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Submission #749178

# Submission time Handle Problem Language Result Execution time Memory
749178 2023-05-27T12:57:06 Z 이동현(#9963) From Hacks to Snitches (BOI21_watchmen) C++17
15 / 100
 6000 ms 261436 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#define int long long
using namespace std;

const int NS = 250004;
int n, m, k;
vector<int> way[NS];
int dist[NS][2], period[NS], col[NS], st[NS], num[NS];
vector<int> vc;
int vcdist[2754][2754][2];

struct Node{
    int x, y, z;
    Node(){}
    Node(int x, int y, int z):x(x), y(y), z(z){}
};

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

    cin >> n >> m;
    for(int i = 0; i < m; ++i){
        int x, y;
        cin >> x >> y;
        --x, --y;
        way[x].push_back(y);
        way[y].push_back(x);
    }

    cin >> k;
    for(int i = 0; i < k; ++i){
        int l;
        cin >> l;
        for(int j = 0; j < l; ++j){
            int x;
            cin >> x;
            --x;
            num[x] = (int)vc.size();
            vc.push_back(x);
            col[x] = i + 1;
            st[x] = j;
            period[x] = l;
        }
    }

    queue<Node> que;
    for(int i = 0; i < n; ++i){
        dist[i][0] = dist[i][1] = (int)1e9;
    }
    for(int i = 0; i < 2754; ++i){
        for(int j = 0; j < 2754; ++j){
            vcdist[i][j][0] = vcdist[i][j][1] = (int)1e9;
        }
    }
    dist[0][1] = 0;
    que.push(Node(0, -1, 1));

    while(!que.empty()){
        int now = que.front().x, t = que.front().y, z = que.front().z;
        if(now == n - 1){
            cout << dist[now][z] << '\n';
            return 0;
        }
        if(col[now]){
            //cout << now + 1 << ' ' << t << ' ' << z << ' ' << (int)vcdist[num[now]][t][z] << endl;
        }
        que.pop();

        if(t == -1){
            if(z == 1){
                if(dist[now][1] + 1 < dist[now][0]){
                    dist[now][0] = dist[now][1] + 1;
                    que.push(Node(now, -1, 0));
                }
            }
            for(auto&nxt:way[now]){
                //cout << now << ' ' << nxt << ' ' << col[nxt] << endl;
                if(!col[nxt]){
                    if(dist[now][z] + 1 < dist[nxt][1]){
                        dist[nxt][1] = dist[now][z] + 1;
                        que.push(Node(nxt, -1, 1));
                    }
                }
                else{
                    int md = (st[nxt] - dist[now][z] % period[nxt] - 1 + period[nxt] * 2) % period[nxt];
                    if(md != 0){
                        if(dist[now][z] + 1 < vcdist[num[nxt]][md][1]){
                            vcdist[num[nxt]][md][1] = dist[now][z] + 1;
                            que.push(Node(nxt, md, 1));
                        }
                    }
                }
            }
        }
        else{
            int nd = vcdist[num[now]][t][z];
            if(z == 1 && nd + 1 < vcdist[num[now]][(t - 1 + period[now]) % period[now]][1]){
                vcdist[num[now]][(t - 1 + period[now]) % period[now]][1] = nd + 1;
                que.push(Node(now, (t - 1 + period[now]) % period[now], 1));
            }
            for(auto&nxt:way[now]){
                if(!col[nxt]){
                    if(nd + 1 < dist[nxt][1]){
                        dist[nxt][1] = nd + 1;
                        que.push(Node(nxt, -1, 1));
                    }
                }
                else{
                    int md = (st[nxt] - nd % period[nxt] - 1 + period[nxt] * 2) % period[nxt];
                    if(md != 0){
                        if(md != (period[nxt] - 1) || t != 1){
                            if(t != 0){
                                if(nd + 1 < vcdist[num[nxt]][md][0]){
                                    vcdist[num[nxt]][md][0] = nd + 1;
                                    que.push(Node(nxt, md, 0));
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    cout << "impossible\n";
    
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 127308 KB Output is correct
2 Correct 99 ms 132060 KB Output is correct
3 Correct 94 ms 132296 KB Output is correct
4 Correct 143 ms 132236 KB Output is correct
5 Correct 49 ms 124944 KB Output is correct
6 Correct 91 ms 132268 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 127308 KB Output is correct
2 Correct 97 ms 132100 KB Output is correct
3 Correct 101 ms 132356 KB Output is correct
4 Correct 136 ms 132292 KB Output is correct
5 Correct 49 ms 124872 KB Output is correct
6 Correct 107 ms 132412 KB Output is correct
7 Correct 99 ms 132096 KB Output is correct
8 Correct 99 ms 132164 KB Output is correct
9 Correct 92 ms 132080 KB Output is correct
10 Correct 102 ms 132300 KB Output is correct
11 Correct 101 ms 132288 KB Output is correct
12 Correct 91 ms 132280 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 127308 KB Output is correct
2 Correct 97 ms 132100 KB Output is correct
3 Correct 101 ms 132356 KB Output is correct
4 Correct 136 ms 132292 KB Output is correct
5 Correct 49 ms 124872 KB Output is correct
6 Correct 107 ms 132412 KB Output is correct
7 Correct 99 ms 132096 KB Output is correct
8 Correct 99 ms 132164 KB Output is correct
9 Correct 92 ms 132080 KB Output is correct
10 Correct 102 ms 132300 KB Output is correct
11 Correct 101 ms 132288 KB Output is correct
12 Correct 91 ms 132280 KB Output is correct
13 Correct 59 ms 127416 KB Output is correct
14 Correct 101 ms 132136 KB Output is correct
15 Correct 91 ms 132324 KB Output is correct
16 Correct 148 ms 132428 KB Output is correct
17 Correct 45 ms 124972 KB Output is correct
18 Correct 98 ms 132360 KB Output is correct
19 Correct 103 ms 132060 KB Output is correct
20 Correct 90 ms 132124 KB Output is correct
21 Correct 92 ms 132184 KB Output is correct
22 Correct 101 ms 132300 KB Output is correct
23 Correct 88 ms 132240 KB Output is correct
24 Correct 98 ms 132300 KB Output is correct
25 Correct 1429 ms 248828 KB Output is correct
26 Correct 1502 ms 261436 KB Output is correct
27 Correct 1283 ms 250152 KB Output is correct
28 Correct 984 ms 260224 KB Output is correct
29 Correct 5523 ms 237580 KB Output is correct
30 Execution timed out 6064 ms 243908 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 127308 KB Output is correct
2 Correct 97 ms 132100 KB Output is correct
3 Correct 101 ms 132356 KB Output is correct
4 Correct 136 ms 132292 KB Output is correct
5 Correct 49 ms 124872 KB Output is correct
6 Correct 107 ms 132412 KB Output is correct
7 Correct 99 ms 132096 KB Output is correct
8 Correct 99 ms 132164 KB Output is correct
9 Correct 92 ms 132080 KB Output is correct
10 Correct 102 ms 132300 KB Output is correct
11 Correct 101 ms 132288 KB Output is correct
12 Correct 91 ms 132280 KB Output is correct
13 Correct 59 ms 127416 KB Output is correct
14 Correct 101 ms 132136 KB Output is correct
15 Correct 91 ms 132324 KB Output is correct
16 Correct 148 ms 132428 KB Output is correct
17 Correct 45 ms 124972 KB Output is correct
18 Correct 98 ms 132360 KB Output is correct
19 Correct 103 ms 132060 KB Output is correct
20 Correct 90 ms 132124 KB Output is correct
21 Correct 92 ms 132184 KB Output is correct
22 Correct 101 ms 132300 KB Output is correct
23 Correct 88 ms 132240 KB Output is correct
24 Correct 98 ms 132300 KB Output is correct
25 Correct 1429 ms 248828 KB Output is correct
26 Correct 1502 ms 261436 KB Output is correct
27 Correct 1283 ms 250152 KB Output is correct
28 Correct 984 ms 260224 KB Output is correct
29 Correct 5523 ms 237580 KB Output is correct
30 Execution timed out 6064 ms 243908 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 127308 KB Output is correct
2 Correct 99 ms 132060 KB Output is correct
3 Correct 94 ms 132296 KB Output is correct
4 Correct 143 ms 132236 KB Output is correct
5 Correct 49 ms 124944 KB Output is correct
6 Correct 91 ms 132268 KB Output is correct
7 Correct 58 ms 127308 KB Output is correct
8 Correct 97 ms 132100 KB Output is correct
9 Correct 101 ms 132356 KB Output is correct
10 Correct 136 ms 132292 KB Output is correct
11 Correct 49 ms 124872 KB Output is correct
12 Correct 107 ms 132412 KB Output is correct
13 Correct 99 ms 132096 KB Output is correct
14 Correct 99 ms 132164 KB Output is correct
15 Correct 92 ms 132080 KB Output is correct
16 Correct 102 ms 132300 KB Output is correct
17 Correct 101 ms 132288 KB Output is correct
18 Correct 91 ms 132280 KB Output is correct
19 Correct 46 ms 124892 KB Output is correct
20 Correct 47 ms 124876 KB Output is correct
21 Correct 51 ms 124900 KB Output is correct
22 Correct 59 ms 127312 KB Output is correct
23 Correct 102 ms 132140 KB Output is correct
24 Correct 95 ms 132452 KB Output is correct
25 Correct 147 ms 132308 KB Output is correct
26 Correct 46 ms 124884 KB Output is correct
27 Correct 98 ms 132288 KB Output is correct
28 Correct 94 ms 132140 KB Output is correct
29 Correct 93 ms 132104 KB Output is correct
30 Correct 94 ms 132088 KB Output is correct
31 Correct 108 ms 132340 KB Output is correct
32 Correct 99 ms 132164 KB Output is correct
33 Correct 105 ms 132296 KB Output is correct
34 Correct 1454 ms 248804 KB Output is correct
35 Correct 1561 ms 242128 KB Output is correct
36 Correct 1561 ms 241928 KB Output is correct
37 Incorrect 1452 ms 255720 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 127308 KB Output is correct
2 Correct 99 ms 132060 KB Output is correct
3 Correct 94 ms 132296 KB Output is correct
4 Correct 143 ms 132236 KB Output is correct
5 Correct 49 ms 124944 KB Output is correct
6 Correct 91 ms 132268 KB Output is correct
7 Correct 58 ms 127308 KB Output is correct
8 Correct 97 ms 132100 KB Output is correct
9 Correct 101 ms 132356 KB Output is correct
10 Correct 136 ms 132292 KB Output is correct
11 Correct 49 ms 124872 KB Output is correct
12 Correct 107 ms 132412 KB Output is correct
13 Correct 99 ms 132096 KB Output is correct
14 Correct 99 ms 132164 KB Output is correct
15 Correct 92 ms 132080 KB Output is correct
16 Correct 102 ms 132300 KB Output is correct
17 Correct 101 ms 132288 KB Output is correct
18 Correct 91 ms 132280 KB Output is correct
19 Correct 59 ms 127416 KB Output is correct
20 Correct 101 ms 132136 KB Output is correct
21 Correct 91 ms 132324 KB Output is correct
22 Correct 148 ms 132428 KB Output is correct
23 Correct 45 ms 124972 KB Output is correct
24 Correct 98 ms 132360 KB Output is correct
25 Correct 103 ms 132060 KB Output is correct
26 Correct 90 ms 132124 KB Output is correct
27 Correct 92 ms 132184 KB Output is correct
28 Correct 101 ms 132300 KB Output is correct
29 Correct 88 ms 132240 KB Output is correct
30 Correct 98 ms 132300 KB Output is correct
31 Correct 1429 ms 248828 KB Output is correct
32 Correct 1502 ms 261436 KB Output is correct
33 Correct 1283 ms 250152 KB Output is correct
34 Correct 984 ms 260224 KB Output is correct
35 Correct 5523 ms 237580 KB Output is correct
36 Execution timed out 6064 ms 243908 KB Time limit exceeded
37 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 127308 KB Output is correct
2 Correct 99 ms 132060 KB Output is correct
3 Correct 94 ms 132296 KB Output is correct
4 Correct 143 ms 132236 KB Output is correct
5 Correct 49 ms 124944 KB Output is correct
6 Correct 91 ms 132268 KB Output is correct
7 Correct 58 ms 127308 KB Output is correct
8 Correct 97 ms 132100 KB Output is correct
9 Correct 101 ms 132356 KB Output is correct
10 Correct 136 ms 132292 KB Output is correct
11 Correct 49 ms 124872 KB Output is correct
12 Correct 107 ms 132412 KB Output is correct
13 Correct 99 ms 132096 KB Output is correct
14 Correct 99 ms 132164 KB Output is correct
15 Correct 92 ms 132080 KB Output is correct
16 Correct 102 ms 132300 KB Output is correct
17 Correct 101 ms 132288 KB Output is correct
18 Correct 91 ms 132280 KB Output is correct
19 Correct 59 ms 127416 KB Output is correct
20 Correct 101 ms 132136 KB Output is correct
21 Correct 91 ms 132324 KB Output is correct
22 Correct 148 ms 132428 KB Output is correct
23 Correct 45 ms 124972 KB Output is correct
24 Correct 98 ms 132360 KB Output is correct
25 Correct 103 ms 132060 KB Output is correct
26 Correct 90 ms 132124 KB Output is correct
27 Correct 92 ms 132184 KB Output is correct
28 Correct 101 ms 132300 KB Output is correct
29 Correct 88 ms 132240 KB Output is correct
30 Correct 98 ms 132300 KB Output is correct
31 Correct 1429 ms 248828 KB Output is correct
32 Correct 1502 ms 261436 KB Output is correct
33 Correct 1283 ms 250152 KB Output is correct
34 Correct 984 ms 260224 KB Output is correct
35 Correct 5523 ms 237580 KB Output is correct
36 Execution timed out 6064 ms 243908 KB Time limit exceeded
37 Halted 0 ms 0 KB -