oj.uz

Submission #757459

# Submission time Handle Problem Language Result Execution time Memory
757459 2023-06-13T08:13:42 Z The_Samurai Tracks in the Snow (BOI13_tracks) C++17
0 / 100
 2000 ms 165584 KB 
#include "bits/stdc++.h"

using namespace std;

int INF = 1e9;
vector<int> dx = {1, -1, 0, 0};
vector<int> dy = {0, 0, 1, -1};

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
    clock_t startTime = clock();

    int n, m;
    cin >> n >> m;
    vector<vector<char>> a(n, vector<char>(m, '.'));
    auto nw = a;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> a[i][j];
        }
    }
    if (max(n, m) == 1) {
        cout << 1;
        return 0;
    }
    vector<pair<int, int>> can = {{0, 0}};
    vector<vector<bool>> vis(n, vector<bool>(m));
    char x = a[0][0];
    nw[0][0] = x;
    vis[0][0] = true;
    int ans = 0;
    cout << 1 << endl;
    while (nw != a) {
        ans++;
        for (int p = 0; p < can.size(); p++) {
            auto [i, j] = can[p];
            for (int k = 0; k < 4; k++) {
                int ii = i + dx[k];
                int jj = j + dy[k];
                if (min(ii, jj) < 0 or ii == n or jj == m) continue;
                if (vis[ii][jj]) continue;
                if (a[ii][jj] == x) {
                    can.emplace_back(ii, jj);
                    vis[ii][jj] = true;
                    nw[ii][jj] = x;
                }
            }
        }
//        for (int i = 0; i < n; i++) {
//            for (int j = 0; j < m; j++) {
//                cout << nw[i][j];
//            }
//            cout << endl;
//        }
//        cout << endl;
        x = (x == 'R' ? 'L' : 'R');
    }
    cout << ans;



#ifdef sunnitov
    cerr << "\nTime: " << (int)((double)(clock() - startTime) / CLOCKS_PER_SEC * 1000);
#endif
}

/*
 FFR.....
 .FRRR...
 .FFFFF..
 ..RRRFFR
 .....FFF
*/

Compilation message

tracks.cpp: In function 'int main()':
tracks.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for (int p = 0; p < can.size(); p++) {
      |                         ~~^~~~~~~~~~~~
tracks.cpp:11:13: warning: unused variable 'startTime' [-Wunused-variable]
   11 |     clock_t startTime = clock();
      |             ^~~~~~~~~

Subtask #1
0 / 30.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2070 ms 1108 KB Time limit exceeded
2 Execution timed out 2040 ms 212 KB Time limit exceeded
3 Execution timed out 2069 ms 212 KB Time limit exceeded
4 Execution timed out 2064 ms 1748 KB Time limit exceeded
5 Execution timed out 2068 ms 468 KB Time limit exceeded
6 Execution timed out 2074 ms 212 KB Time limit exceeded
7 Execution timed out 2058 ms 340 KB Time limit exceeded
8 Execution timed out 2068 ms 340 KB Time limit exceeded
9 Execution timed out 2070 ms 340 KB Time limit exceeded
10 Execution timed out 2059 ms 468 KB Time limit exceeded
11 Execution timed out 2074 ms 984 KB Time limit exceeded
12 Execution timed out 2068 ms 468 KB Time limit exceeded
13 Execution timed out 2068 ms 468 KB Time limit exceeded
14 Execution timed out 2070 ms 468 KB Time limit exceeded
15 Execution timed out 2069 ms 980 KB Time limit exceeded
16 Execution timed out 2069 ms 1108 KB Time limit exceeded
17 Execution timed out 2064 ms 852 KB Time limit exceeded
18 Execution timed out 2061 ms 1876 KB Time limit exceeded

Subtask #2
0 / 70.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2058 ms 980 KB Time limit exceeded
2 Execution timed out 2077 ms 3788 KB Time limit exceeded
3 Execution timed out 2096 ms 34228 KB Time limit exceeded
4 Execution timed out 2074 ms 8396 KB Time limit exceeded
5 Execution timed out 2079 ms 19384 KB Time limit exceeded
6 Execution timed out 2084 ms 67020 KB Time limit exceeded
7 Execution timed out 2084 ms 1108 KB Time limit exceeded
8 Execution timed out 2086 ms 980 KB Time limit exceeded
9 Execution timed out 2086 ms 596 KB Time limit exceeded
10 Execution timed out 2080 ms 340 KB Time limit exceeded
11 Execution timed out 2084 ms 980 KB Time limit exceeded
12 Execution timed out 2082 ms 340 KB Time limit exceeded
13 Execution timed out 2082 ms 3788 KB Time limit exceeded
14 Execution timed out 2064 ms 2388 KB Time limit exceeded
15 Execution timed out 2071 ms 2460 KB Time limit exceeded
16 Execution timed out 2059 ms 1748 KB Time limit exceeded
17 Execution timed out 2062 ms 9044 KB Time limit exceeded
18 Execution timed out 2071 ms 8924 KB Time limit exceeded
19 Execution timed out 2074 ms 8408 KB Time limit exceeded
20 Execution timed out 2081 ms 7648 KB Time limit exceeded
21 Execution timed out 2067 ms 20080 KB Time limit exceeded
22 Execution timed out 2056 ms 19376 KB Time limit exceeded
23 Execution timed out 2080 ms 17088 KB Time limit exceeded
24 Execution timed out 2037 ms 19704 KB Time limit exceeded
25 Execution timed out 2066 ms 34124 KB Time limit exceeded
26 Incorrect 626 ms 157656 KB Output isn't correct
27 Execution timed out 2068 ms 165584 KB Time limit exceeded
28 Execution timed out 2083 ms 67072 KB Time limit exceeded
29 Execution timed out 2069 ms 67056 KB Time limit exceeded
30 Execution timed out 2086 ms 165000 KB Time limit exceeded
31 Execution timed out 2057 ms 22656 KB Time limit exceeded
32 Execution timed out 2067 ms 34232 KB Time limit exceeded