oj.uz

Submission #354218

# Submission time Handle Problem Language Result Execution time Memory
354218 2021-01-21T14:53:19 Z xt0r3 Race (IOI11_race) C++14
100 / 100
 1093 ms 39276 KB 
#include<bits/stdc++.h>
#include "race.h"
 
using namespace std;
 
constexpr int MAXN = 2*1e5 + 5, MAXK = 1e6 + 5, INF = 1e8;
bool visited[MAXN];
int c[MAXN], k, mini[MAXK];
vector<int> edges[MAXN], w[MAXN];
 
int cnt(int id){
    visited[id] = 1;
    c[id] = 1;
    for(int v : edges[id]) if(!visited[v]) c[id] += cnt(v);
    visited[id] = 0;
    return c[id];
}
 
int init(int id, int n, int p = -1){
    for(int v : edges[id]) if(c[v] > n/2 && !visited[v] && p != v) return init(v, n, id);
    return id;
}
 
int centroid(int id){
    return init(id, cnt(id));
}
 
int calc(int id, int len, int lvl = 1, int p = -1){
    int ret = INF;
    if(len <= k) ret = min(ret, mini[k-len] + lvl);
    for(int i = 0; i < edges[id].size(); i++){
        int v = edges[id][i];
        if(!visited[v] && v != p) ret = min(ret, calc(v, min(INF, len + w[id][i]), lvl + 1, id));
    }
    return ret;
}
 
void add(int id, int len, int lvl = 1, int p = -1){
    if(len < MAXK) mini[len] = min(mini[len], lvl);
    for(int i = 0; i < edges[id].size(); i++){
        int v = edges[id][i];
        if(!visited[v] && p != v) add(v, min(INF, len + w[id][i]), lvl + 1, id);
    }
}
 
void res(int id, int len = 0, int p = -1){
    if(len < MAXK) mini[len] = INF;
    for(int i = 0; i < edges[id].size(); i++){
        int v = edges[id][i];
        if(!visited[v] && p != v) res(v, min(INF, len + w[id][i]), id);
    }
}
 
int db(int id){
    int ret = INF;
    mini[0] = 0;
    for(int i = 0; i < edges[id].size(); i++){
        int v = edges[id][i];
        if(visited[v]) continue;
        ret = min(ret, calc(v, w[id][i], 1, id));
        add(v, w[id][i], 1, id);
    }
    res(id);
    return ret;
}
 
int process(int id){
    int ret = db(id);
    visited[id] = 1;
    for(int v : edges[id]) if(!visited[v]) ret = min(ret, process(centroid(v)));
    return ret;
}
 
 
 
int best_path(int N, int K, int H[][2], int L[])
{
    fill(mini, mini + MAXK, INF);
    k = K;
    for(int i = 0; i < N-1; i++){
        edges[H[i][0]].push_back(H[i][1]);
        w[H[i][0]].push_back(L[i]);
        swap(H[i][0], H[i][1]);
        edges[H[i][0]].push_back(H[i][1]);
        w[H[i][0]].push_back(L[i]);
    }
    int ret = process(centroid(0));
    return (ret == INF ? -1 : ret);
}

Compilation message

race.cpp: In function 'int calc(int, int, int, int)':
race.cpp:31:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i = 0; i < edges[id].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~
race.cpp: In function 'void add(int, int, int, int)':
race.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for(int i = 0; i < edges[id].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~
race.cpp: In function 'void res(int, int, int)':
race.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for(int i = 0; i < edges[id].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~
race.cpp: In function 'int db(int)':
race.cpp:57:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for(int i = 0; i < edges[id].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 13676 KB Output is correct
2 Correct 10 ms 13628 KB Output is correct
3 Correct 9 ms 13676 KB Output is correct
4 Correct 9 ms 13628 KB Output is correct
5 Correct 10 ms 13676 KB Output is correct
6 Correct 9 ms 13676 KB Output is correct
7 Correct 10 ms 13676 KB Output is correct
8 Correct 12 ms 13676 KB Output is correct
9 Correct 11 ms 13676 KB Output is correct
10 Correct 12 ms 13676 KB Output is correct
11 Correct 9 ms 13676 KB Output is correct
12 Correct 9 ms 13676 KB Output is correct
13 Correct 9 ms 13676 KB Output is correct
14 Correct 12 ms 13676 KB Output is correct
15 Correct 9 ms 13688 KB Output is correct
16 Correct 9 ms 13676 KB Output is correct
17 Correct 9 ms 13676 KB Output is correct
18 Correct 11 ms 13676 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 13676 KB Output is correct
2 Correct 10 ms 13628 KB Output is correct
3 Correct 9 ms 13676 KB Output is correct
4 Correct 9 ms 13628 KB Output is correct
5 Correct 10 ms 13676 KB Output is correct
6 Correct 9 ms 13676 KB Output is correct
7 Correct 10 ms 13676 KB Output is correct
8 Correct 12 ms 13676 KB Output is correct
9 Correct 11 ms 13676 KB Output is correct
10 Correct 12 ms 13676 KB Output is correct
11 Correct 9 ms 13676 KB Output is correct
12 Correct 9 ms 13676 KB Output is correct
13 Correct 9 ms 13676 KB Output is correct
14 Correct 12 ms 13676 KB Output is correct
15 Correct 9 ms 13688 KB Output is correct
16 Correct 9 ms 13676 KB Output is correct
17 Correct 9 ms 13676 KB Output is correct
18 Correct 11 ms 13676 KB Output is correct
19 Correct 8 ms 13620 KB Output is correct
20 Correct 11 ms 13676 KB Output is correct
21 Correct 13 ms 13684 KB Output is correct
22 Correct 10 ms 13804 KB Output is correct
23 Correct 10 ms 13804 KB Output is correct
24 Correct 10 ms 13804 KB Output is correct
25 Correct 11 ms 13804 KB Output is correct
26 Correct 14 ms 13804 KB Output is correct
27 Correct 10 ms 13804 KB Output is correct
28 Correct 12 ms 13804 KB Output is correct
29 Correct 10 ms 13804 KB Output is correct
30 Correct 10 ms 13804 KB Output is correct
31 Correct 10 ms 13804 KB Output is correct
32 Correct 13 ms 13804 KB Output is correct
33 Correct 10 ms 13804 KB Output is correct
34 Correct 10 ms 13804 KB Output is correct
35 Correct 10 ms 13804 KB Output is correct
36 Correct 11 ms 13804 KB Output is correct
37 Correct 13 ms 13804 KB Output is correct
38 Correct 11 ms 13676 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 13676 KB Output is correct
2 Correct 10 ms 13628 KB Output is correct
3 Correct 9 ms 13676 KB Output is correct
4 Correct 9 ms 13628 KB Output is correct
5 Correct 10 ms 13676 KB Output is correct
6 Correct 9 ms 13676 KB Output is correct
7 Correct 10 ms 13676 KB Output is correct
8 Correct 12 ms 13676 KB Output is correct
9 Correct 11 ms 13676 KB Output is correct
10 Correct 12 ms 13676 KB Output is correct
11 Correct 9 ms 13676 KB Output is correct
12 Correct 9 ms 13676 KB Output is correct
13 Correct 9 ms 13676 KB Output is correct
14 Correct 12 ms 13676 KB Output is correct
15 Correct 9 ms 13688 KB Output is correct
16 Correct 9 ms 13676 KB Output is correct
17 Correct 9 ms 13676 KB Output is correct
18 Correct 11 ms 13676 KB Output is correct
19 Correct 356 ms 22124 KB Output is correct
20 Correct 410 ms 22124 KB Output is correct
21 Correct 351 ms 22124 KB Output is correct
22 Correct 316 ms 22252 KB Output is correct
23 Correct 247 ms 21976 KB Output is correct
24 Correct 142 ms 22380 KB Output is correct
25 Correct 322 ms 25964 KB Output is correct
26 Correct 143 ms 26732 KB Output is correct
27 Correct 484 ms 31084 KB Output is correct
28 Correct 1093 ms 39276 KB Output is correct
29 Correct 880 ms 38596 KB Output is correct
30 Correct 387 ms 31084 KB Output is correct
31 Correct 371 ms 31160 KB Output is correct
32 Correct 510 ms 31128 KB Output is correct
33 Correct 660 ms 30044 KB Output is correct
34 Correct 628 ms 30084 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 13676 KB Output is correct
2 Correct 10 ms 13628 KB Output is correct
3 Correct 9 ms 13676 KB Output is correct
4 Correct 9 ms 13628 KB Output is correct
5 Correct 10 ms 13676 KB Output is correct
6 Correct 9 ms 13676 KB Output is correct
7 Correct 10 ms 13676 KB Output is correct
8 Correct 12 ms 13676 KB Output is correct
9 Correct 11 ms 13676 KB Output is correct
10 Correct 12 ms 13676 KB Output is correct
11 Correct 9 ms 13676 KB Output is correct
12 Correct 9 ms 13676 KB Output is correct
13 Correct 9 ms 13676 KB Output is correct
14 Correct 12 ms 13676 KB Output is correct
15 Correct 9 ms 13688 KB Output is correct
16 Correct 9 ms 13676 KB Output is correct
17 Correct 9 ms 13676 KB Output is correct
18 Correct 11 ms 13676 KB Output is correct
19 Correct 8 ms 13620 KB Output is correct
20 Correct 11 ms 13676 KB Output is correct
21 Correct 13 ms 13684 KB Output is correct
22 Correct 10 ms 13804 KB Output is correct
23 Correct 10 ms 13804 KB Output is correct
24 Correct 10 ms 13804 KB Output is correct
25 Correct 11 ms 13804 KB Output is correct
26 Correct 14 ms 13804 KB Output is correct
27 Correct 10 ms 13804 KB Output is correct
28 Correct 12 ms 13804 KB Output is correct
29 Correct 10 ms 13804 KB Output is correct
30 Correct 10 ms 13804 KB Output is correct
31 Correct 10 ms 13804 KB Output is correct
32 Correct 13 ms 13804 KB Output is correct
33 Correct 10 ms 13804 KB Output is correct
34 Correct 10 ms 13804 KB Output is correct
35 Correct 10 ms 13804 KB Output is correct
36 Correct 11 ms 13804 KB Output is correct
37 Correct 13 ms 13804 KB Output is correct
38 Correct 11 ms 13676 KB Output is correct
39 Correct 356 ms 22124 KB Output is correct
40 Correct 410 ms 22124 KB Output is correct
41 Correct 351 ms 22124 KB Output is correct
42 Correct 316 ms 22252 KB Output is correct
43 Correct 247 ms 21976 KB Output is correct
44 Correct 142 ms 22380 KB Output is correct
45 Correct 322 ms 25964 KB Output is correct
46 Correct 143 ms 26732 KB Output is correct
47 Correct 484 ms 31084 KB Output is correct
48 Correct 1093 ms 39276 KB Output is correct
49 Correct 880 ms 38596 KB Output is correct
50 Correct 387 ms 31084 KB Output is correct
51 Correct 371 ms 31160 KB Output is correct
52 Correct 510 ms 31128 KB Output is correct
53 Correct 660 ms 30044 KB Output is correct
54 Correct 628 ms 30084 KB Output is correct
55 Correct 22 ms 14572 KB Output is correct
56 Correct 22 ms 14572 KB Output is correct
57 Correct 133 ms 22124 KB Output is correct
58 Correct 56 ms 22748 KB Output is correct
59 Correct 140 ms 26712 KB Output is correct
60 Correct 875 ms 38868 KB Output is correct
61 Correct 389 ms 31084 KB Output is correct
62 Correct 377 ms 31084 KB Output is correct
63 Correct 518 ms 31212 KB Output is correct
64 Correct 1025 ms 30188 KB Output is correct
65 Correct 818 ms 30416 KB Output is correct
66 Correct 910 ms 37868 KB Output is correct
67 Correct 216 ms 31444 KB Output is correct
68 Correct 524 ms 31212 KB Output is correct
69 Correct 573 ms 31468 KB Output is correct
70 Correct 500 ms 30444 KB Output is correct