,ll>, pair<ll,ll>>nxt;
    for(pair<ll,ll> p : green){
        auto ptr = lower_bound(m[p.first + 1].begin(), m[p.first + 1].end(), p.second);
        if(ptr != m[p.first + 1].end())nxt[p] = {p.first + 1, *ptr};
        else nxt[p] = {p.first + 1, p.second};
    }
    int t;
    cin>>t;
    while(t--){
        bool ans = 1;
        ll sx, sy, ex, ey;
        cin>>sx>>sy>>ex>>ey;
        if(sx == ex)cout<<"Yes"<<'\n';
        else if(sx > ex || sy > ey)cout<<"No"<<'\n';
        else if(m.count(sx) == 0 || m.count(ex) == 0)cout<<"No"<<'\n';
        else{
            auto ptr1 = lower_bound(m[sx].begin(), m[sx].end(), sy);
            //auto ptr2 = upper_bound(m[ex].begin(), m[ex].end(), ey);
            if(ptr1 == m[sx].end()){

                ans = 0;
            }
            /*
            if(ptr2 == m[sy].begin()){
                cout<<"No"<<'\n';
                break;
            }
            ptr2--;
            */
            if(ans){
                sy = *ptr1;
                //ey = *ptr2;

                pair<ll,ll> loc = {sx, sy};

                while(loc.first <ex){
                    //cout<<loc.first<<' '<<loc.second<<'\n';
                    if(nxt.count(loc) == 0){
                        ans = 0;
                        break;
                    }

                    else{
                        if(loc.first == ex - 1)loc = {loc.first + 1, loc.second};
                        else loc = nxt[loc];
                    }

                }
                if(!ans)cout<<"No"<<'\n';
                else if(loc.second <= ey)cout<<"Yes"<<'\n';
                else cout<<"No"<<'\n';
            }
            else{
                cout<<"No"<<'\n';
            }


        }

    }
}

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