Submission #987044

#	Time	Username	Problem	Language	Result	Execution time	Memory
987044		Zbyszek99	Trampoline (info1cup20_trampoline)	C++17	100 / 100	1991 ms	206872 KiB

trampoline

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ff first
#define ss second
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define size(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace std;
//mt19937 mt;void random(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll rand(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

ll pair_to_int(pair<int,int> a)
{
    ll p = a.ff;
    ll p2 = a.ss;
    return p + p2*1000000005LL;
}

pair<int,int> int_to_pair(ll x)
{
    ll p2 = x / 1000000005LL;
    ll p = x - p2*1000000005LL;
    swap(p2,p);
    return {p2,p};
}

unordered_map<int, int> mapa;
vector<int> pon[200001];
unordered_map<ll,ll> next_[19];

int find_next(int y, int x)
{
  //  cout << "finding " << y << " " << x << " \n";
    int pocz = 0;
    int kon = size(pon[y])-1;
    int wyn = -1;
    while(pocz <= kon)
    {
        int srod = (pocz+kon)/2;
        if(pon[y][srod] >= x)
        {
            kon = srod-1;
            wyn = pon[y][srod];
        }
        else
        {
            pocz = srod+1;
        }
    }
    return wyn;
}

void solve()
{
    int R,C,n;
    cin >> R >> C >> n;
    vector<int> byly;
    vector<pair<int,int>> points;
  // cout << pair_to_int({2137,56}) << " " << int_to_pair(pair_to_int({2137,56})).ff << " " << int_to_pair(pair_to_int({2137,56})).ss << " xd\n";
    rep(i,n)
    {
        int x,y;
        cin >>y >> x;
        if(mapa[y] == 0) mapa[y] = i+1;
        pon[mapa[y]].pb(x);
        points.pb({y,x});
    }
    forall(it, mapa) sort(all(pon[it.ss]));
    int pop = -1;
    forall(it, mapa)
    {
        //cout << it.ff << " " << it.ss << " b\n"; 
        if(it.ff != pop) byly.pb(it.ff);
        pop = it.ff;
    }
    sort(all(byly));
    rep(i,size(byly))
    {
        //cout << byly[i] << i << " " <<size(byly)-1  << " byly\n";
        if(i == size(byly)-1 || byly[i] != byly[i+1]-1)
        {
            forall(it2,pon[mapa[byly[i]]])
            {
                next_[0][pair_to_int({byly[i],it2})] = pair_to_int({byly[i],it2});
            }
        }
        else
        {
            forall(it2,pon[mapa[byly[i]]])
            {
                int iter = find_next(mapa[byly[i+1]],it2);
                if(iter != -1)
                {
                    next_[0][pair_to_int({byly[i],it2})] = pair_to_int({byly[i+1],iter});
                }
                else
                {
                    next_[0][pair_to_int({byly[i],it2})] = pair_to_int({byly[i],it2});
                }
            }
        }
    }
    rep2(k,1,18)
    {
        forall(it,points)
        {
            next_[k][pair_to_int(it)] = next_[k-1][next_[k-1][pair_to_int(it)]];
        }
    }
    int q;
    cin >> q;
    rep(i,q)
    {
        int y1,x1,y2,x2;
        cin >> y1 >> x1 >> y2 >> x2;
        int odl = y2-y1-1;
        if(y2 < y1 || x2 < x1)
        {
            cout << "No\n"; continue;
        }
        if(y1 == y2)
        {
            cout << "Yes\n"; continue;
        }
        int aktpoint_iter = find_next(mapa[y1],x1);
        if(aktpoint_iter  == -1)
        {
            cout << "No\n"; continue;
        } 
        pair<int,int> aktpoint = {y1,aktpoint_iter};
        rep(k,18)
        {
           // cout << aktpoint.ff << " " << aktpoint.ss << " " << next_[k][pair_to_int(aktpoint)] << " aktpoint\n";
            if(odl & (1 << k))
            {
                aktpoint = int_to_pair(next_[k][pair_to_int(aktpoint)]);
            }
        }
        if(aktpoint.ff == y2-1 && aktpoint.ss <= x2)
        {
            cout << "Yes\n";
        }
        else
        {
            cout << "No\n";
        }
    }
}

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
   // random();
    int t = 1;
    //cin >> t;
    while(t--) solve();
}

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