oj.uz

Submission #527430

# Submission time Handle Problem Language Result Execution time Memory
527430 2022-02-17T11:38:37 Z 79brue From Hacks to Snitches (BOI21_watchmen) C++14
15 / 100
 6000 ms 86000 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

struct dat{
    int x, f, y;
    dat(){}
    dat(int x, int f, int y): x(x), f(f), y(y){}

    bool operator<(const dat &r)const{
        return y>r.y;
    }
};

int n, m, k;
vector<int> link[250002];
int cycleLen[250002];
int cycleIdx[250002];
vector<int> dist[250002];
vector<bool> visited[250002];
priority_queue<dat> pq;

void update(dat tmp){
    if(visited[tmp.x][tmp.f]) return;
    visited[tmp.x][tmp.f] = 1;
    dist[tmp.x][tmp.f] = tmp.y;
    pq.push(tmp);
}

int main(){
    scanf("%d %d", &n, &m);
    for(int i=1; i<=m; i++){
        int x, y;
        scanf("%d %d", &x, &y);
        link[x].push_back(y);
        link[y].push_back(x);
    }

    scanf("%d", &k);
    while(k--){
        int l;
        scanf("%d", &l);
        for(int j=0; j<l; j++){
            int tmp;
            scanf("%d", &tmp);
            cycleLen[tmp] = l;
            cycleIdx[tmp] = j;
        }
    }

    for(int i=1; i<=n; i++){
        if(!cycleLen[i]) cycleLen[i] = 1;
        dist[i] = vector<int> (cycleLen[i], 1e9);
        visited[i].resize(cycleLen[i]);
    }

    update(dat(1, 0, 0));
    while(!pq.empty()){
        dat tmp = pq.top(); pq.pop();
        int x = tmp.x, f = tmp.f, y = tmp.y;
        assert(f < cycleLen[x]);

        if(x==n){
            printf("%d", y);
            return 0;
        }

        if(cycleLen[x] == 1){
            for(int nxt: link[x]){
                if(cycleLen[nxt] == 1) update(dat(nxt, 0, y+1));
                else{
                    if(cycleIdx[nxt] != (y+1)%cycleLen[nxt]) update(dat(nxt, (y+1)%cycleLen[nxt], y+1));
                    int tn = (y+1-cycleIdx[nxt]-1+cycleLen[nxt]-1) / cycleLen[nxt] * cycleLen[nxt] + cycleIdx[nxt]+1;
                    update(dat(nxt, tn%cycleLen[nxt], tn));
                }
            }
        }
        else{
            for(int nxt: link[x]){
                if(cycleLen[nxt] == 1) update(dat(nxt, 0, y+1));
                else{
                    int nf = (f+1)%cycleLen[nxt];
                    if(nf == cycleIdx[nxt]) continue;
                    if(nf == cycleIdx[x] && f%cycleLen[nxt] == cycleIdx[nxt]) continue;
                    update(dat(nxt, nf, y+1));
                }
            }
        }
    }

    printf("impossible");
}

Compilation message

watchmen.cpp: In function 'int main()':
watchmen.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
watchmen.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         scanf("%d %d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~
watchmen.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     scanf("%d", &k);
      |     ~~~~~^~~~~~~~~~
watchmen.cpp:44:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |         scanf("%d", &l);
      |         ~~~~~^~~~~~~~~~
watchmen.cpp:47:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |             scanf("%d", &tmp);
      |             ~~~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 23236 KB Output is correct
2 Correct 93 ms 32972 KB Output is correct
3 Correct 91 ms 32192 KB Output is correct
4 Correct 166 ms 32312 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 124 ms 32204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 23308 KB Output is correct
2 Correct 93 ms 33060 KB Output is correct
3 Correct 106 ms 32288 KB Output is correct
4 Correct 168 ms 32400 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 106 ms 32376 KB Output is correct
7 Correct 88 ms 32136 KB Output is correct
8 Correct 95 ms 32232 KB Output is correct
9 Correct 90 ms 32132 KB Output is correct
10 Correct 139 ms 32372 KB Output is correct
11 Correct 106 ms 32176 KB Output is correct
12 Correct 96 ms 32196 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 23308 KB Output is correct
2 Correct 93 ms 33060 KB Output is correct
3 Correct 106 ms 32288 KB Output is correct
4 Correct 168 ms 32400 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 106 ms 32376 KB Output is correct
7 Correct 88 ms 32136 KB Output is correct
8 Correct 95 ms 32232 KB Output is correct
9 Correct 90 ms 32132 KB Output is correct
10 Correct 139 ms 32372 KB Output is correct
11 Correct 106 ms 32176 KB Output is correct
12 Correct 96 ms 32196 KB Output is correct
13 Correct 35 ms 23244 KB Output is correct
14 Correct 96 ms 33064 KB Output is correct
15 Correct 99 ms 32248 KB Output is correct
16 Correct 168 ms 32460 KB Output is correct
17 Correct 12 ms 21800 KB Output is correct
18 Correct 94 ms 32260 KB Output is correct
19 Correct 90 ms 32220 KB Output is correct
20 Correct 100 ms 32192 KB Output is correct
21 Correct 87 ms 32184 KB Output is correct
22 Correct 146 ms 32332 KB Output is correct
23 Correct 99 ms 32248 KB Output is correct
24 Correct 92 ms 32176 KB Output is correct
25 Correct 2673 ms 81548 KB Output is correct
26 Correct 2253 ms 86000 KB Output is correct
27 Correct 2061 ms 81596 KB Output is correct
28 Correct 1555 ms 85840 KB Output is correct
29 Execution timed out 6085 ms 76852 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 23308 KB Output is correct
2 Correct 93 ms 33060 KB Output is correct
3 Correct 106 ms 32288 KB Output is correct
4 Correct 168 ms 32400 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 106 ms 32376 KB Output is correct
7 Correct 88 ms 32136 KB Output is correct
8 Correct 95 ms 32232 KB Output is correct
9 Correct 90 ms 32132 KB Output is correct
10 Correct 139 ms 32372 KB Output is correct
11 Correct 106 ms 32176 KB Output is correct
12 Correct 96 ms 32196 KB Output is correct
13 Correct 35 ms 23244 KB Output is correct
14 Correct 96 ms 33064 KB Output is correct
15 Correct 99 ms 32248 KB Output is correct
16 Correct 168 ms 32460 KB Output is correct
17 Correct 12 ms 21800 KB Output is correct
18 Correct 94 ms 32260 KB Output is correct
19 Correct 90 ms 32220 KB Output is correct
20 Correct 100 ms 32192 KB Output is correct
21 Correct 87 ms 32184 KB Output is correct
22 Correct 146 ms 32332 KB Output is correct
23 Correct 99 ms 32248 KB Output is correct
24 Correct 92 ms 32176 KB Output is correct
25 Correct 2673 ms 81548 KB Output is correct
26 Correct 2253 ms 86000 KB Output is correct
27 Correct 2061 ms 81596 KB Output is correct
28 Correct 1555 ms 85840 KB Output is correct
29 Execution timed out 6085 ms 76852 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 23236 KB Output is correct
2 Correct 93 ms 32972 KB Output is correct
3 Correct 91 ms 32192 KB Output is correct
4 Correct 166 ms 32312 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 124 ms 32204 KB Output is correct
7 Correct 33 ms 23308 KB Output is correct
8 Correct 93 ms 33060 KB Output is correct
9 Correct 106 ms 32288 KB Output is correct
10 Correct 168 ms 32400 KB Output is correct
11 Correct 12 ms 21836 KB Output is correct
12 Correct 106 ms 32376 KB Output is correct
13 Correct 88 ms 32136 KB Output is correct
14 Correct 95 ms 32232 KB Output is correct
15 Correct 90 ms 32132 KB Output is correct
16 Correct 139 ms 32372 KB Output is correct
17 Correct 106 ms 32176 KB Output is correct
18 Correct 96 ms 32196 KB Output is correct
19 Correct 11 ms 21808 KB Output is correct
20 Correct 10 ms 21832 KB Output is correct
21 Correct 11 ms 21784 KB Output is correct
22 Correct 28 ms 23368 KB Output is correct
23 Correct 92 ms 32968 KB Output is correct
24 Correct 96 ms 32272 KB Output is correct
25 Correct 181 ms 32400 KB Output is correct
26 Correct 15 ms 21836 KB Output is correct
27 Correct 102 ms 32244 KB Output is correct
28 Correct 107 ms 32140 KB Output is correct
29 Correct 87 ms 32160 KB Output is correct
30 Correct 99 ms 32148 KB Output is correct
31 Correct 155 ms 32448 KB Output is correct
32 Correct 96 ms 32252 KB Output is correct
33 Correct 92 ms 32192 KB Output is correct
34 Correct 2696 ms 81072 KB Output is correct
35 Correct 2670 ms 77440 KB Output is correct
36 Correct 2653 ms 77232 KB Output is correct
37 Incorrect 2067 ms 82564 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 23236 KB Output is correct
2 Correct 93 ms 32972 KB Output is correct
3 Correct 91 ms 32192 KB Output is correct
4 Correct 166 ms 32312 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 124 ms 32204 KB Output is correct
7 Correct 33 ms 23308 KB Output is correct
8 Correct 93 ms 33060 KB Output is correct
9 Correct 106 ms 32288 KB Output is correct
10 Correct 168 ms 32400 KB Output is correct
11 Correct 12 ms 21836 KB Output is correct
12 Correct 106 ms 32376 KB Output is correct
13 Correct 88 ms 32136 KB Output is correct
14 Correct 95 ms 32232 KB Output is correct
15 Correct 90 ms 32132 KB Output is correct
16 Correct 139 ms 32372 KB Output is correct
17 Correct 106 ms 32176 KB Output is correct
18 Correct 96 ms 32196 KB Output is correct
19 Correct 35 ms 23244 KB Output is correct
20 Correct 96 ms 33064 KB Output is correct
21 Correct 99 ms 32248 KB Output is correct
22 Correct 168 ms 32460 KB Output is correct
23 Correct 12 ms 21800 KB Output is correct
24 Correct 94 ms 32260 KB Output is correct
25 Correct 90 ms 32220 KB Output is correct
26 Correct 100 ms 32192 KB Output is correct
27 Correct 87 ms 32184 KB Output is correct
28 Correct 146 ms 32332 KB Output is correct
29 Correct 99 ms 32248 KB Output is correct
30 Correct 92 ms 32176 KB Output is correct
31 Correct 2673 ms 81548 KB Output is correct
32 Correct 2253 ms 86000 KB Output is correct
33 Correct 2061 ms 81596 KB Output is correct
34 Correct 1555 ms 85840 KB Output is correct
35 Execution timed out 6085 ms 76852 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 23236 KB Output is correct
2 Correct 93 ms 32972 KB Output is correct
3 Correct 91 ms 32192 KB Output is correct
4 Correct 166 ms 32312 KB Output is correct
5 Correct 12 ms 21836 KB Output is correct
6 Correct 124 ms 32204 KB Output is correct
7 Correct 33 ms 23308 KB Output is correct
8 Correct 93 ms 33060 KB Output is correct
9 Correct 106 ms 32288 KB Output is correct
10 Correct 168 ms 32400 KB Output is correct
11 Correct 12 ms 21836 KB Output is correct
12 Correct 106 ms 32376 KB Output is correct
13 Correct 88 ms 32136 KB Output is correct
14 Correct 95 ms 32232 KB Output is correct
15 Correct 90 ms 32132 KB Output is correct
16 Correct 139 ms 32372 KB Output is correct
17 Correct 106 ms 32176 KB Output is correct
18 Correct 96 ms 32196 KB Output is correct
19 Correct 35 ms 23244 KB Output is correct
20 Correct 96 ms 33064 KB Output is correct
21 Correct 99 ms 32248 KB Output is correct
22 Correct 168 ms 32460 KB Output is correct
23 Correct 12 ms 21800 KB Output is correct
24 Correct 94 ms 32260 KB Output is correct
25 Correct 90 ms 32220 KB Output is correct
26 Correct 100 ms 32192 KB Output is correct
27 Correct 87 ms 32184 KB Output is correct
28 Correct 146 ms 32332 KB Output is correct
29 Correct 99 ms 32248 KB Output is correct
30 Correct 92 ms 32176 KB Output is correct
31 Correct 2673 ms 81548 KB Output is correct
32 Correct 2253 ms 86000 KB Output is correct
33 Correct 2061 ms 81596 KB Output is correct
34 Correct 1555 ms 85840 KB Output is correct
35 Execution timed out 6085 ms 76852 KB Time limit exceeded
36 Halted 0 ms 0 KB -