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답안 #528019

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
528019 2022-02-19T02:23:24 Z 79brue From Hacks to Snitches (BOI21_watchmen) C++14
35 / 100
 5392 ms 128292 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

using namespace std;

typedef long long ll;
const int LIM = 1600;

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];

queue<dat> pq[LIM+5];

inline 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[tmp.y%LIM].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));
    for(int d=0; ; d+=LIM){
        bool exist = 0;
        for(int e=0; e<LIM; e++){
            while(!pq[e].empty()){
                exist=1;
                dat tmp = pq[e].front(); pq[e].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));
                            for(int i=0; i<(int)visited[nxt].size(); i++) visited[nxt][i] = 1;
                        }
                    }
                }
                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));
                        }
                    }
                }
            }
        }
        if(!exist) break;
    }

    printf("impossible");
}

Compilation message

watchmen.cpp: In function 'int main()':
watchmen.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
watchmen.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         scanf("%d %d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~
watchmen.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     scanf("%d", &k);
      |     ~~~~~^~~~~~~~~~
watchmen.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         scanf("%d", &l);
      |         ~~~~~^~~~~~~~~~
watchmen.cpp:52:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |             scanf("%d", &tmp);
      |             ~~~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 96 ms 33452 KB Output is correct
3 Correct 81 ms 32452 KB Output is correct
4 Correct 85 ms 32548 KB Output is correct
5 Correct 13 ms 22944 KB Output is correct
6 Correct 87 ms 32580 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 98 ms 33420 KB Output is correct
3 Correct 83 ms 32536 KB Output is correct
4 Correct 83 ms 32580 KB Output is correct
5 Correct 12 ms 22884 KB Output is correct
6 Correct 84 ms 32480 KB Output is correct
7 Correct 85 ms 32452 KB Output is correct
8 Correct 82 ms 32428 KB Output is correct
9 Correct 90 ms 32480 KB Output is correct
10 Correct 78 ms 32580 KB Output is correct
11 Correct 84 ms 32516 KB Output is correct
12 Correct 87 ms 32496 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 98 ms 33420 KB Output is correct
3 Correct 83 ms 32536 KB Output is correct
4 Correct 83 ms 32580 KB Output is correct
5 Correct 12 ms 22884 KB Output is correct
6 Correct 84 ms 32480 KB Output is correct
7 Correct 85 ms 32452 KB Output is correct
8 Correct 82 ms 32428 KB Output is correct
9 Correct 90 ms 32480 KB Output is correct
10 Correct 78 ms 32580 KB Output is correct
11 Correct 84 ms 32516 KB Output is correct
12 Correct 87 ms 32496 KB Output is correct
13 Correct 32 ms 24276 KB Output is correct
14 Correct 94 ms 33364 KB Output is correct
15 Correct 84 ms 32452 KB Output is correct
16 Correct 89 ms 32580 KB Output is correct
17 Correct 13 ms 22936 KB Output is correct
18 Correct 85 ms 32520 KB Output is correct
19 Correct 86 ms 32468 KB Output is correct
20 Correct 98 ms 32484 KB Output is correct
21 Correct 86 ms 32416 KB Output is correct
22 Correct 84 ms 32644 KB Output is correct
23 Correct 81 ms 32788 KB Output is correct
24 Correct 81 ms 32468 KB Output is correct
25 Correct 1588 ms 80556 KB Output is correct
26 Correct 1497 ms 84884 KB Output is correct
27 Correct 1409 ms 81364 KB Output is correct
28 Correct 1163 ms 85148 KB Output is correct
29 Correct 2324 ms 76660 KB Output is correct
30 Correct 2346 ms 85356 KB Output is correct
31 Correct 1653 ms 84376 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 98 ms 33420 KB Output is correct
3 Correct 83 ms 32536 KB Output is correct
4 Correct 83 ms 32580 KB Output is correct
5 Correct 12 ms 22884 KB Output is correct
6 Correct 84 ms 32480 KB Output is correct
7 Correct 85 ms 32452 KB Output is correct
8 Correct 82 ms 32428 KB Output is correct
9 Correct 90 ms 32480 KB Output is correct
10 Correct 78 ms 32580 KB Output is correct
11 Correct 84 ms 32516 KB Output is correct
12 Correct 87 ms 32496 KB Output is correct
13 Correct 32 ms 24276 KB Output is correct
14 Correct 94 ms 33364 KB Output is correct
15 Correct 84 ms 32452 KB Output is correct
16 Correct 89 ms 32580 KB Output is correct
17 Correct 13 ms 22936 KB Output is correct
18 Correct 85 ms 32520 KB Output is correct
19 Correct 86 ms 32468 KB Output is correct
20 Correct 98 ms 32484 KB Output is correct
21 Correct 86 ms 32416 KB Output is correct
22 Correct 84 ms 32644 KB Output is correct
23 Correct 81 ms 32788 KB Output is correct
24 Correct 81 ms 32468 KB Output is correct
25 Correct 1588 ms 80556 KB Output is correct
26 Correct 1497 ms 84884 KB Output is correct
27 Correct 1409 ms 81364 KB Output is correct
28 Correct 1163 ms 85148 KB Output is correct
29 Correct 2324 ms 76660 KB Output is correct
30 Correct 2346 ms 85356 KB Output is correct
31 Correct 1653 ms 84376 KB Output is correct
32 Correct 32 ms 24388 KB Output is correct
33 Correct 96 ms 34020 KB Output is correct
34 Correct 84 ms 33180 KB Output is correct
35 Correct 82 ms 33288 KB Output is correct
36 Correct 12 ms 22960 KB Output is correct
37 Correct 82 ms 33204 KB Output is correct
38 Correct 83 ms 33092 KB Output is correct
39 Correct 93 ms 33092 KB Output is correct
40 Correct 85 ms 33140 KB Output is correct
41 Correct 78 ms 33296 KB Output is correct
42 Correct 77 ms 33176 KB Output is correct
43 Correct 81 ms 33092 KB Output is correct
44 Correct 1583 ms 80668 KB Output is correct
45 Correct 1549 ms 85144 KB Output is correct
46 Correct 1424 ms 81188 KB Output is correct
47 Correct 1182 ms 84804 KB Output is correct
48 Correct 2277 ms 76124 KB Output is correct
49 Correct 2299 ms 78068 KB Output is correct
50 Correct 1611 ms 84120 KB Output is correct
51 Correct 1846 ms 89968 KB Output is correct
52 Correct 1859 ms 100236 KB Output is correct
53 Correct 1450 ms 89716 KB Output is correct
54 Correct 1190 ms 114072 KB Output is correct
55 Correct 5392 ms 128292 KB Output is correct
56 Correct 4355 ms 120384 KB Output is correct

Subtask #5
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 96 ms 33452 KB Output is correct
3 Correct 81 ms 32452 KB Output is correct
4 Correct 85 ms 32548 KB Output is correct
5 Correct 13 ms 22944 KB Output is correct
6 Correct 87 ms 32580 KB Output is correct
7 Correct 32 ms 24260 KB Output is correct
8 Correct 98 ms 33420 KB Output is correct
9 Correct 83 ms 32536 KB Output is correct
10 Correct 83 ms 32580 KB Output is correct
11 Correct 12 ms 22884 KB Output is correct
12 Correct 84 ms 32480 KB Output is correct
13 Correct 85 ms 32452 KB Output is correct
14 Correct 82 ms 32428 KB Output is correct
15 Correct 90 ms 32480 KB Output is correct
16 Correct 78 ms 32580 KB Output is correct
17 Correct 84 ms 32516 KB Output is correct
18 Correct 87 ms 32496 KB Output is correct
19 Correct 12 ms 22880 KB Output is correct
20 Correct 12 ms 22780 KB Output is correct
21 Correct 12 ms 22860 KB Output is correct
22 Correct 34 ms 24052 KB Output is correct
23 Correct 102 ms 33344 KB Output is correct
24 Correct 87 ms 32324 KB Output is correct
25 Correct 87 ms 32340 KB Output is correct
26 Correct 13 ms 22860 KB Output is correct
27 Correct 83 ms 32324 KB Output is correct
28 Correct 91 ms 32240 KB Output is correct
29 Correct 91 ms 32232 KB Output is correct
30 Correct 88 ms 32300 KB Output is correct
31 Correct 79 ms 32324 KB Output is correct
32 Correct 83 ms 32332 KB Output is correct
33 Correct 82 ms 32268 KB Output is correct
34 Correct 1602 ms 80476 KB Output is correct
35 Correct 1654 ms 76900 KB Output is correct
36 Correct 1675 ms 76928 KB Output is correct
37 Incorrect 1420 ms 82416 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 96 ms 33452 KB Output is correct
3 Correct 81 ms 32452 KB Output is correct
4 Correct 85 ms 32548 KB Output is correct
5 Correct 13 ms 22944 KB Output is correct
6 Correct 87 ms 32580 KB Output is correct
7 Correct 32 ms 24260 KB Output is correct
8 Correct 98 ms 33420 KB Output is correct
9 Correct 83 ms 32536 KB Output is correct
10 Correct 83 ms 32580 KB Output is correct
11 Correct 12 ms 22884 KB Output is correct
12 Correct 84 ms 32480 KB Output is correct
13 Correct 85 ms 32452 KB Output is correct
14 Correct 82 ms 32428 KB Output is correct
15 Correct 90 ms 32480 KB Output is correct
16 Correct 78 ms 32580 KB Output is correct
17 Correct 84 ms 32516 KB Output is correct
18 Correct 87 ms 32496 KB Output is correct
19 Correct 32 ms 24276 KB Output is correct
20 Correct 94 ms 33364 KB Output is correct
21 Correct 84 ms 32452 KB Output is correct
22 Correct 89 ms 32580 KB Output is correct
23 Correct 13 ms 22936 KB Output is correct
24 Correct 85 ms 32520 KB Output is correct
25 Correct 86 ms 32468 KB Output is correct
26 Correct 98 ms 32484 KB Output is correct
27 Correct 86 ms 32416 KB Output is correct
28 Correct 84 ms 32644 KB Output is correct
29 Correct 81 ms 32788 KB Output is correct
30 Correct 81 ms 32468 KB Output is correct
31 Correct 1588 ms 80556 KB Output is correct
32 Correct 1497 ms 84884 KB Output is correct
33 Correct 1409 ms 81364 KB Output is correct
34 Correct 1163 ms 85148 KB Output is correct
35 Correct 2324 ms 76660 KB Output is correct
36 Correct 2346 ms 85356 KB Output is correct
37 Correct 1653 ms 84376 KB Output is correct
38 Correct 12 ms 22880 KB Output is correct
39 Correct 12 ms 22780 KB Output is correct
40 Correct 12 ms 22860 KB Output is correct
41 Correct 34 ms 24052 KB Output is correct
42 Correct 102 ms 33344 KB Output is correct
43 Correct 87 ms 32324 KB Output is correct
44 Correct 87 ms 32340 KB Output is correct
45 Correct 13 ms 22860 KB Output is correct
46 Correct 83 ms 32324 KB Output is correct
47 Correct 91 ms 32240 KB Output is correct
48 Correct 91 ms 32232 KB Output is correct
49 Correct 88 ms 32300 KB Output is correct
50 Correct 79 ms 32324 KB Output is correct
51 Correct 83 ms 32332 KB Output is correct
52 Correct 82 ms 32268 KB Output is correct
53 Correct 1602 ms 80476 KB Output is correct
54 Correct 1654 ms 76900 KB Output is correct
55 Correct 1675 ms 76928 KB Output is correct
56 Incorrect 1420 ms 82416 KB Output isn't correct
57 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 24260 KB Output is correct
2 Correct 96 ms 33452 KB Output is correct
3 Correct 81 ms 32452 KB Output is correct
4 Correct 85 ms 32548 KB Output is correct
5 Correct 13 ms 22944 KB Output is correct
6 Correct 87 ms 32580 KB Output is correct
7 Correct 32 ms 24260 KB Output is correct
8 Correct 98 ms 33420 KB Output is correct
9 Correct 83 ms 32536 KB Output is correct
10 Correct 83 ms 32580 KB Output is correct
11 Correct 12 ms 22884 KB Output is correct
12 Correct 84 ms 32480 KB Output is correct
13 Correct 85 ms 32452 KB Output is correct
14 Correct 82 ms 32428 KB Output is correct
15 Correct 90 ms 32480 KB Output is correct
16 Correct 78 ms 32580 KB Output is correct
17 Correct 84 ms 32516 KB Output is correct
18 Correct 87 ms 32496 KB Output is correct
19 Correct 32 ms 24276 KB Output is correct
20 Correct 94 ms 33364 KB Output is correct
21 Correct 84 ms 32452 KB Output is correct
22 Correct 89 ms 32580 KB Output is correct
23 Correct 13 ms 22936 KB Output is correct
24 Correct 85 ms 32520 KB Output is correct
25 Correct 86 ms 32468 KB Output is correct
26 Correct 98 ms 32484 KB Output is correct
27 Correct 86 ms 32416 KB Output is correct
28 Correct 84 ms 32644 KB Output is correct
29 Correct 81 ms 32788 KB Output is correct
30 Correct 81 ms 32468 KB Output is correct
31 Correct 1588 ms 80556 KB Output is correct
32 Correct 1497 ms 84884 KB Output is correct
33 Correct 1409 ms 81364 KB Output is correct
34 Correct 1163 ms 85148 KB Output is correct
35 Correct 2324 ms 76660 KB Output is correct
36 Correct 2346 ms 85356 KB Output is correct
37 Correct 1653 ms 84376 KB Output is correct
38 Correct 32 ms 24388 KB Output is correct
39 Correct 96 ms 34020 KB Output is correct
40 Correct 84 ms 33180 KB Output is correct
41 Correct 82 ms 33288 KB Output is correct
42 Correct 12 ms 22960 KB Output is correct
43 Correct 82 ms 33204 KB Output is correct
44 Correct 83 ms 33092 KB Output is correct
45 Correct 93 ms 33092 KB Output is correct
46 Correct 85 ms 33140 KB Output is correct
47 Correct 78 ms 33296 KB Output is correct
48 Correct 77 ms 33176 KB Output is correct
49 Correct 81 ms 33092 KB Output is correct
50 Correct 1583 ms 80668 KB Output is correct
51 Correct 1549 ms 85144 KB Output is correct
52 Correct 1424 ms 81188 KB Output is correct
53 Correct 1182 ms 84804 KB Output is correct
54 Correct 2277 ms 76124 KB Output is correct
55 Correct 2299 ms 78068 KB Output is correct
56 Correct 1611 ms 84120 KB Output is correct
57 Correct 1846 ms 89968 KB Output is correct
58 Correct 1859 ms 100236 KB Output is correct
59 Correct 1450 ms 89716 KB Output is correct
60 Correct 1190 ms 114072 KB Output is correct
61 Correct 5392 ms 128292 KB Output is correct
62 Correct 4355 ms 120384 KB Output is correct
63 Correct 12 ms 22880 KB Output is correct
64 Correct 12 ms 22780 KB Output is correct
65 Correct 12 ms 22860 KB Output is correct
66 Correct 34 ms 24052 KB Output is correct
67 Correct 102 ms 33344 KB Output is correct
68 Correct 87 ms 32324 KB Output is correct
69 Correct 87 ms 32340 KB Output is correct
70 Correct 13 ms 22860 KB Output is correct
71 Correct 83 ms 32324 KB Output is correct
72 Correct 91 ms 32240 KB Output is correct
73 Correct 91 ms 32232 KB Output is correct
74 Correct 88 ms 32300 KB Output is correct
75 Correct 79 ms 32324 KB Output is correct
76 Correct 83 ms 32332 KB Output is correct
77 Correct 82 ms 32268 KB Output is correct
78 Correct 1602 ms 80476 KB Output is correct
79 Correct 1654 ms 76900 KB Output is correct
80 Correct 1675 ms 76928 KB Output is correct
81 Incorrect 1420 ms 82416 KB Output isn't correct
82 Halted 0 ms 0 KB -