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Submission #770605

# Submission time Handle Problem Language Result Execution time Memory
770605 2023-07-01T14:09:28 Z MEGalodon Toll (BOI17_toll) C++14
100 / 100
 126 ms 11888 KB 
#include <bits/stdc++.h>
#define MAXN 50001
#define INF 100000000000000
#define ii pair<int, int>
#define iii pair<ii, int>
#define ll long long
using namespace std;
ll dist[MAXN][5][5];
ll ans[MAXN];
int K, N, M, O;
ll weights[5][5][MAXN];
void dnc(int l, int r, vector<iii> q){
    if( l == r ){
        for( auto x : q ) ans[x.second] = -1;
        return;
    }
    int m = (l+r)/2;
    for( int i{0} ; i < K ; ++i ) for( int j{0} ; j < K ; ++j ){
        if( i == j ) dist[m][i][j] = 0;//, dist[m+1][i][j] = 0;
        else dist[m][i][j] = INF;//, dist[m+1][i][j] = INF;
    }
    for( int lev{m-1} ; lev >= l ; --lev ){
        for( int i{0} ; i < K ; ++i ) for( int k{0} ; k < K ; ++k ){
            dist[lev][i][k] = INF;
            for( int j{0} ; j < K ; ++j ){
                dist[lev][i][k] = min(dist[lev+1][j][k]+weights[i][j][lev], dist[lev][i][k]);
            }
        }
    }
    for( int lev{m+1} ; lev <= r ; ++lev ){
        for( int i{0} ; i < K ; ++i ) for( int k{0} ; k < K ; ++k ){
            dist[lev][i][k] = INF;
            for( int j{0} ; j < K ; ++j ){
                dist[lev][i][k] = min(dist[lev-1][i][j]+weights[j][k][lev-1], dist[lev][i][k]);
            }
        }
    }
    vector<iii> lft, rght;
    for( auto x : q ){
        int a = x.first.first, b = x.first.second;
        int id = x.second;
        int l1 = a/K, l2 = b/K;
        a %= K; b %= K;
        if( l1 <= m && l2 >= m ){
            ans[id] = INF;
            for( int c{0} ; c < K ; ++c ) ans[id] = min(ans[id], dist[l1][a][c]+dist[l2][c][b]);
        }
        else if( l2 <= m ) lft.push_back(x);
        else rght.push_back(x);
    }
    dnc(l, m, lft);
    dnc(m+1, r, rght);
}
int main(){
    cin>>K>>N>>M>>O;
    for( int i{0} ; i < K ; ++i ) for( int j{0} ; j < K ; ++j ) for( int k{0} ; k < (N-1)/K ; ++k ) weights[i][j][k] = INF;
    for( int i{1} ; i <= M ; ++i ){ //multi edges??
        int u, v, w;
        cin>>u>>v>>w;
        int lev = u/K;
        u %= K; v %= K;
        weights[u][v][lev] = w;
    }
    vector<iii> queries;
    for( int i{1} ; i <= O ; ++i ){
        int u, v;
        cin>>u>>v;
        queries.push_back(iii(ii(u, v), i));
    }
    dnc(0, (N-1)/K, queries);
    for( int i{1} ; i <= O ; ++i ){
        if( ans[i] < INF ) cout<<ans[i]<<'\n';
        else cout<<"-1\n";
    }
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 11844 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 580 KB Output is correct
8 Correct 42 ms 11888 KB Output is correct
9 Correct 39 ms 11760 KB Output is correct
10 Correct 12 ms 11012 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 8192 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 5 ms 1172 KB Output is correct
8 Correct 5 ms 1172 KB Output is correct
9 Correct 38 ms 11884 KB Output is correct
10 Correct 86 ms 7584 KB Output is correct
11 Correct 66 ms 8324 KB Output is correct
12 Correct 53 ms 6668 KB Output is correct
13 Correct 92 ms 5304 KB Output is correct
14 Correct 55 ms 4624 KB Output is correct
15 Correct 51 ms 4120 KB Output is correct
16 Correct 52 ms 4044 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 308 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 3 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 34 ms 11216 KB Output is correct
11 Correct 63 ms 7484 KB Output is correct
12 Correct 81 ms 6884 KB Output is correct
13 Correct 91 ms 7136 KB Output is correct
14 Correct 70 ms 6496 KB Output is correct
15 Correct 53 ms 3872 KB Output is correct
16 Correct 51 ms 3880 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 308 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 3 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 34 ms 11216 KB Output is correct
11 Correct 63 ms 7484 KB Output is correct
12 Correct 81 ms 6884 KB Output is correct
13 Correct 91 ms 7136 KB Output is correct
14 Correct 70 ms 6496 KB Output is correct
15 Correct 53 ms 3872 KB Output is correct
16 Correct 51 ms 3880 KB Output is correct
17 Correct 66 ms 7736 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 2 ms 596 KB Output is correct
24 Correct 3 ms 596 KB Output is correct
25 Correct 4 ms 724 KB Output is correct
26 Correct 3 ms 596 KB Output is correct
27 Correct 37 ms 11436 KB Output is correct
28 Correct 83 ms 7128 KB Output is correct
29 Correct 121 ms 7396 KB Output is correct
30 Correct 72 ms 6776 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 11844 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 580 KB Output is correct
8 Correct 42 ms 11888 KB Output is correct
9 Correct 39 ms 11760 KB Output is correct
10 Correct 12 ms 11012 KB Output is correct
11 Correct 61 ms 8192 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 5 ms 1172 KB Output is correct
18 Correct 5 ms 1172 KB Output is correct
19 Correct 38 ms 11884 KB Output is correct
20 Correct 86 ms 7584 KB Output is correct
21 Correct 66 ms 8324 KB Output is correct
22 Correct 53 ms 6668 KB Output is correct
23 Correct 92 ms 5304 KB Output is correct
24 Correct 55 ms 4624 KB Output is correct
25 Correct 51 ms 4120 KB Output is correct
26 Correct 52 ms 4044 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 308 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 3 ms 468 KB Output is correct
35 Correct 2 ms 468 KB Output is correct
36 Correct 34 ms 11216 KB Output is correct
37 Correct 63 ms 7484 KB Output is correct
38 Correct 81 ms 6884 KB Output is correct
39 Correct 91 ms 7136 KB Output is correct
40 Correct 70 ms 6496 KB Output is correct
41 Correct 53 ms 3872 KB Output is correct
42 Correct 51 ms 3880 KB Output is correct
43 Correct 66 ms 7736 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 0 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 2 ms 596 KB Output is correct
50 Correct 3 ms 596 KB Output is correct
51 Correct 4 ms 724 KB Output is correct
52 Correct 3 ms 596 KB Output is correct
53 Correct 37 ms 11436 KB Output is correct
54 Correct 83 ms 7128 KB Output is correct
55 Correct 121 ms 7396 KB Output is correct
56 Correct 72 ms 6776 KB Output is correct
57 Correct 126 ms 8132 KB Output is correct
58 Correct 40 ms 11784 KB Output is correct
59 Correct 66 ms 8196 KB Output is correct