oj.uz

답안 #833066

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
833066 2023-08-21T21:54:18 Z idiotcomputer 경주 (Race) (IOI11_race) C++11
100 / 100
 345 ms 102864 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN = 2*1e5;

set<pair<long long int, int>> all[mxN];
int p[mxN];
long long int add[mxN];
long long int a2[mxN];

long long int res;
long long int k;

void upd(int c){
    while (p[c] != p[p[c]]){
        p[c] = p[p[c]];
    }
}

void comb(int a, int b){
    if (all[a].size() > all[b].size()){
        swap(a,b);
    }
    
    for (auto it = all[a].begin(); it != all[a].end(); it++){
        long long int val = (*it).first + add[a] - add[b];
        int nl = (*it).second + a2[a] - a2[b];
        long long int needed = k - val - 2*add[b];
        
        auto it2 = all[b].lower_bound({needed,-1 * 1e9});
        if ((it2 != all[b].end()) && ((*it2).first == needed)){
            res = min(res, nl + (*it2).second + 2 * a2[b]);
        }
        
       // all[b].insert({val,nl});
       // cout << "HERERE " << a << " "<<b<< ": " << val+add[b] << " " << nl + a2[b] <<'\n';
    }
    for (auto it = all[a].begin(); it != all[a].end(); it++){
        long long int val = (*it).first + add[a] - add[b];
        int nl = (*it).second + a2[a] - a2[b];
        all[b].insert({val,nl});
    }
    
    
    p[a] = b;
    
}

void dfs(int node, int parent, vector<vector<pair<int, long long int>>> &connect){
    p[node] = node;
    add[node] = 0;
    a2[node] = 0;
    all[node].clear();
    int next;
    for (int i =0; i < connect[node].size(); i++){
        next = connect[node][i].first;
        if (next == parent){
            continue;
        }
        dfs(next,node,connect);
        upd(node);
        upd(next);
        int a= p[node];
        int b = p[next];
        add[b] += connect[node][i].second;
        a2[b] += 1;
        auto it = all[b].lower_bound({k-add[b],-1*1e9});
        if ((it != all[b].end()) && ((*it).first == k-add[b])){
            res = min(res, (*it).second + a2[b]);
        }
        comb(a,b);
    }
    upd(node);
    all[p[node]].insert({-1*add[p[node]],-1*a2[p[node]]});
  /*  cout<< node << ":\n";
    for (auto it = all[p[node]].begin(); it != all[p[node]].end(); it++){
        cout << (*it).first+add[p[node]] << "," << (*it).second+a2[p[node]] << ' ';
    }
    cout << '\n';*/
}

int best_path(int n,int ck, int h[][2], int l[]){
    if (ck == 0){
        return 0;
    }
    vector<vector<pair<int,long long int>>> connect(n);
    k = ck;
    
    for (int i =0; i < n-1; i++){
        connect[h[i][0]].push_back({h[i][1],l[i]});
        connect[h[i][1]].push_back({h[i][0],l[i]});
    }
    
  /*  for (int i =0; i < n; i++){
        cout << i << ": ";
        for (int j = 0; j < connect[i].size();j++){
            cout<<connect[i][j].first<<","<<connect[i][j].second<<"  ";
        }
        cout<<'\n';
    }*/
    
    res = 1e9;
    dfs(0,-1,connect);
    if (res == 1e9){
        return -1;
    }
    return res;
}

Compilation message

race.cpp: In function 'void dfs(int, int, std::vector<std::vector<std::pair<int, long long int> > >&)':
race.cpp:55:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |     for (int i =0; i < connect[node].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9752 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 4 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 4 ms 9684 KB Output is correct
9 Correct 4 ms 9684 KB Output is correct
10 Correct 4 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 4 ms 9684 KB Output is correct
14 Correct 4 ms 9752 KB Output is correct
15 Correct 5 ms 9648 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 4 ms 9684 KB Output is correct
18 Correct 4 ms 9684 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9752 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 4 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 4 ms 9684 KB Output is correct
9 Correct 4 ms 9684 KB Output is correct
10 Correct 4 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 4 ms 9684 KB Output is correct
14 Correct 4 ms 9752 KB Output is correct
15 Correct 5 ms 9648 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 4 ms 9684 KB Output is correct
18 Correct 4 ms 9684 KB Output is correct
19 Correct 4 ms 9684 KB Output is correct
20 Correct 4 ms 9684 KB Output is correct
21 Correct 5 ms 9940 KB Output is correct
22 Correct 5 ms 9940 KB Output is correct
23 Correct 5 ms 9940 KB Output is correct
24 Correct 5 ms 9940 KB Output is correct
25 Correct 6 ms 10068 KB Output is correct
26 Correct 6 ms 9940 KB Output is correct
27 Correct 6 ms 9824 KB Output is correct
28 Correct 6 ms 9940 KB Output is correct
29 Correct 5 ms 9940 KB Output is correct
30 Correct 5 ms 9940 KB Output is correct
31 Correct 5 ms 9940 KB Output is correct
32 Correct 5 ms 9940 KB Output is correct
33 Correct 5 ms 9940 KB Output is correct
34 Correct 5 ms 9940 KB Output is correct
35 Correct 5 ms 9940 KB Output is correct
36 Correct 5 ms 9940 KB Output is correct
37 Correct 5 ms 9812 KB Output is correct
38 Correct 5 ms 9900 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9752 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 4 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 4 ms 9684 KB Output is correct
9 Correct 4 ms 9684 KB Output is correct
10 Correct 4 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 4 ms 9684 KB Output is correct
14 Correct 4 ms 9752 KB Output is correct
15 Correct 5 ms 9648 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 4 ms 9684 KB Output is correct
18 Correct 4 ms 9684 KB Output is correct
19 Correct 111 ms 36428 KB Output is correct
20 Correct 113 ms 36368 KB Output is correct
21 Correct 118 ms 36000 KB Output is correct
22 Correct 112 ms 34988 KB Output is correct
23 Correct 136 ms 49856 KB Output is correct
24 Correct 100 ms 38360 KB Output is correct
25 Correct 92 ms 35560 KB Output is correct
26 Correct 73 ms 38572 KB Output is correct
27 Correct 150 ms 47288 KB Output is correct
28 Correct 193 ms 67544 KB Output is correct
29 Correct 187 ms 66648 KB Output is correct
30 Correct 178 ms 47280 KB Output is correct
31 Correct 152 ms 47180 KB Output is correct
32 Correct 201 ms 47196 KB Output is correct
33 Correct 152 ms 42732 KB Output is correct
34 Correct 247 ms 74664 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9752 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 4 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 4 ms 9684 KB Output is correct
7 Correct 4 ms 9684 KB Output is correct
8 Correct 4 ms 9684 KB Output is correct
9 Correct 4 ms 9684 KB Output is correct
10 Correct 4 ms 9684 KB Output is correct
11 Correct 6 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 4 ms 9684 KB Output is correct
14 Correct 4 ms 9752 KB Output is correct
15 Correct 5 ms 9648 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 4 ms 9684 KB Output is correct
18 Correct 4 ms 9684 KB Output is correct
19 Correct 4 ms 9684 KB Output is correct
20 Correct 4 ms 9684 KB Output is correct
21 Correct 5 ms 9940 KB Output is correct
22 Correct 5 ms 9940 KB Output is correct
23 Correct 5 ms 9940 KB Output is correct
24 Correct 5 ms 9940 KB Output is correct
25 Correct 6 ms 10068 KB Output is correct
26 Correct 6 ms 9940 KB Output is correct
27 Correct 6 ms 9824 KB Output is correct
28 Correct 6 ms 9940 KB Output is correct
29 Correct 5 ms 9940 KB Output is correct
30 Correct 5 ms 9940 KB Output is correct
31 Correct 5 ms 9940 KB Output is correct
32 Correct 5 ms 9940 KB Output is correct
33 Correct 5 ms 9940 KB Output is correct
34 Correct 5 ms 9940 KB Output is correct
35 Correct 5 ms 9940 KB Output is correct
36 Correct 5 ms 9940 KB Output is correct
37 Correct 5 ms 9812 KB Output is correct
38 Correct 5 ms 9900 KB Output is correct
39 Correct 111 ms 36428 KB Output is correct
40 Correct 113 ms 36368 KB Output is correct
41 Correct 118 ms 36000 KB Output is correct
42 Correct 112 ms 34988 KB Output is correct
43 Correct 136 ms 49856 KB Output is correct
44 Correct 100 ms 38360 KB Output is correct
45 Correct 92 ms 35560 KB Output is correct
46 Correct 73 ms 38572 KB Output is correct
47 Correct 150 ms 47288 KB Output is correct
48 Correct 193 ms 67544 KB Output is correct
49 Correct 187 ms 66648 KB Output is correct
50 Correct 178 ms 47280 KB Output is correct
51 Correct 152 ms 47180 KB Output is correct
52 Correct 201 ms 47196 KB Output is correct
53 Correct 152 ms 42732 KB Output is correct
54 Correct 247 ms 74664 KB Output is correct
55 Correct 15 ms 13140 KB Output is correct
56 Correct 11 ms 11856 KB Output is correct
57 Correct 62 ms 31868 KB Output is correct
58 Correct 45 ms 26172 KB Output is correct
59 Correct 69 ms 38732 KB Output is correct
60 Correct 186 ms 66912 KB Output is correct
61 Correct 178 ms 52920 KB Output is correct
62 Correct 146 ms 47224 KB Output is correct
63 Correct 201 ms 47244 KB Output is correct
64 Correct 343 ms 102864 KB Output is correct
65 Correct 345 ms 99496 KB Output is correct
66 Correct 206 ms 67840 KB Output is correct
67 Correct 141 ms 46068 KB Output is correct
68 Correct 244 ms 67052 KB Output is correct
69 Correct 279 ms 72684 KB Output is correct
70 Correct 245 ms 64644 KB Output is correct