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Submission #956421

# Submission time Handle Problem Language Result Execution time Memory
956421 2024-04-01T19:31:14 Z Desh03 Stations (IOI20_stations) C++17
100 / 100
 601 ms 1556 KB 
#include <bits/stdc++.h>

using namespace std;

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    vector<vector<int>> g(n);
    for (int i = 0; i < n - 1; i++) {
        g[u[i]].push_back(v[i]);
        g[v[i]].push_back(u[i]);
    }
    vector<int> in(n), en(n), d(n);
    int t = 0;
    auto dfs = [&](const auto &self, int u) -> void {
        in[u] = t++;
        for (int v : g[u]) {
            g[v].erase(find(g[v].begin(), g[v].end(), u));
            d[v] = d[u] + 1;
            self(self, v);
        }
        en[u] = t++;
    };
    dfs(dfs, 0);
    vector<int> id(n), ids;
    for (int i = 0; i < n; i++) {
        if (d[i] % 2 == 0) {
            id[i] = in[i];
        } else {
            id[i] = en[i];
        }
        ids.push_back(id[i]);
    }
    sort(ids.begin(), ids.end());
    for (int i = 0; i < n; i++) {
        id[i] = lower_bound(ids.begin(), ids.end(), id[i]) - ids.begin();
    }
    return id;
}

int find_next_station(int s, int t, vector<int> c) {
    if (c[0] > s) {
        int in = s + 1;
        for (int i = 0; i < c.size() - 1; i++) {
            if (in <= t && t <= c[i]) {
                return c[i];
            }
            in = c[i] + 1;
        }
        return c.back();
    } else {
        int en = s;
        for (int i = c.size() - 1; i > 0; i--) {
            if (c[i] <= t && t <= en) {
                return c[i];
            }
            en = c[i] - 1;
        }
        return c[0];
    }
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:42:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for (int i = 0; i < c.size() - 1; i++) {
      |                         ~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 346 ms 952 KB Output is correct
2 Correct 310 ms 956 KB Output is correct
3 Correct 601 ms 684 KB Output is correct
4 Correct 437 ms 684 KB Output is correct
5 Correct 389 ms 684 KB Output is correct
6 Correct 324 ms 936 KB Output is correct
7 Correct 291 ms 684 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 1 ms 1272 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 288 ms 1048 KB Output is correct
2 Correct 359 ms 804 KB Output is correct
3 Correct 579 ms 684 KB Output is correct
4 Correct 451 ms 684 KB Output is correct
5 Correct 383 ms 684 KB Output is correct
6 Correct 276 ms 684 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 332 ms 964 KB Output is correct
2 Correct 290 ms 1144 KB Output is correct
3 Correct 539 ms 684 KB Output is correct
4 Correct 444 ms 684 KB Output is correct
5 Correct 373 ms 684 KB Output is correct
6 Correct 311 ms 960 KB Output is correct
7 Correct 316 ms 864 KB Output is correct
8 Correct 1 ms 764 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 0 ms 768 KB Output is correct
11 Correct 410 ms 772 KB Output is correct
12 Correct 321 ms 1056 KB Output is correct
13 Correct 262 ms 1336 KB Output is correct
14 Correct 300 ms 684 KB Output is correct
15 Correct 32 ms 768 KB Output is correct
16 Correct 40 ms 868 KB Output is correct
17 Correct 63 ms 940 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 601 ms 684 KB Output is correct
2 Correct 412 ms 684 KB Output is correct
3 Correct 388 ms 684 KB Output is correct
4 Correct 2 ms 764 KB Output is correct
5 Correct 2 ms 764 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 391 ms 684 KB Output is correct
8 Correct 572 ms 852 KB Output is correct
9 Correct 391 ms 684 KB Output is correct
10 Correct 319 ms 684 KB Output is correct
11 Correct 3 ms 768 KB Output is correct
12 Correct 2 ms 768 KB Output is correct
13 Correct 3 ms 764 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 314 ms 684 KB Output is correct
17 Correct 333 ms 684 KB Output is correct
18 Correct 332 ms 684 KB Output is correct
19 Correct 321 ms 684 KB Output is correct
20 Correct 305 ms 684 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 375 ms 948 KB Output is correct
2 Correct 296 ms 944 KB Output is correct
3 Correct 549 ms 684 KB Output is correct
4 Correct 493 ms 684 KB Output is correct
5 Correct 390 ms 684 KB Output is correct
6 Correct 271 ms 964 KB Output is correct
7 Correct 284 ms 684 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 0 ms 768 KB Output is correct
11 Correct 288 ms 1036 KB Output is correct
12 Correct 341 ms 1088 KB Output is correct
13 Correct 593 ms 684 KB Output is correct
14 Correct 453 ms 684 KB Output is correct
15 Correct 396 ms 684 KB Output is correct
16 Correct 283 ms 684 KB Output is correct
17 Correct 369 ms 940 KB Output is correct
18 Correct 273 ms 1192 KB Output is correct
19 Correct 317 ms 1556 KB Output is correct
20 Correct 299 ms 880 KB Output is correct
21 Correct 33 ms 768 KB Output is correct
22 Correct 40 ms 932 KB Output is correct
23 Correct 62 ms 876 KB Output is correct
24 Correct 3 ms 768 KB Output is correct
25 Correct 4 ms 768 KB Output is correct
26 Correct 2 ms 768 KB Output is correct
27 Correct 3 ms 764 KB Output is correct
28 Correct 0 ms 768 KB Output is correct
29 Correct 315 ms 684 KB Output is correct
30 Correct 321 ms 684 KB Output is correct
31 Correct 349 ms 684 KB Output is correct
32 Correct 375 ms 684 KB Output is correct
33 Correct 307 ms 684 KB Output is correct
34 Correct 204 ms 944 KB Output is correct
35 Correct 268 ms 1484 KB Output is correct
36 Correct 298 ms 1196 KB Output is correct
37 Correct 306 ms 1136 KB Output is correct
38 Correct 266 ms 1144 KB Output is correct
39 Correct 279 ms 1000 KB Output is correct
40 Correct 292 ms 984 KB Output is correct
41 Correct 295 ms 984 KB Output is correct
42 Correct 42 ms 848 KB Output is correct
43 Correct 66 ms 876 KB Output is correct
44 Correct 85 ms 872 KB Output is correct
45 Correct 106 ms 880 KB Output is correct
46 Correct 195 ms 868 KB Output is correct
47 Correct 204 ms 920 KB Output is correct
48 Correct 35 ms 1220 KB Output is correct
49 Correct 35 ms 1316 KB Output is correct