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Submission #557592

# Submission time Handle Problem Language Result Execution time Memory
557592 2022-05-05T14:30:48 Z fatemetmhr Toll (BOI17_toll) C++17
46 / 100
 3000 ms 14000 KB 
// `Be name khoda` //

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb     push_back
#define all(x) x.begin(), x.end()
#define fi     first
#define se     second


const int maxn5 = 1e5 + 10;
const int inf   = 1e9;

int ssq   = 3;
int h[maxn5], h2[maxn5], dis[2][maxn5][6];
int av[maxn5], av2[maxn5];
vector <pair<int, int>> jda[maxn5], adj[maxn5];
int k;

inline int get_dis(int a, int b){
    fill(h + a, h + b + 5, inf);
    h[b] = 0;
    for(int i = b; i > a; i--){
        for(auto [u, t] : jda[i])
            h[u] = min(h[u], h[i] + t);
    }
    return h[a];
}

inline void build(int id){
    for(int i = id; i < id + ssq; i++){
        fill(h + id, h + id + ssq + 3, inf);
        h[i] = 0;
        for(int j = i; j < id + ssq; j++) for(auto [u, t] : adj[j])
            h[u] = min(h[u], h[j] + t);
        for(int j = i; j >= id; j--) for(auto [u, t] : jda[j])
            h[u] = min(h[u], h[j] + t);
        for(int j = 0; j < k; j++){
            dis[0][i][j] = h[id + j];
            dis[1][i][j] = h[id + ssq - k + j];
        }
    }
    return;
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

    int n, m, q; cin >> k >> n >> m >> q;
    ssq *= k;
    for(int i = 0; i < m; i++){
        int a, b, t; cin >> a >> b >> t;
        jda[b].pb({a, t});
        adj[a].pb({b, t});
    }
    for(int i = 0; i < n; i+=ssq)
        build(i);
    for(int i = 0; i < q; i++){
        int a, b; cin >> a >> b;
        int cmpa = a / ssq * ssq;
        int cmpb = b / ssq * ssq;
        if(cmpa == cmpb){
            int ans = get_dis(a, b);
            if(ans == inf)
                ans = -1;
            cout << ans << '\n';
            continue;
        }
        for(int i = 0; i < k; i++){ // akhare cmpa
            av[i] = cmpa + ssq - k + i;
            h[i] = dis[1][a][i];
            h2[i] = inf;
        }
        for(int i = 0; i < k; i++) for(auto [u, t] : adj[av[i]])
            h2[u - cmpa - ssq] = min(h2[u - cmpa - ssq], h[i] + t);
        for(int i = 0; i < k; i++){ // avale cmpa + ssq
            av[i] = cmpa + ssq + i;
            h[i] = h2[i];
            h2[i] = inf;
        }
        cmpa += ssq;
        while(cmpa != cmpb){
            //cout << "hey " << cmpa << ' ' << cmpb << endl;
            //for(int i = 0; i < k; i++)
                //cout << av[i] << ' ' << h[i] << endl;
            for(int i = 0; i < k; i++){ // avale cmpa
                av2[i] = cmpa + ssq - k + i;
                h2[i] = inf;
            }
            for(int i = 0; i < k; i++) for(int j = 0; j < k; j++)
                h2[j] = min(h2[j], dis[1][av[i]][j] + h[i]);
            for(int i = 0; i < k; i++){ // akhare cmpa
                av[i] = av2[i];
                h[i] = h2[i];
                h2[i] = inf;
            }
            for(int i = 0; i < k; i++) for(auto [u, t] : adj[av[i]])
                h2[u - cmpa - ssq] = min(h2[u - cmpa - ssq], h[i] + t);
            for(int i = 0; i < k; i++){ // avale cmpa + ssq
                av[i] = cmpa + ssq + i;
                h[i] = h2[i];
            }
            cmpa += ssq;
        }
        int ans = inf;
        for(int i = 0; i < k; i++)
            ans = min(ans, h[i] + dis[0][b][i]);
        if(ans == inf)
            ans = -1;
        cout << ans << '\n';
    }
}

/*
1 11 10 1
0 1 4
1 2 20
2 3 21
3 4 24
4 5 26
5 6 21
6 7 8
7 8 23
8 9 24
9 10 15
0 10
*/

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2039 ms 11652 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 7 ms 5076 KB Output is correct
6 Correct 6 ms 5076 KB Output is correct
7 Correct 7 ms 5076 KB Output is correct
8 Correct 2071 ms 11764 KB Output is correct
9 Correct 1953 ms 11520 KB Output is correct
10 Correct 708 ms 7716 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3006 ms 11744 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5028 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 5024 KB Output is correct
6 Correct 4 ms 5076 KB Output is correct
7 Correct 4 ms 5076 KB Output is correct
8 Correct 6 ms 5372 KB Output is correct
9 Correct 6 ms 5208 KB Output is correct
10 Correct 65 ms 11548 KB Output is correct
11 Correct 73 ms 11668 KB Output is correct
12 Correct 93 ms 13484 KB Output is correct
13 Correct 109 ms 14000 KB Output is correct
14 Correct 87 ms 12776 KB Output is correct
15 Correct 62 ms 10188 KB Output is correct
16 Correct 73 ms 10152 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5028 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5028 KB Output is correct
4 Correct 3 ms 5032 KB Output is correct
5 Correct 3 ms 5024 KB Output is correct
6 Correct 4 ms 5076 KB Output is correct
7 Correct 4 ms 5076 KB Output is correct
8 Correct 6 ms 5372 KB Output is correct
9 Correct 6 ms 5208 KB Output is correct
10 Correct 65 ms 11548 KB Output is correct
11 Correct 73 ms 11668 KB Output is correct
12 Correct 93 ms 13484 KB Output is correct
13 Correct 109 ms 14000 KB Output is correct
14 Correct 87 ms 12776 KB Output is correct
15 Correct 62 ms 10188 KB Output is correct
16 Correct 73 ms 10152 KB Output is correct
17 Correct 613 ms 11832 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 4 ms 5028 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 4 ms 5032 KB Output is correct
23 Correct 12 ms 5204 KB Output is correct
24 Correct 12 ms 5156 KB Output is correct
25 Correct 16 ms 5380 KB Output is correct
26 Correct 13 ms 5164 KB Output is correct
27 Correct 590 ms 11548 KB Output is correct
28 Correct 781 ms 13660 KB Output is correct
29 Correct 827 ms 14000 KB Output is correct
30 Correct 701 ms 12912 KB Output is correct

Subtask #5
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 2039 ms 11652 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 5076 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 7 ms 5076 KB Output is correct
6 Correct 6 ms 5076 KB Output is correct
7 Correct 7 ms 5076 KB Output is correct
8 Correct 2071 ms 11764 KB Output is correct
9 Correct 1953 ms 11520 KB Output is correct
10 Correct 708 ms 7716 KB Output is correct
11 Execution timed out 3006 ms 11744 KB Time limit exceeded
12 Halted 0 ms 0 KB -