oj.uz

Submission #426056

# Submission time Handle Problem Language Result Execution time Memory
426056 2021-06-13T13:22:42 Z duality From Hacks to Snitches (BOI21_watchmen) C++11
25 / 100
 6000 ms 144092 KB 
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;
int readInt() {
    char c;
    int n = 0;
    while ((c=getchar()) < '0');
    n = c-'0';
    while ((c=getchar()) >= '0') n = n*10+c-'0';
    return n;
}

vi adjList[250000];
int pos[250000];
pair<int,pii> p[250000];
bool comp(int a,int b) {
    return p[a] < p[b];
}
vi dist[250000];
int done[250000],done2[250000];
priority_queue<pii> H;
int main() {
    int i,j;
    int N,M,K;
    int u,v,l;
    scanf("%d %d",&N,&M);
    for (i = 0; i < M; i++) {
        u = readInt();
        v = readInt();
        u--,v--;
        adjList[u].pb(v);
        adjList[v].pb(u);
    }
    scanf("%d",&K);
    for (i = 0; i < K; i++) {
        scanf("%d",&l);
        for (j = 0; j < l; j++) scanf("%d",&v),p[v-1] = mp(l,mp(j,i));
    }

    for (i = 0; i < N; i++) {
        if (p[i].first == 0) p[i].first = 1;
        dist[i].resize(p[i].first);
        fill(dist[i].begin(),dist[i].end(),-1);
        sort(adjList[i].begin(),adjList[i].end(),comp);
        while ((pos[i] < adjList[i].size()) && (p[adjList[i][pos[i]]].first <= 1)) pos[i]++;
    }
    dist[0][0] = 0,H.push(mp(0,0));
    while (!H.empty()) {
        int u = H.top().second;
        int d = -H.top().first;
        H.pop();

        if (d > dist[u][d % p[u].first]) continue;
        else if (u == N-1) {
            printf("%d\n",d);
            return 0;
        }
        i = 0;
        if (done2[u]) i = pos[u];
        for (; i < adjList[u].size(); i++) {
            int v = adjList[u][i],t = d;
            for (j = 0; j < ((p[u].first == 1) ? p[v].first:1); j++) {
                if (done[v] && (p[u].first == 1)) break;
                int bad = 0;
                if (p[v].first != 1) {
                    if (((d+1) % p[v].first) == p[v].second.first) bad = 1;
                    if (((d % p[v].first) == p[v].second.first) && (p[u].second.second == p[v].second.second) \
                        && (p[u].second.first == ((p[v].second.first+1) % p[v].first))) bad = 1;
                }
                if (!bad) {
                    if ((dist[v][(d+1) % p[v].first] == -1) || (d+1 < dist[v][(d+1) % p[v].first])) {
                        dist[v][(d+1) % p[v].first] = d+1;
                        H.push(mp(-(d+1),v));
                    }
                }
                d++;
                if ((p[u].first != 1) && ((d % p[u].first) == p[u].second.first)) break;
            }
            if ((p[u].first == 1) && (p[v].first != 1)) done[v] = 1;
            d = t;
        }
        done2[u] = 1;
    }
    printf("impossible\n");

    return 0;
}

Compilation message

watchmen.cpp: In function 'int main()':
watchmen.cpp:50:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |         while ((pos[i] < adjList[i].size()) && (p[adjList[i][pos[i]]].first <= 1)) pos[i]++;
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~
watchmen.cpp:65:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (; i < adjList[u].size(); i++) {
      |                ~~^~~~~~~~~~~~~~~~~~~
watchmen.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     scanf("%d %d",&N,&M);
      |     ~~~~~^~~~~~~~~~~~~~~
watchmen.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     scanf("%d",&K);
      |     ~~~~~^~~~~~~~~
watchmen.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         scanf("%d",&l);
      |         ~~~~~^~~~~~~~~
watchmen.cpp:42:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |         for (j = 0; j < l; j++) scanf("%d",&v),p[v-1] = mp(l,mp(j,i));
      |                                 ~~~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 13136 KB Output is correct
2 Correct 97 ms 20404 KB Output is correct
3 Correct 88 ms 20024 KB Output is correct
4 Correct 118 ms 20244 KB Output is correct
5 Correct 8 ms 12108 KB Output is correct
6 Correct 82 ms 20008 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 13244 KB Output is correct
2 Correct 102 ms 20332 KB Output is correct
3 Correct 119 ms 20036 KB Output is correct
4 Correct 122 ms 20228 KB Output is correct
5 Correct 8 ms 12080 KB Output is correct
6 Correct 88 ms 20040 KB Output is correct
7 Correct 140 ms 19520 KB Output is correct
8 Correct 105 ms 19764 KB Output is correct
9 Correct 91 ms 19528 KB Output is correct
10 Correct 94 ms 20044 KB Output is correct
11 Correct 85 ms 19820 KB Output is correct
12 Correct 125 ms 19936 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 13244 KB Output is correct
2 Correct 102 ms 20332 KB Output is correct
3 Correct 119 ms 20036 KB Output is correct
4 Correct 122 ms 20228 KB Output is correct
5 Correct 8 ms 12080 KB Output is correct
6 Correct 88 ms 20040 KB Output is correct
7 Correct 140 ms 19520 KB Output is correct
8 Correct 105 ms 19764 KB Output is correct
9 Correct 91 ms 19528 KB Output is correct
10 Correct 94 ms 20044 KB Output is correct
11 Correct 85 ms 19820 KB Output is correct
12 Correct 125 ms 19936 KB Output is correct
13 Correct 23 ms 13268 KB Output is correct
14 Correct 92 ms 20332 KB Output is correct
15 Correct 130 ms 20000 KB Output is correct
16 Correct 158 ms 20192 KB Output is correct
17 Correct 9 ms 12108 KB Output is correct
18 Correct 121 ms 19984 KB Output is correct
19 Correct 109 ms 19580 KB Output is correct
20 Correct 108 ms 19780 KB Output is correct
21 Correct 80 ms 19548 KB Output is correct
22 Correct 131 ms 20036 KB Output is correct
23 Correct 111 ms 19904 KB Output is correct
24 Correct 110 ms 19812 KB Output is correct
25 Correct 2148 ms 64660 KB Output is correct
26 Correct 2208 ms 68896 KB Output is correct
27 Correct 2076 ms 65488 KB Output is correct
28 Correct 1475 ms 68764 KB Output is correct
29 Correct 2258 ms 60604 KB Output is correct
30 Correct 2299 ms 101608 KB Output is correct
31 Correct 2709 ms 107516 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 13244 KB Output is correct
2 Correct 102 ms 20332 KB Output is correct
3 Correct 119 ms 20036 KB Output is correct
4 Correct 122 ms 20228 KB Output is correct
5 Correct 8 ms 12080 KB Output is correct
6 Correct 88 ms 20040 KB Output is correct
7 Correct 140 ms 19520 KB Output is correct
8 Correct 105 ms 19764 KB Output is correct
9 Correct 91 ms 19528 KB Output is correct
10 Correct 94 ms 20044 KB Output is correct
11 Correct 85 ms 19820 KB Output is correct
12 Correct 125 ms 19936 KB Output is correct
13 Correct 23 ms 13268 KB Output is correct
14 Correct 92 ms 20332 KB Output is correct
15 Correct 130 ms 20000 KB Output is correct
16 Correct 158 ms 20192 KB Output is correct
17 Correct 9 ms 12108 KB Output is correct
18 Correct 121 ms 19984 KB Output is correct
19 Correct 109 ms 19580 KB Output is correct
20 Correct 108 ms 19780 KB Output is correct
21 Correct 80 ms 19548 KB Output is correct
22 Correct 131 ms 20036 KB Output is correct
23 Correct 111 ms 19904 KB Output is correct
24 Correct 110 ms 19812 KB Output is correct
25 Correct 2148 ms 64660 KB Output is correct
26 Correct 2208 ms 68896 KB Output is correct
27 Correct 2076 ms 65488 KB Output is correct
28 Correct 1475 ms 68764 KB Output is correct
29 Correct 2258 ms 60604 KB Output is correct
30 Correct 2299 ms 101608 KB Output is correct
31 Correct 2709 ms 107516 KB Output is correct
32 Correct 24 ms 13836 KB Output is correct
33 Correct 112 ms 21480 KB Output is correct
34 Correct 109 ms 21140 KB Output is correct
35 Correct 123 ms 21316 KB Output is correct
36 Correct 8 ms 12240 KB Output is correct
37 Correct 86 ms 21152 KB Output is correct
38 Correct 152 ms 20852 KB Output is correct
39 Correct 84 ms 21124 KB Output is correct
40 Correct 77 ms 20752 KB Output is correct
41 Correct 115 ms 21208 KB Output is correct
42 Correct 115 ms 21060 KB Output is correct
43 Correct 101 ms 20952 KB Output is correct
44 Correct 2427 ms 103308 KB Output is correct
45 Correct 2181 ms 107316 KB Output is correct
46 Correct 2117 ms 104120 KB Output is correct
47 Correct 1697 ms 107448 KB Output is correct
48 Correct 2366 ms 99580 KB Output is correct
49 Correct 2590 ms 101524 KB Output is correct
50 Correct 2847 ms 107320 KB Output is correct
51 Correct 3376 ms 111608 KB Output is correct
52 Correct 3917 ms 122404 KB Output is correct
53 Correct 3343 ms 121044 KB Output is correct
54 Correct 1710 ms 98712 KB Output is correct
55 Execution timed out 6058 ms 144092 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 13136 KB Output is correct
2 Correct 97 ms 20404 KB Output is correct
3 Correct 88 ms 20024 KB Output is correct
4 Correct 118 ms 20244 KB Output is correct
5 Correct 8 ms 12108 KB Output is correct
6 Correct 82 ms 20008 KB Output is correct
7 Correct 23 ms 13244 KB Output is correct
8 Correct 102 ms 20332 KB Output is correct
9 Correct 119 ms 20036 KB Output is correct
10 Correct 122 ms 20228 KB Output is correct
11 Correct 8 ms 12080 KB Output is correct
12 Correct 88 ms 20040 KB Output is correct
13 Correct 140 ms 19520 KB Output is correct
14 Correct 105 ms 19764 KB Output is correct
15 Correct 91 ms 19528 KB Output is correct
16 Correct 94 ms 20044 KB Output is correct
17 Correct 85 ms 19820 KB Output is correct
18 Correct 125 ms 19936 KB Output is correct
19 Correct 8 ms 11980 KB Output is correct
20 Correct 10 ms 12060 KB Output is correct
21 Correct 8 ms 11980 KB Output is correct
22 Correct 26 ms 13728 KB Output is correct
23 Correct 119 ms 20848 KB Output is correct
24 Correct 116 ms 20548 KB Output is correct
25 Correct 134 ms 20760 KB Output is correct
26 Correct 9 ms 12056 KB Output is correct
27 Correct 102 ms 20572 KB Output is correct
28 Correct 123 ms 20164 KB Output is correct
29 Correct 126 ms 20356 KB Output is correct
30 Correct 113 ms 20164 KB Output is correct
31 Correct 131 ms 20516 KB Output is correct
32 Correct 93 ms 20440 KB Output is correct
33 Correct 99 ms 20372 KB Output is correct
34 Correct 2614 ms 65492 KB Output is correct
35 Correct 2976 ms 61832 KB Output is correct
36 Correct 2942 ms 61856 KB Output is correct
37 Incorrect 2103 ms 66992 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 13136 KB Output is correct
2 Correct 97 ms 20404 KB Output is correct
3 Correct 88 ms 20024 KB Output is correct
4 Correct 118 ms 20244 KB Output is correct
5 Correct 8 ms 12108 KB Output is correct
6 Correct 82 ms 20008 KB Output is correct
7 Correct 23 ms 13244 KB Output is correct
8 Correct 102 ms 20332 KB Output is correct
9 Correct 119 ms 20036 KB Output is correct
10 Correct 122 ms 20228 KB Output is correct
11 Correct 8 ms 12080 KB Output is correct
12 Correct 88 ms 20040 KB Output is correct
13 Correct 140 ms 19520 KB Output is correct
14 Correct 105 ms 19764 KB Output is correct
15 Correct 91 ms 19528 KB Output is correct
16 Correct 94 ms 20044 KB Output is correct
17 Correct 85 ms 19820 KB Output is correct
18 Correct 125 ms 19936 KB Output is correct
19 Correct 23 ms 13268 KB Output is correct
20 Correct 92 ms 20332 KB Output is correct
21 Correct 130 ms 20000 KB Output is correct
22 Correct 158 ms 20192 KB Output is correct
23 Correct 9 ms 12108 KB Output is correct
24 Correct 121 ms 19984 KB Output is correct
25 Correct 109 ms 19580 KB Output is correct
26 Correct 108 ms 19780 KB Output is correct
27 Correct 80 ms 19548 KB Output is correct
28 Correct 131 ms 20036 KB Output is correct
29 Correct 111 ms 19904 KB Output is correct
30 Correct 110 ms 19812 KB Output is correct
31 Correct 2148 ms 64660 KB Output is correct
32 Correct 2208 ms 68896 KB Output is correct
33 Correct 2076 ms 65488 KB Output is correct
34 Correct 1475 ms 68764 KB Output is correct
35 Correct 2258 ms 60604 KB Output is correct
36 Correct 2299 ms 101608 KB Output is correct
37 Correct 2709 ms 107516 KB Output is correct
38 Correct 8 ms 11980 KB Output is correct
39 Correct 10 ms 12060 KB Output is correct
40 Correct 8 ms 11980 KB Output is correct
41 Correct 26 ms 13728 KB Output is correct
42 Correct 119 ms 20848 KB Output is correct
43 Correct 116 ms 20548 KB Output is correct
44 Correct 134 ms 20760 KB Output is correct
45 Correct 9 ms 12056 KB Output is correct
46 Correct 102 ms 20572 KB Output is correct
47 Correct 123 ms 20164 KB Output is correct
48 Correct 126 ms 20356 KB Output is correct
49 Correct 113 ms 20164 KB Output is correct
50 Correct 131 ms 20516 KB Output is correct
51 Correct 93 ms 20440 KB Output is correct
52 Correct 99 ms 20372 KB Output is correct
53 Correct 2614 ms 65492 KB Output is correct
54 Correct 2976 ms 61832 KB Output is correct
55 Correct 2942 ms 61856 KB Output is correct
56 Incorrect 2103 ms 66992 KB Output isn't correct
57 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 13136 KB Output is correct
2 Correct 97 ms 20404 KB Output is correct
3 Correct 88 ms 20024 KB Output is correct
4 Correct 118 ms 20244 KB Output is correct
5 Correct 8 ms 12108 KB Output is correct
6 Correct 82 ms 20008 KB Output is correct
7 Correct 23 ms 13244 KB Output is correct
8 Correct 102 ms 20332 KB Output is correct
9 Correct 119 ms 20036 KB Output is correct
10 Correct 122 ms 20228 KB Output is correct
11 Correct 8 ms 12080 KB Output is correct
12 Correct 88 ms 20040 KB Output is correct
13 Correct 140 ms 19520 KB Output is correct
14 Correct 105 ms 19764 KB Output is correct
15 Correct 91 ms 19528 KB Output is correct
16 Correct 94 ms 20044 KB Output is correct
17 Correct 85 ms 19820 KB Output is correct
18 Correct 125 ms 19936 KB Output is correct
19 Correct 23 ms 13268 KB Output is correct
20 Correct 92 ms 20332 KB Output is correct
21 Correct 130 ms 20000 KB Output is correct
22 Correct 158 ms 20192 KB Output is correct
23 Correct 9 ms 12108 KB Output is correct
24 Correct 121 ms 19984 KB Output is correct
25 Correct 109 ms 19580 KB Output is correct
26 Correct 108 ms 19780 KB Output is correct
27 Correct 80 ms 19548 KB Output is correct
28 Correct 131 ms 20036 KB Output is correct
29 Correct 111 ms 19904 KB Output is correct
30 Correct 110 ms 19812 KB Output is correct
31 Correct 2148 ms 64660 KB Output is correct
32 Correct 2208 ms 68896 KB Output is correct
33 Correct 2076 ms 65488 KB Output is correct
34 Correct 1475 ms 68764 KB Output is correct
35 Correct 2258 ms 60604 KB Output is correct
36 Correct 2299 ms 101608 KB Output is correct
37 Correct 2709 ms 107516 KB Output is correct
38 Correct 24 ms 13836 KB Output is correct
39 Correct 112 ms 21480 KB Output is correct
40 Correct 109 ms 21140 KB Output is correct
41 Correct 123 ms 21316 KB Output is correct
42 Correct 8 ms 12240 KB Output is correct
43 Correct 86 ms 21152 KB Output is correct
44 Correct 152 ms 20852 KB Output is correct
45 Correct 84 ms 21124 KB Output is correct
46 Correct 77 ms 20752 KB Output is correct
47 Correct 115 ms 21208 KB Output is correct
48 Correct 115 ms 21060 KB Output is correct
49 Correct 101 ms 20952 KB Output is correct
50 Correct 2427 ms 103308 KB Output is correct
51 Correct 2181 ms 107316 KB Output is correct
52 Correct 2117 ms 104120 KB Output is correct
53 Correct 1697 ms 107448 KB Output is correct
54 Correct 2366 ms 99580 KB Output is correct
55 Correct 2590 ms 101524 KB Output is correct
56 Correct 2847 ms 107320 KB Output is correct
57 Correct 3376 ms 111608 KB Output is correct
58 Correct 3917 ms 122404 KB Output is correct
59 Correct 3343 ms 121044 KB Output is correct
60 Correct 1710 ms 98712 KB Output is correct
61 Execution timed out 6058 ms 144092 KB Time limit exceeded
62 Halted 0 ms 0 KB -