Submission #493902

#	Time	Username	Problem	Language	Result	Execution time	Memory
493902		balbit	Trampoline (info1cup20_trampoline)	C++14	11 / 100	592 ms	30668 KiB

trampoline

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

#define ll long long
#define f first
#define s second
#define pii pair<ll, ll>

#define REP(i,n) for (int i = 0; i<n; ++i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)
#define MX(a,b) a = max(a,b)
#define MN(a,b) a = min(a,b)

#define ALL(x) (x).begin(), (x).end()
#define SZ(x) (int)((x).size())
#define pb push_back

#ifdef BALBIT
#define bug(...) cerr<<"#"<<__LINE__<<": "<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do( T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do( T && x, S && ...y) {cerr<<x<<", "; _do(y...);}
#else
#define bug(...)
#define endl '\n'
#endif // BALBIT


const int maxn = 2e5+5;
int row[maxn], col[maxn];
int nxt[20][maxn];
map<int, vector<pii> > mp; // the vectors store {col, index}

signed main(){
    ios::sync_with_stdio(0), cin.tie(0);

    bug(1,2);

    int R,C; cin>>R>>C;
    int n; cin>>n;
    REP(i,n) {
        int r, c; cin>>r>>c;
        mp[r].pb({c, i});
        row[i] = r; col[i] = c;
    }

    nxt[0][n] = n; row[n] = R+1; col[n] = C+1;

    for (auto &u : mp) {
        sort(ALL(u.s));
        for (pii p : u.s) {
            auto it = lower_bound(ALL(mp[u.f+1]), pii{p.f, -1});
            if (it == mp[u.f+1].end()) {
                nxt[0][p.s] = n;
            }else{
                nxt[0][p.s] = it->s;
            }
        }
    }

    for (int j = 1; j<20; ++j) {
        REP(i,n+1) {
            nxt[j][i] = nxt[j-1][nxt[j-1][i]];
        }
    }

    int q; cin>>q;
    while (q--) {
        ll Rs, Cs, Re, Ce;
        cin>>Rs>>Cs>>Re>>Ce;
        if (Re < Rs || Ce < Cs) {
            bug("bruh");
            cout<<"No"<<endl; continue;
        }
        if (Re == Rs) {
            bug("same row...");
            cout<<"Yes"<<endl; continue;
        }
        if (!mp.count(Rs)) {
            bug("no available down");
            cout<<"No"<<endl; continue;
        }
        auto it = lower_bound(ALL(mp[Rs]), make_pair(Cs, -1ll));
        int who = (it==mp[Rs].end())?(n) : it->s;
        if (it != mp[Rs].end())
            bug(it->f, it->s);
        for (int i = 19; i>=0; --i) {
            int ty = nxt[i][who];
            if (ty != n && row[ty] < Re) {
                who = nxt[i][who];
            }
        }
        if (who!=n && row[who] == Re-1 && col[who] <= Ce) {
            cout<<"Yes"<<endl;
        }else{
            bug("Sorry! Toof ar!");
            cout<<"No"<<endl;
        }

    }


}

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