oj.uz

Submission #484940

# Submission time Handle Problem Language Result Execution time Memory
484940 2021-11-05T18:44:34 Z Olympia Tracks in the Snow (BOI13_tracks) C++17
82.5 / 100
 2000 ms 45412 KB 
#include <vector>
#include <iostream>
#include <cassert>
#include <cmath>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <set>
#include <algorithm>
#include <iomanip>

using namespace std;
vector<vector<bool>> hasVisited;
vector<string> grid;
vector<pair<int, int>> pos = {{0,  1},
                              {-1, 0},
                              {0,  -1},
                              {1,  0}};

int main() {
    //freopen("milkorder.in", "r", stdin);
    //freopen("milkorder.out", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, m;
    cin >> n >> m;
    priority_queue<pair<int, pair<int, int>>> q;
    grid.resize(n), hasVisited.resize(n);
    for (int i = 0; i < n; i++) {
        cin >> grid[i];
        hasVisited[i].assign(m, false);
    }
    q.push({0, {0, 0}});
    int myMax = 0;
    while (!q.empty()) {
        pair<int, int> loc = q.top().second;
        int dist = -q.top().first;
        q.pop();
        if (hasVisited[loc.first][loc.second]) {
            continue;
        }
        myMax = max(myMax, dist);
        hasVisited[loc.first][loc.second] = true;
        for (auto p: pos) {
            int nx = loc.first + p.first;
            int ny = loc.second + p.second;
            if (nx >= 0 && ny >= 0 && nx < n && ny < m && grid[nx][ny] != '.') {
                if (hasVisited[nx][ny]) {
                    myMax = max(myMax, dist + (grid[nx][ny] != grid[loc.first][loc.second]));
                    continue;
                }
                q.push(make_pair(-dist - (grid[nx][ny] != grid[loc.first][loc.second]),
                                 make_pair(nx, ny)));
            }
        }
    }
    cout << myMax;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 912 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 49 ms 1308 KB Output is correct
5 Correct 4 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 6 ms 332 KB Output is correct
11 Correct 12 ms 528 KB Output is correct
12 Correct 27 ms 608 KB Output is correct
13 Correct 4 ms 332 KB Output is correct
14 Correct 4 ms 332 KB Output is correct
15 Correct 56 ms 808 KB Output is correct
16 Correct 85 ms 916 KB Output is correct
17 Correct 27 ms 588 KB Output is correct
18 Correct 50 ms 1416 KB Output is correct

Subtask #2
52.5 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 588 KB Output is correct
2 Correct 159 ms 2252 KB Output is correct
3 Correct 439 ms 20460 KB Output is correct
4 Correct 103 ms 4940 KB Output is correct
5 Correct 132 ms 11432 KB Output is correct
6 Execution timed out 2075 ms 45412 KB Time limit exceeded
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 7 ms 548 KB Output is correct
10 Correct 1 ms 280 KB Output is correct
11 Correct 1 ms 716 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 160 ms 2252 KB Output is correct
14 Correct 90 ms 1484 KB Output is correct
15 Correct 11 ms 1484 KB Output is correct
16 Correct 92 ms 1196 KB Output is correct
17 Correct 428 ms 5444 KB Output is correct
18 Correct 45 ms 5196 KB Output is correct
19 Correct 103 ms 4940 KB Output is correct
20 Correct 113 ms 4428 KB Output is correct
21 Correct 263 ms 11724 KB Output is correct
22 Correct 133 ms 11340 KB Output is correct
23 Correct 828 ms 10100 KB Output is correct
24 Correct 93 ms 11468 KB Output is correct
25 Correct 250 ms 20444 KB Output is correct
26 Execution timed out 2094 ms 15692 KB Time limit exceeded
27 Execution timed out 2084 ms 23660 KB Time limit exceeded
28 Execution timed out 2090 ms 45176 KB Time limit exceeded
29 Execution timed out 2087 ms 45276 KB Time limit exceeded
30 Execution timed out 2074 ms 44712 KB Time limit exceeded
31 Execution timed out 2081 ms 14596 KB Time limit exceeded
32 Execution timed out 2081 ms 22140 KB Time limit exceeded