oj.uz

Submission #583238

# Submission time Handle Problem Language Result Execution time Memory
583238 2022-06-25T06:29:36 Z LucaIlie Stations (IOI20_stations) C++17
100 / 100
 1033 ms 812 KB 
#include "stations.h"
#include <bits/stdc++.h>

#define MAX_N 1000

using namespace std;

int l;
int lc[MAX_N], rc[MAX_N];
vector<int> edges[MAX_N];
vector<int> labels, c;

void dfs( int u, int p, int d ) {
    if ( d == 0 )
        labels[u] = l / 2;
    l++;
    for ( int v: edges[u] ) {
        if ( v != p )
            dfs( v, u, 1 - d );
    }
    if ( d == 1 )
        labels[u] = l / 2;
    l++;
}

vector<int> label( int n, int k, vector<int> u, vector<int> v ) {
    for ( int i = 0; i < n; i++ )
        edges[i].clear();
    for ( int i = 0; i < n - 1; i++ ) {
        edges[u[i]].push_back( v[i] );
        edges[v[i]].push_back( u[i] );
    }

    labels.resize( n );
    l = 0;
    dfs( 0, -1, 0 );

    return labels;
}

int find_next_station( int s, int t, vector<int> e ) {
    int ls, rs, ds, p, l, h, i;

    l = h = 0;
    for ( int x: e ) {
        if ( x < s )
            l++;
        else
            h++;
    }

    ds = (l == 0 ? 0 : 1);
    s = s * 2;
    t = t * 2;
    p = 0;
    c.clear();
    if ( ds == 0 ) {
        if ( s == 0 )
            c = e;
        else {
            p = e.back();
            for ( i = 0; i < e.size() - 1; i++ )
                c.push_back( e[i] );
        }
        ls = s;
        rs = c.back() * 2 + 1;
        for ( i = 0; i < c.size(); i++ )
            rc[i] = c[i] * 2;
        lc[0] = ls + 1;
        for ( i = 1; i < c.size(); i++ )
            lc[i] = rc[i - 1] + 1;
    } else {
        if ( s == 0 )
            c = e;
        else {
            p = e.front();
            for ( i = 1; i < e.size(); i++ )
                c.push_back( e[i] );
        }
        ls = c.front() * 2 - 1;
        rs = s;
        for ( i = 0; i < c.size(); i++ )
            lc[i] = c[i] * 2;
        for ( i = 0; i + 1 < c.size(); i++ )
            rc[i] = lc[i + 1] - 1;
        rc[c.size() - 1] = rs - 1;
    }

    for ( i = 0; i < c.size(); i++ ) {
        if ( lc[i] <= t && t <= rc[i] )
            return c[i];
    }
    return p;
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:62:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |             for ( i = 0; i < e.size() - 1; i++ )
      |                          ~~^~~~~~~~~~~~~~
stations.cpp:67:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |         for ( i = 0; i < c.size(); i++ )
      |                      ~~^~~~~~~~~~
stations.cpp:70:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |         for ( i = 1; i < c.size(); i++ )
      |                      ~~^~~~~~~~~~
stations.cpp:77:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |             for ( i = 1; i < e.size(); i++ )
      |                          ~~^~~~~~~~~~
stations.cpp:82:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |         for ( i = 0; i < c.size(); i++ )
      |                      ~~^~~~~~~~~~
stations.cpp:84:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         for ( i = 0; i + 1 < c.size(); i++ )
      |                      ~~~~~~^~~~~~~~~~
stations.cpp:89:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     for ( i = 0; i < c.size(); i++ ) {
      |                  ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 526 ms 788 KB Output is correct
2 Correct 467 ms 652 KB Output is correct
3 Correct 1033 ms 548 KB Output is correct
4 Correct 756 ms 532 KB Output is correct
5 Correct 660 ms 544 KB Output is correct
6 Correct 431 ms 660 KB Output is correct
7 Correct 452 ms 532 KB Output is correct
8 Correct 2 ms 500 KB Output is correct
9 Correct 3 ms 492 KB Output is correct
10 Correct 2 ms 500 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 459 ms 672 KB Output is correct
2 Correct 523 ms 528 KB Output is correct
3 Correct 987 ms 416 KB Output is correct
4 Correct 769 ms 416 KB Output is correct
5 Correct 718 ms 416 KB Output is correct
6 Correct 494 ms 544 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 531 ms 652 KB Output is correct
2 Correct 463 ms 520 KB Output is correct
3 Correct 894 ms 420 KB Output is correct
4 Correct 631 ms 528 KB Output is correct
5 Correct 675 ms 416 KB Output is correct
6 Correct 422 ms 652 KB Output is correct
7 Correct 433 ms 548 KB Output is correct
8 Correct 3 ms 496 KB Output is correct
9 Correct 5 ms 500 KB Output is correct
10 Correct 2 ms 492 KB Output is correct
11 Correct 677 ms 416 KB Output is correct
12 Correct 479 ms 736 KB Output is correct
13 Correct 464 ms 664 KB Output is correct
14 Correct 491 ms 544 KB Output is correct
15 Correct 60 ms 748 KB Output is correct
16 Correct 67 ms 748 KB Output is correct
17 Correct 117 ms 676 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 829 ms 416 KB Output is correct
2 Correct 697 ms 416 KB Output is correct
3 Correct 587 ms 528 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 3 ms 492 KB Output is correct
6 Correct 1 ms 500 KB Output is correct
7 Correct 652 ms 656 KB Output is correct
8 Correct 820 ms 656 KB Output is correct
9 Correct 755 ms 416 KB Output is correct
10 Correct 648 ms 416 KB Output is correct
11 Correct 6 ms 548 KB Output is correct
12 Correct 4 ms 488 KB Output is correct
13 Correct 6 ms 696 KB Output is correct
14 Correct 4 ms 492 KB Output is correct
15 Correct 2 ms 724 KB Output is correct
16 Correct 477 ms 524 KB Output is correct
17 Correct 457 ms 656 KB Output is correct
18 Correct 804 ms 420 KB Output is correct
19 Correct 546 ms 524 KB Output is correct
20 Correct 536 ms 660 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 628 ms 812 KB Output is correct
2 Correct 350 ms 636 KB Output is correct
3 Correct 929 ms 524 KB Output is correct
4 Correct 788 ms 416 KB Output is correct
5 Correct 540 ms 708 KB Output is correct
6 Correct 515 ms 528 KB Output is correct
7 Correct 475 ms 528 KB Output is correct
8 Correct 3 ms 492 KB Output is correct
9 Correct 4 ms 608 KB Output is correct
10 Correct 1 ms 496 KB Output is correct
11 Correct 445 ms 524 KB Output is correct
12 Correct 626 ms 544 KB Output is correct
13 Correct 1008 ms 416 KB Output is correct
14 Correct 761 ms 528 KB Output is correct
15 Correct 628 ms 416 KB Output is correct
16 Correct 419 ms 548 KB Output is correct
17 Correct 533 ms 544 KB Output is correct
18 Correct 578 ms 624 KB Output is correct
19 Correct 490 ms 652 KB Output is correct
20 Correct 547 ms 524 KB Output is correct
21 Correct 90 ms 420 KB Output is correct
22 Correct 84 ms 672 KB Output is correct
23 Correct 116 ms 804 KB Output is correct
24 Correct 7 ms 620 KB Output is correct
25 Correct 5 ms 652 KB Output is correct
26 Correct 5 ms 492 KB Output is correct
27 Correct 3 ms 492 KB Output is correct
28 Correct 2 ms 500 KB Output is correct
29 Correct 443 ms 532 KB Output is correct
30 Correct 565 ms 432 KB Output is correct
31 Correct 532 ms 416 KB Output is correct
32 Correct 456 ms 528 KB Output is correct
33 Correct 588 ms 528 KB Output is correct
34 Correct 315 ms 620 KB Output is correct
35 Correct 420 ms 656 KB Output is correct
36 Correct 409 ms 656 KB Output is correct
37 Correct 481 ms 764 KB Output is correct
38 Correct 445 ms 652 KB Output is correct
39 Correct 410 ms 572 KB Output is correct
40 Correct 360 ms 660 KB Output is correct
41 Correct 385 ms 668 KB Output is correct
42 Correct 52 ms 672 KB Output is correct
43 Correct 112 ms 724 KB Output is correct
44 Correct 115 ms 656 KB Output is correct
45 Correct 186 ms 672 KB Output is correct
46 Correct 321 ms 576 KB Output is correct
47 Correct 315 ms 548 KB Output is correct
48 Correct 54 ms 716 KB Output is correct
49 Correct 41 ms 764 KB Output is correct