Submission #1238157

#	Time	Username	Problem	Language	Result	Execution time	Memory
1238157		matsakyannn	Soccer Stadium (IOI23_soccer)	C++20	1.50 / 100	205 ms	35808 KiB

soccer

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

#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x << ' '; print(x); cerr << endl;
#else
#define dbg(x)
#endif 

void print(int x) {cerr << x;}
void print(long long x) {cerr << x;}
void print(char x) {cerr << x;}
void print(string x) {cerr << x;}
void print(double x) {cerr << x;}
template <class T> void print(vector <T> x);
template <class T> void print(set <T> x);
template <class T> void print(multiset <T> x);
template <class T, class V> void print(pair <T, V> x);
template <class T, class V> void print(map <T, V> x);
template <class T> void print(vector <T> x) {cerr << "[ "; for(auto i : x) {print(i); cerr << ' ';} cerr << "]";}
template <class T> void print(set <T> x) {cerr << "[ "; for(auto i : x) {print(i); cerr << ' ';} cerr << "]";}
template <class T> void print(multiset <T> x) {cerr << "[ "; for(auto i : x) {print(i); cerr << ' ';} cerr << "]";}
template <class T, class V> void print(pair <T, V> x) {cerr << "{"; print(x.first); cerr << ' '; print(x.second); cerr << "}";}
template <class T, class V> void print(map <T, V> x) {cerr << "[ "; for(auto i : x) {print(i); cerr << ' ';} cerr << "]";}

#define ll long long
#define pb push_back
#define ppb pop_back
#define PII pair <int, int>
#define PLL pair <ll, ll>
#define all(v) (v).begin(), (v).end()
#define OK cerr << "OK\n";
#define MP make_pair

int dx[4] = {1, -1, 0, 0};
int dy[4] = {0, 0, 1, -1};
const int inf = 1e9;

int biggest_stadium(int N, vector <vector <int>> F){
    bool okay = 1;
    for(int i = 0; i < N; i++){
        int st = -1;
        for(int j = 0; j < N; j++){
            if(!F[i][j]){
                st = j; break;
            }
        }
        if(st == -1) continue;
        bool tree_on_road = 0;
        for(int j = st; j < N; j++){
            if(F[i][j]){
                tree_on_road = 1;
                continue;
            }
            if(tree_on_road) okay = 0;
        }
    }
    for(int j = 0; j < N; j++){
        int st = -1;
        for(int i = 0; i < N; i++){
            if(!F[i][j]){
                st = i;
                break;
            }
        }
        if(st == -1) continue;
        bool tree_on_road = 0;
        for(int i = st; i < N; i++){
            if(F[i][j]){
                tree_on_road = 1;
                continue;
            }
            if(tree_on_road) okay = 0;
        }
    }

    if(okay){
        int count = 0;
        for(int i = 0; i < N; i++){
            for(int j = 0; j < N; j++){
                count += F[i][j];
            }
        }

        int vis_count = 0;
        for(int i = 0; i < N; i++){
            bool flag = 0;
            for(int j = 0; j < N; j++){
                if(!F[i][j]){
                    flag = 1;
                    bool visited[2005][2005] = {0};
                    queue <PII> q;
                    q.push({i, j});
                    while(!q.empty()){
                        int x = q.front().first, y = q.front().second;
                        //dbg(MP(x, y));
                        q.pop();
                        if(visited[x][y]) continue;
                        vis_count++;
                        visited[x][y] = 1;
                        for(int t = 0; t < 4; t++){
                            int nx = x + dx[t], ny = y + dy[t];
                            if(nx < 0 || ny < 0 || nx >= N || ny >= N) continue;
                            if(F[nx][ny]) continue;
                            q.push({nx, ny});
                        }
                    }
                    break;
                }
            }
            if(flag) break;
        }
        if(vis_count == N * N - count) return N * N - count;
    }
    return inf;
}

• Subtask 0: 0 / 0
• Subtask 1: 1.5 / 6
• Subtask 2: 0 / 8
• Subtask 3: 0 / 22
• Subtask 4: 0 / 18
• Subtask 5: 0 / 16
• Subtask 6: 0 / 30