Submission #842269

#	Time	Username	Problem	Language	Result	Execution time	Memory
842269		7mody	축구 경기장 (IOI23_soccer)	C++17	Compilation error	0 ms	0 KiB

soccer

#include "soccer.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

vector<vector<int>> row;
vector<vector<int>> col;
vector<vector<int>> arr;
int n;

bool check(int x1, int y1, int x2, int y2)
{
    if (x1 == x2)
        return (row[x1][y1] - row[x1][y2] == 0);
    if (y1 == y2)
        return (col[x1][y1] - col[x2][y2] == 0);
    return ((row[x1][y1] - row[x1][y2] == 0 && col[x1][y2] - col[x2][y2] == 0) || (col[x1][y1] - col[x2][y1] == 0 && row[x2][y1] - row[x2][y2] == 0));
}

int biggest_stadium(int N, vector<vector<int>> F)
{
    arr = F;
    n = N;
    int ans = 0;
    row = F;
    col = F;
    for (int i = 0; i < n; i++)
    {
        for (int j = 1; j < n; j++)
        {
            row[i][j] += row[i][j - 1];
            col[j][i] += col[j - 1][i];
        }
    }

    // for (auto c : row)
    // {
    //     for (auto g : c)
    //         cout << g << ' ';
    //     cout << endl;
    // }
    // cout << endl;
    // for (auto c : col)
    // {
    //     for (auto g : c)
    //         cout << g << ' ';
    //     cout << endl;
    // }
    // cout << endl;

    queue<pair<int, int>> q;

    for (int i = 0; i < n; i++)
    {
        for (int  j = 0; j < n; j++)
        {
            if (arr[i][j])
                continue;
            q.push({i - 1, j});
            q.push({i, j - 1});
            q.push({i + 1, j});
            q.push({i, j + 1});
            int curr = 1;
            vector<pair<int, int>> found;
            vector<vector<bool>> vis(n, vector<bool>(n));
            vis[i][j] = true;
            found.push_back({i, j});
            while (!q.empty())
            {
                int x = q.front().first, y = q.front().second;
                q.pop();
                bool ok = true;
                if (x == -1 || x == n || y == -1 || y == n )
                    continue;
                if(arr[x][y] || vis[x][y]) continue;
                vis[x][y] = true;
                for (pair<int, int> c : found)
                {
                    if (!check(c.first, c.second, x, y))
                    {
                        ok = false;
                        break;
                    }
                }
                if (!ok)
                    continue;
                found.push_back({x, y});
                curr++;
                // cout << curr << ' ' << x << ' ' << y << endl;
                q.push({x - 1, y});
                q.push({x, y - 1});
                q.push({x + 1, y});
                q.push({x, y - 1});
            }
            ans = max(ans, curr);
        }
    }
    return ans;
}

void solve()
{
    int n;
    cin >> n;
    vector<vector<int>> arr(n, vector<int>(n));
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cin >> arr[i][j];
        }
    }
    cout << biggest_stadium(n, arr) << endl;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie();
    cout.tie();
    int t = 1;
    cin >> t;
    while (t--)
    {
        solve();
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccj9blId.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccwMbuMb.o:soccer.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status