oj.uz

Submission #521689

# Submission time Handle Problem Language Result Execution time Memory
521689 2022-02-02T18:17:51 Z ivan24 Furniture (JOI20_furniture) C++14
100 / 100
 1779 ms 20012 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long int;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef pair<ll,ll> ii;
typedef vector<ii> vii;
#define F first
#define S second

ll min(ll x, ll y){
    return ((x < y) ? x : y);
}

ll max(ll x, ll y){
    return ((x > y) ? x : y);
}

class Grid{
private:
    ll w,h;
    vvi c;
    vii upper_path; // minimize y value
    vii left_path; // minimize x value
    bool check (ll x, ll y){
        return (h > x && x >= 0 && w > y && y >= 0);
    }
    bool check (ii p){
        return (h > p.F && p.F >= 0 && w > p.S && p.S >= 0);
    }
    void modify_path(ll x, ll y, vii& path, ll dx, ll dy){
        while (c[path[x+y].F][path[x+y].S] == 1){
            path[x+y].F += dx;
            path[x+y].S += dy;
        }
        ll bdx = max(dx,0), sdx = min(dx,0);
        ll bdy = max(dy,0), sdy = min(dy,0);
        vii for_mod;
        for (ll i = x+y-1; i >= 0; i--){
            ll diff = abs(path[i+1].F-path[i].F) + abs(path[i+1].S-path[i].S);
            //cout << "diff: " << diff << endl;
            if (diff == 1) break;
            ii cd = path[i+1];
            cd.F -= bdx; cd.S -= bdy;
            //cout << cd.F << " " << cd.S << endl;
            if (c[cd.F][cd.S] == 1) for_mod.push_back(cd);
            path[i] = cd;
        }
        for (ll i = x+y+1; w+h-2 >= i; i++){
            ll diff = abs(path[i-1].F-path[i].F) + abs(path[i-1].S-path[i].S);
            //cout << "diff: " << diff << endl;
            if (diff == 1) break;
            ii cd = path[i-1];
            cd.F -= sdx; cd.S -= sdy;
            //cout << cd.F << " " << cd.S << endl;
            if (c[cd.F][cd.S] == 1) for_mod.push_back(cd);
            path[i] = cd;
        }
        //cout << "reached\n";
        for (auto i: for_mod){
            add(i.F,i.S);
        }
    }
public:
    Grid(ll _h, ll _w){
        w = _w; h = _h;
        c.assign(h,vi(w,0));
        upper_path.resize(w+h-1);
        left_path.resize(w+h-1);
        for (ll i = 0; w+h-1 > i; i++){
            upper_path[i] = ii(max(0,i-w+1),min(i,w-1));
            left_path[i] = ii(min(i,h-1),max(0,i-h+1));
        }
    }
    ll add (ll x, ll y){
        //cout << "called: " << x << " " << y << endl;
        if (left_path[x+y] == ii(x,y) && upper_path[x+y] == ii(x,y)) return 0;
        c[x][y] = 1;
        if (upper_path[x+y] == ii(x,y)) modify_path(x,y,upper_path, 1, -1);
        if (left_path[x+y] == ii(x,y)) modify_path(x,y,left_path, -1, 1);
        return 1;
    }
    void print(){
        cout << "upper_path: \n";
        for (auto i: upper_path){
            cout << "(" << i.F << " , " << i.S << ") -> ";
        }
        cout << endl;
        cout << "left_path:\n";
        for (auto i: left_path){
            cout << "(" << i.F << " , " << i.S << ") -> ";
        }
        cout << endl;
        cout << "c:\n";
        for (ll i = 0; h > i; i++){
            for (ll j = 0; w > j; j++){
                if (upper_path[i+j] == ii(i,j) || left_path[i+j] == ii(i,j)) cout << "* ";
                else cout << c[i][j] << " ";
            }
            cout << endl;
        }
        cout << endl;
    }
};

int main(){
    ll h,w;
    cin >> h >> w;
    Grid grid(h,w);
    //grid.print();
    for (ll i = 0; h > i; i++){
        for (ll j = 0; w > j; j++){
            ll x; cin >> x;
            //cout << "added: " << i << " " << j << endl;
            if (x) grid.add(i,j);
        }
    }
    ll q; cin >> q;
    //grid.print();
    while (q--){
        ll x, y; cin >> x >> y;
        x--; y--;
        cout << grid.add(x,y) << '\n';
        //grid.print();
    }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 6 ms 300 KB Output is correct
3 Correct 8 ms 304 KB Output is correct
4 Correct 15 ms 428 KB Output is correct
5 Correct 15 ms 432 KB Output is correct
6 Correct 17 ms 468 KB Output is correct
7 Correct 17 ms 484 KB Output is correct
8 Correct 17 ms 460 KB Output is correct
9 Correct 16 ms 460 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 6 ms 300 KB Output is correct
3 Correct 8 ms 304 KB Output is correct
4 Correct 15 ms 428 KB Output is correct
5 Correct 15 ms 432 KB Output is correct
6 Correct 17 ms 468 KB Output is correct
7 Correct 17 ms 484 KB Output is correct
8 Correct 17 ms 460 KB Output is correct
9 Correct 16 ms 460 KB Output is correct
10 Correct 45 ms 980 KB Output is correct
11 Correct 11 ms 332 KB Output is correct
12 Correct 589 ms 12752 KB Output is correct
13 Correct 146 ms 8992 KB Output is correct
14 Correct 1431 ms 17304 KB Output is correct
15 Correct 1501 ms 16964 KB Output is correct
16 Correct 1617 ms 18232 KB Output is correct
17 Correct 1696 ms 19136 KB Output is correct
18 Correct 1650 ms 19008 KB Output is correct
19 Correct 1758 ms 19752 KB Output is correct
20 Correct 1706 ms 20012 KB Output is correct
21 Correct 1779 ms 19900 KB Output is correct