Submission #1078289

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078289		PanosPask	Soccer Stadium (IOI23_soccer)	C++17	0 / 100	1 ms	348 KiB

soccer

#include "soccer.h"

using namespace std;

vector<vector<int>> grid;
vector<bool> empty_row;

vector<vector<int>> rotated;
vector<bool> empty_column;

bool check_row(vector<int>& r, vector<bool>& place, int pos)
{
    bool started = false;
    bool ended = false;

    for (int i = 0; i < r.size(); i++) {
        if (r[i] == 0) {
            if (ended) {
                return false;
            }
            if (!started) {
                started = true;
            }
        }
        else {
            if (started) {
                ended = true;
            }
        }
    }

    place[pos] = started;

    return true;
}

int biggest_stadium(int N, std::vector<std::vector<int>> F)
{
    grid.resize(N, vector<int>(N));
    rotated.resize(N, vector<int>(N));
    empty_column.resize(N);
    empty_row.resize(N);

    int tot = 0;
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            grid[i][j] = F[i][j];
            rotated[j][i] = F[i][j];
            tot += !F[i][j];
        }
    }

    bool good = true;
    for (int i = 0; i < N; i++) {
        good = good && check_row(grid[i], empty_row, i) && check_row(rotated[i], empty_column, i);
    }

    if (!good) {
        return 0;
    }

    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            if (empty_row[i] && empty_column[j]) {
                if (F[i][j] && F[j][i]) {
                    return 0;
                }
            }
        }
    }

    return tot;
}

Compilation message (stderr)

soccer.cpp: In function 'bool check_row(std::vector<int>&, std::vector<bool>&, int)':
soccer.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int i = 0; i < r.size(); i++) {
      |                     ~~^~~~~~~~~~

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