oj.uz

Submission #598681

# Submission time Handle Problem Language Result Execution time Memory
598681 2022-07-18T17:30:32 Z stevancv Tracks in the Snow (BOI13_tracks) C++14
5.52083 / 100
 1192 ms 1048576 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 4e3 + 2;
int a[N][N], c[N][N], n, m, iden;
bool Can(int x, int y) {return 0 <= x && x < n && 0 <= y && y < m && c[x][y] == -1;}
void Dfs(int i, int j) {
    c[i][j] = iden;
    if (Can(i - 1, j) && a[i - 1][j] == a[i][j]) Dfs(i - 1, j);
    if (Can(i, j - 1) && a[i][j - 1] == a[i][j]) Dfs(i, j - 1);
    if (Can(i + 1, j) && a[i + 1][j] == a[i][j]) Dfs(i + 1, j);
    if (Can(i, j + 1) && a[i][j + 1] == a[i][j]) Dfs(i, j + 1);
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    for (int i = 0; i < n; i++) {
        string s; cin >> s;
        for (int j = 0; j < m; j++) {
            c[i][j] = -1;
            if (s[j] == 'F') a[i][j] = 1;
            if (s[j] == 'R') a[i][j] = 2;
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (c[i][j] == -1 && a[i][j] > 0) {
                Dfs(i, j);
                iden += 1;
            }
        }
    }
    vector<set<int>> g(iden);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (c[i][j] == -1) continue;
            if (i < n - 1 && c[i + 1][j] != c[i][j] && c[i + 1][j] != -1) g[c[i][j]].insert(c[i + 1][j]);
            if (j < m - 1 && c[i][j + 1] != c[i][j] && c[i][j + 1] != -1) g[c[i][j]].insert(c[i][j + 1]);
        }
    }
    vector<int> dist(iden, 1e9);
    queue<int> q;
    dist[0] = 0;
    q.push(0);
    while (!q.empty()) {
        int s = q.front(); q.pop();
        for (int u : g[s]) {
            if (dist[u] > dist[s] + 1) {
                dist[u] = dist[s] + 1;
                q.push(u);
            }
        }
    }
    int ans = 0;
    for (int i = 0; i < iden; i++) {
        smax(ans, dist[i] + 1);
    }
    cout << ans << en;
    return 0;
}

Subtask #1
3.33333333333 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 27 ms 12164 KB Output isn't correct
2 Incorrect 1 ms 468 KB Output isn't correct
3 Incorrect 1 ms 716 KB Output isn't correct
4 Incorrect 10 ms 7892 KB Output isn't correct
5 Incorrect 4 ms 4184 KB Output isn't correct
6 Incorrect 1 ms 452 KB Output isn't correct
7 Incorrect 1 ms 724 KB Output isn't correct
8 Correct 1 ms 852 KB Output is correct
9 Incorrect 1 ms 1236 KB Output isn't correct
10 Incorrect 5 ms 3664 KB Output isn't correct
11 Correct 3 ms 3028 KB Output is correct
12 Incorrect 10 ms 5460 KB Output isn't correct
13 Incorrect 4 ms 4280 KB Output isn't correct
14 Incorrect 4 ms 4148 KB Output isn't correct
15 Incorrect 22 ms 11536 KB Output isn't correct
16 Incorrect 27 ms 12092 KB Output isn't correct
17 Incorrect 16 ms 10524 KB Output isn't correct
18 Incorrect 9 ms 8020 KB Output isn't correct

Subtask #2
2.1875 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 32276 KB Output isn't correct
2 Incorrect 73 ms 45244 KB Output isn't correct
3 Incorrect 397 ms 279988 KB Output isn't correct
4 Incorrect 107 ms 74300 KB Output isn't correct
5 Incorrect 477 ms 528472 KB Output isn't correct
6 Incorrect 972 ms 318636 KB Output isn't correct
7 Incorrect 16 ms 33576 KB Output isn't correct
8 Incorrect 14 ms 32204 KB Output isn't correct
9 Incorrect 3 ms 1748 KB Output isn't correct
10 Incorrect 1 ms 724 KB Output isn't correct
11 Incorrect 19 ms 32724 KB Output isn't correct
12 Incorrect 2 ms 2772 KB Output isn't correct
13 Incorrect 74 ms 45136 KB Output isn't correct
14 Incorrect 42 ms 28108 KB Output isn't correct
15 Incorrect 37 ms 31080 KB Output isn't correct
16 Incorrect 37 ms 19908 KB Output isn't correct
17 Incorrect 184 ms 106444 KB Output isn't correct
18 Incorrect 131 ms 105604 KB Output isn't correct
19 Incorrect 112 ms 74572 KB Output isn't correct
20 Incorrect 93 ms 75756 KB Output isn't correct
21 Incorrect 235 ms 184288 KB Output isn't correct
22 Incorrect 496 ms 528516 KB Output isn't correct
23 Incorrect 335 ms 192464 KB Output isn't correct
24 Incorrect 258 ms 232360 KB Output isn't correct
25 Incorrect 498 ms 364580 KB Output isn't correct
26 Runtime error 559 ms 1048576 KB Execution killed with signal 9
27 Correct 791 ms 684116 KB Output is correct
28 Incorrect 965 ms 318528 KB Output isn't correct
29 Incorrect 868 ms 295680 KB Output isn't correct
30 Incorrect 836 ms 409528 KB Output isn't correct
31 Incorrect 1192 ms 349128 KB Output isn't correct
32 Incorrect 807 ms 683204 KB Output isn't correct