Submission #867717

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
867717	2023-10-29 10:06:41	BoopyTheNoob	Tracks in the Snow (BOI13_tracks)	C++14	84.69 / 100	2087 ms	743992 KiB

tracks

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#include <iostream>
#include <vector>
#include <deque>
using namespace std;
int main (void) {
    iostream::sync_with_stdio(false);
  cin.tie(0);
    int dx[4] = {0, 0, 1, -1};
    int dy[4] = {1, -1, 0, 0};
    int N, M;
    cin >> N >> M;
    vector<string> grid(N);
    for (int i = 0; i < N; i++)
        cin >> grid[i];
    vector<vector<int>> dist(N, vector<int>(M, 1e9));
    deque<vector<int>> bfs;
    bfs.push_back({0, 0, 1});
    int ans = 0;
    while (!bfs.empty()) {
        int x = bfs.front()[0], y = bfs.front()[1], d = bfs.front()[2];
        bfs.pop_front();
        dist[x][y] = d;
        ans = max(ans, d);
        for (int i = 0; i < 4; i++) {
            int nx = x + dx[i], ny = y + dy[i];
            if (nx < 0 || nx >= N || ny < 0 || ny >= M)
                continue;
            if (dist[nx][ny] < 1e9 || grid[nx][ny] == '.')
                continue;
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 54.6875 / 70