oj.uz

답안 #446657

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
446657 2021-07-22T23:30:19 Z Giselus 경주 (Race) (IOI11_race) C++14
100 / 100
 1890 ms 59616 KB 
#include<cstdio>
#include<algorithm>
#include<vector>
#include<map>
#define S 200007

using namespace std;

vector < pair < int , int > > V[S];
int roz[S];
bool deleted[S];

void DFS(int x, int r){
    roz[x] = 1;
    for(int i = 0 ; i < V[x].size();i++){
        if(V[x][i].first != r && !deleted[V[x][i].first]){
            DFS(V[x][i].first,x);
            roz[x] += roz[V[x][i].first];
        }
    }
}

int Find(int x){
    for(int i = 0 ; i < V[x].size();i++){
        if(!deleted[V[x][i].first]){
            if(roz[V[x][i].first] > roz[x]/2){
                roz[x] -= roz[V[x][i].first];
                roz[V[x][i].first] += roz[x];
                return Find(V[x][i].first);
            }
        }
    }
    return x;
}

long long dp[S];
int l = 0;
int L[S];
int R[S];
int ID[S];
int poz[S];

void DFS2(int x, int r){
    L[x] = ++l;
    ID[l] = x;
    for(int i = 0 ; i < V[x].size();i++){
        int v = V[x][i].first;
        int c = V[x][i].second;
        if(v != r && !deleted[v]){
            poz[v] = poz[x] + 1;
            dp[v] = dp[x] + c;
            DFS2(v,x);
        }
    }
    R[x] = l;
}
long long k;
int odp = 1e9;
map < long long , int > mapa;

void decomposition(int x){
    DFS(x,x);
    int centroid = Find(x);
    poz[centroid] = 0;
    dp[centroid] = 0;
    DFS2(centroid,centroid);
    deleted[centroid] = 1;
    for(int i = 0 ; i < V[centroid].size();i++){
        int v = V[centroid][i].first;
        if(!deleted[v]){
            //printf("%d %d %d %d*\n",centroid,v,L[v],R[v]);
            for(int j = L[v]; j <= R[v];j++){
                int v2 = ID[j];
                if(dp[v2] == k){
                    odp = min(odp,poz[v2]);
                    //printf("%d %d$\n",centroid,v2);
                }
                if(mapa[k-dp[v2]]){
                    odp = min(odp, poz[v2] + mapa[k-dp[v2]]);
                    //printf("%d %d$$\n",centroid,v2);
                }
            }
            for(int j = L[v]; j <= R[v];j++){
                int v2 = ID[j];
                if(!mapa[dp[v2]]){
                    mapa[dp[v2]] = poz[v2];
                }else{
                    mapa[dp[v2]] = min(mapa[dp[v2]],poz[v2]);
                }
            }
        }
    }
    l = 0;
    mapa.clear();
    for(int i = 0 ; i < V[centroid].size();i++){
        int v = V[centroid][i].first;
        if(!deleted[v])
            decomposition(v);
    }
}

int best_path(int n, int _k, int H[][2], int L[]){
    k = _k;
    for(int i = 0 ; i < n-1;i++){
        V[H[i][0]+1].push_back({H[i][1]+1,L[i]});
        V[H[i][1]+1].push_back({H[i][0]+1,L[i]});
    }
    decomposition(1);
    if(odp < 1e8)
        return odp;
    return -1;
}

/*
int main(void){
    int A[10][2] = { {0,1}, {0,2}, {2,3}, {3,4}, {4,5}, {0,6}, {6,7}, {6,8}, {8,9}, {8,10}  };
    int B[10] = {3,4,5,4,6,3,2,5,6,7};
    printf("%d",best_path(11,12,A,B));
    return 0;
}
*/

Compilation message

race.cpp: In function 'void DFS(int, int)':
race.cpp:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(int i = 0 ; i < V[x].size();i++){
      |                     ~~^~~~~~~~~~~~~
race.cpp: In function 'int Find(int)':
race.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0 ; i < V[x].size();i++){
      |                     ~~^~~~~~~~~~~~~
race.cpp: In function 'void DFS2(int, int)':
race.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i = 0 ; i < V[x].size();i++){
      |                     ~~^~~~~~~~~~~~~
race.cpp: In function 'void decomposition(int)':
race.cpp:68:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i = 0 ; i < V[centroid].size();i++){
      |                     ~~^~~~~~~~~~~~~~~~~~~~
race.cpp:95:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for(int i = 0 ; i < V[centroid].size();i++){
      |                     ~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4988 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4952 KB Output is correct
11 Correct 3 ms 4964 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4988 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4988 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4952 KB Output is correct
11 Correct 3 ms 4964 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4988 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4988 KB Output is correct
21 Correct 5 ms 5040 KB Output is correct
22 Correct 6 ms 5196 KB Output is correct
23 Correct 6 ms 5196 KB Output is correct
24 Correct 5 ms 5196 KB Output is correct
25 Correct 5 ms 5196 KB Output is correct
26 Correct 5 ms 5196 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 6 ms 5196 KB Output is correct
29 Correct 5 ms 5196 KB Output is correct
30 Correct 6 ms 5136 KB Output is correct
31 Correct 5 ms 5132 KB Output is correct
32 Correct 6 ms 5196 KB Output is correct
33 Correct 6 ms 5196 KB Output is correct
34 Correct 6 ms 5196 KB Output is correct
35 Correct 6 ms 5232 KB Output is correct
36 Correct 5 ms 5196 KB Output is correct
37 Correct 5 ms 5196 KB Output is correct
38 Correct 6 ms 5196 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4988 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4952 KB Output is correct
11 Correct 3 ms 4964 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4988 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 409 ms 14000 KB Output is correct
20 Correct 380 ms 14128 KB Output is correct
21 Correct 358 ms 14052 KB Output is correct
22 Correct 308 ms 14180 KB Output is correct
23 Correct 503 ms 14472 KB Output is correct
24 Correct 227 ms 14300 KB Output is correct
25 Correct 336 ms 17456 KB Output is correct
26 Correct 148 ms 19676 KB Output is correct
27 Correct 446 ms 23816 KB Output is correct
28 Correct 1739 ms 59616 KB Output is correct
29 Correct 1695 ms 58712 KB Output is correct
30 Correct 441 ms 23872 KB Output is correct
31 Correct 439 ms 23796 KB Output is correct
32 Correct 573 ms 23876 KB Output is correct
33 Correct 865 ms 22556 KB Output is correct
34 Correct 1777 ms 48000 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5068 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4988 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4952 KB Output is correct
11 Correct 3 ms 4964 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4988 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4988 KB Output is correct
21 Correct 5 ms 5040 KB Output is correct
22 Correct 6 ms 5196 KB Output is correct
23 Correct 6 ms 5196 KB Output is correct
24 Correct 5 ms 5196 KB Output is correct
25 Correct 5 ms 5196 KB Output is correct
26 Correct 5 ms 5196 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 6 ms 5196 KB Output is correct
29 Correct 5 ms 5196 KB Output is correct
30 Correct 6 ms 5136 KB Output is correct
31 Correct 5 ms 5132 KB Output is correct
32 Correct 6 ms 5196 KB Output is correct
33 Correct 6 ms 5196 KB Output is correct
34 Correct 6 ms 5196 KB Output is correct
35 Correct 6 ms 5232 KB Output is correct
36 Correct 5 ms 5196 KB Output is correct
37 Correct 5 ms 5196 KB Output is correct
38 Correct 6 ms 5196 KB Output is correct
39 Correct 409 ms 14000 KB Output is correct
40 Correct 380 ms 14128 KB Output is correct
41 Correct 358 ms 14052 KB Output is correct
42 Correct 308 ms 14180 KB Output is correct
43 Correct 503 ms 14472 KB Output is correct
44 Correct 227 ms 14300 KB Output is correct
45 Correct 336 ms 17456 KB Output is correct
46 Correct 148 ms 19676 KB Output is correct
47 Correct 446 ms 23816 KB Output is correct
48 Correct 1739 ms 59616 KB Output is correct
49 Correct 1695 ms 58712 KB Output is correct
50 Correct 441 ms 23872 KB Output is correct
51 Correct 439 ms 23796 KB Output is correct
52 Correct 573 ms 23876 KB Output is correct
53 Correct 865 ms 22556 KB Output is correct
54 Correct 1777 ms 48000 KB Output is correct
55 Correct 36 ms 6472 KB Output is correct
56 Correct 22 ms 5912 KB Output is correct
57 Correct 214 ms 14256 KB Output is correct
58 Correct 57 ms 13988 KB Output is correct
59 Correct 501 ms 28764 KB Output is correct
60 Correct 1743 ms 55848 KB Output is correct
61 Correct 519 ms 27204 KB Output is correct
62 Correct 455 ms 23932 KB Output is correct
63 Correct 593 ms 23876 KB Output is correct
64 Correct 1890 ms 36096 KB Output is correct
65 Correct 1723 ms 49060 KB Output is correct
66 Correct 1765 ms 56900 KB Output is correct
67 Correct 203 ms 24368 KB Output is correct
68 Correct 905 ms 45432 KB Output is correct
69 Correct 916 ms 45796 KB Output is correct
70 Correct 854 ms 43616 KB Output is correct