oj.uz

Submission #682021

# Submission time Handle Problem Language Result Execution time Memory
682021 2023-01-15T09:14:37 Z junkbot Stations (IOI20_stations) C++14
100 / 100
 884 ms 1356 KB 
#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

#define D(x...) fprintf(stderr, x)
#define D(x...)

const int MAX_N = 1005;
const int UNLABELLED = -1;
const int PENDING = -2;

struct Solve {
    int upto;
    vector<vector<int>> adjlist;
    vector<int> labels;

    Solve(int n, vector<int> u, vector<int> v) : upto(0), adjlist(n), labels(n) {
        for (auto i=0;i<u.size();i++) {
            adjlist[u[i]].push_back(v[i]);
            adjlist[v[i]].push_back(u[i]);
        }
        fill(labels.begin(), labels.end(), UNLABELLED);
    }

    // label everything in u's subtree.
    void go(int u, bool isPre) {
        if (labels[u] != UNLABELLED) return;
        labels[u] = PENDING;

        if (isPre) labels[u] = getNext();
        for (auto v: adjlist[u]) go(v, !isPre);
        if (!isPre) labels[u] = getNext();
    }

    int getNext() {
        int ret = upto;
        upto++;
        return ret;
    }
};

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    auto solver = new Solve(n, u, v);
    solver->go(0, true);

    vector<int> ret;
    for (auto l: solver->labels) {
        ret.push_back(l);
    }
    D("labels:");
    for (auto l: solver->labels) {
        D(" %d", l);
    }
    D("\n");

	return ret;
}

int find_next_station(int s, int t, std::vector<int> c) {
    if (s < c.front()) {
        // preorder
        int left_exclusive = s;
        for (auto i=0;i<c.size()-1;i++) {
            auto l = c[i];
            if (left_exclusive < t && t <= l) return l;
            left_exclusive = l;
        }
        return c.back();
    } else {
        // postorder
        int right_exclusive = s;
        for (auto i=c.size()-1;i>0;i--) {
            auto l = c[i];
            if (l <= t && t < right_exclusive) return l;
            right_exclusive = l;
        }
        return c.front();
    }
}

Compilation message

stations.cpp:7: warning: "D" redefined
    7 | #define D(x...)
      | 
stations.cpp:6: note: this is the location of the previous definition
    6 | #define D(x...) fprintf(stderr, x)
      | 
stations.cpp: In constructor 'Solve::Solve(int, std::vector<int>, std::vector<int>)':
stations.cpp:19:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (auto i=0;i<u.size();i++) {
      |                       ~^~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:52:15: warning: unused variable 'l' [-Wunused-variable]
   52 |     for (auto l: solver->labels) {
      |               ^
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:64:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for (auto i=0;i<c.size()-1;i++) {
      |                       ~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 559 ms 840 KB Output is correct
2 Correct 476 ms 1008 KB Output is correct
3 Correct 884 ms 420 KB Output is correct
4 Correct 639 ms 508 KB Output is correct
5 Correct 577 ms 420 KB Output is correct
6 Correct 344 ms 1140 KB Output is correct
7 Correct 389 ms 540 KB Output is correct
8 Correct 1 ms 504 KB Output is correct
9 Correct 4 ms 496 KB Output is correct
10 Correct 1 ms 492 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 441 ms 1016 KB Output is correct
2 Correct 489 ms 612 KB Output is correct
3 Correct 787 ms 420 KB Output is correct
4 Correct 554 ms 416 KB Output is correct
5 Correct 531 ms 420 KB Output is correct
6 Correct 400 ms 548 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 471 ms 804 KB Output is correct
2 Correct 461 ms 1072 KB Output is correct
3 Correct 866 ms 416 KB Output is correct
4 Correct 679 ms 416 KB Output is correct
5 Correct 506 ms 500 KB Output is correct
6 Correct 418 ms 1060 KB Output is correct
7 Correct 403 ms 504 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 3 ms 496 KB Output is correct
10 Correct 0 ms 500 KB Output is correct
11 Correct 548 ms 416 KB Output is correct
12 Correct 439 ms 1264 KB Output is correct
13 Correct 445 ms 1260 KB Output is correct
14 Correct 467 ms 504 KB Output is correct
15 Correct 43 ms 620 KB Output is correct
16 Correct 56 ms 856 KB Output is correct
17 Correct 114 ms 1056 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 832 ms 504 KB Output is correct
2 Correct 563 ms 484 KB Output is correct
3 Correct 572 ms 500 KB Output is correct
4 Correct 2 ms 496 KB Output is correct
5 Correct 4 ms 500 KB Output is correct
6 Correct 2 ms 492 KB Output is correct
7 Correct 592 ms 416 KB Output is correct
8 Correct 856 ms 420 KB Output is correct
9 Correct 630 ms 512 KB Output is correct
10 Correct 539 ms 548 KB Output is correct
11 Correct 5 ms 496 KB Output is correct
12 Correct 5 ms 492 KB Output is correct
13 Correct 3 ms 500 KB Output is correct
14 Correct 2 ms 496 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 473 ms 500 KB Output is correct
17 Correct 519 ms 420 KB Output is correct
18 Correct 436 ms 420 KB Output is correct
19 Correct 442 ms 416 KB Output is correct
20 Correct 469 ms 424 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 502 ms 764 KB Output is correct
2 Correct 452 ms 1012 KB Output is correct
3 Correct 873 ms 420 KB Output is correct
4 Correct 702 ms 420 KB Output is correct
5 Correct 533 ms 504 KB Output is correct
6 Correct 453 ms 1152 KB Output is correct
7 Correct 453 ms 508 KB Output is correct
8 Correct 3 ms 496 KB Output is correct
9 Correct 3 ms 492 KB Output is correct
10 Correct 2 ms 492 KB Output is correct
11 Correct 405 ms 1020 KB Output is correct
12 Correct 562 ms 616 KB Output is correct
13 Correct 767 ms 500 KB Output is correct
14 Correct 701 ms 504 KB Output is correct
15 Correct 823 ms 504 KB Output is correct
16 Correct 481 ms 500 KB Output is correct
17 Correct 649 ms 560 KB Output is correct
18 Correct 463 ms 1100 KB Output is correct
19 Correct 491 ms 1212 KB Output is correct
20 Correct 431 ms 504 KB Output is correct
21 Correct 59 ms 548 KB Output is correct
22 Correct 73 ms 800 KB Output is correct
23 Correct 112 ms 1068 KB Output is correct
24 Correct 7 ms 568 KB Output is correct
25 Correct 4 ms 556 KB Output is correct
26 Correct 4 ms 584 KB Output is correct
27 Correct 1 ms 500 KB Output is correct
28 Correct 2 ms 492 KB Output is correct
29 Correct 499 ms 512 KB Output is correct
30 Correct 548 ms 632 KB Output is correct
31 Correct 399 ms 484 KB Output is correct
32 Correct 514 ms 512 KB Output is correct
33 Correct 538 ms 512 KB Output is correct
34 Correct 315 ms 1072 KB Output is correct
35 Correct 560 ms 1216 KB Output is correct
36 Correct 512 ms 1244 KB Output is correct
37 Correct 432 ms 1008 KB Output is correct
38 Correct 382 ms 1156 KB Output is correct
39 Correct 437 ms 1312 KB Output is correct
40 Correct 433 ms 1356 KB Output is correct
41 Correct 517 ms 1168 KB Output is correct
42 Correct 66 ms 1048 KB Output is correct
43 Correct 132 ms 1144 KB Output is correct
44 Correct 124 ms 1064 KB Output is correct
45 Correct 150 ms 1152 KB Output is correct
46 Correct 292 ms 856 KB Output is correct
47 Correct 427 ms 1008 KB Output is correct
48 Correct 64 ms 1212 KB Output is correct
49 Correct 59 ms 1224 KB Output is correct