oj.uz

Submission #532580

# Submission time Handle Problem Language Result Execution time Memory
532580 2022-03-03T08:50:47 Z qwerasdfzxcl Newspapers (CEOI21_newspapers) C++14
12 / 100
 27 ms 16480 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
constexpr int INF = 1e9;
vector<int> adj[1010];
int dist[2002000], n;
pair<int, int> par[2002000];

int _relax(int msk){
    int ret = 0;
    for (int i=1;i<=n;i++) if (msk&(1<<(i-1))){
        for (auto &v:adj[i]) ret |= (1<<(v-1));
    }
    return ret;
}

int dep[1010], pos[1010];
void dfs(int s, int pa = -1){
    for (auto &v:adj[s]) if (v!=pa){
        dep[v] = dep[s] + 1;
        if (pa==-1) pos[v] = v;
        else pos[v] = pos[s];
        dfs(v, s);
    }
}

int main(){
    int m;
    scanf("%d %d", &n, &m);
    if (m>n-1) {printf("NO\n"); return 0;}

    for (int i=0;i<m;i++){
        int x, y;
        scanf("%d %d", &x, &y);
        adj[x].push_back(y);
        adj[y].push_back(x);
    }

    for (int i=1;i<=n;i++){
        dep[i] = 0;
        dfs(i);
        set<int> S;
        for (int j=1;j<=n;j++) if (dep[j]==3) S.insert(pos[j]);
        if (S.size()>=3) {printf("NO\n"); return 0;}
    }

    //printf("YES\n1\n1\n");
    //return 0;

    int mx = (1<<n) - 1;
    fill(dist, dist+mx+1, INF);
    dist[mx] = 0;
    queue<int> q;
    q.push(mx);

    while(!q.empty()){
        int s = q.front(); q.pop();
        for (int i=0;i<n;i++){
            int v = s & (mx ^ (1<<i));
            v = _relax(v);
            if (dist[v]!=INF) continue;
            dist[v] = dist[s] + 1;
            par[v] = {s, i+1};
            q.push(v);
        }
    }

    if (dist[0]==INF) printf("NO\n");
    else{
        printf("YES\n");
        vector<int> ans;
        for (int cur = 0;cur!=mx;cur=par[cur].first) ans.push_back(par[cur].second);
        reverse(ans.begin(), ans.end());
        printf("%d\n", (int)ans.size());
        for (auto &x: ans) printf("%d ", x);
    }
    return 0;
}

Compilation message

newspapers.cpp: In function 'int main()':
newspapers.cpp:30:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
newspapers.cpp:35:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |         scanf("%d %d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 0 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 0 ms 332 KB Output is correct
21 Correct 0 ms 332 KB Output is correct
22 Correct 0 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 0 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 1 ms 460 KB Output is correct
33 Correct 1 ms 460 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 1 ms 588 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 1 ms 588 KB Output is correct
38 Correct 1 ms 588 KB Output is correct
39 Correct 1 ms 844 KB Output is correct
40 Correct 1 ms 844 KB Output is correct
41 Correct 1 ms 716 KB Output is correct
42 Correct 1 ms 844 KB Output is correct
43 Correct 1 ms 1100 KB Output is correct
44 Correct 1 ms 972 KB Output is correct
45 Correct 0 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 0 ms 332 KB Output is correct
48 Correct 1 ms 1868 KB Output is correct
49 Correct 0 ms 332 KB Output is correct
50 Correct 0 ms 332 KB Output is correct
51 Correct 2 ms 2892 KB Output is correct
52 Correct 0 ms 332 KB Output is correct
53 Correct 0 ms 328 KB Output is correct
54 Correct 2 ms 2636 KB Output is correct
55 Correct 0 ms 332 KB Output is correct
56 Correct 0 ms 332 KB Output is correct
57 Correct 0 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 0 ms 204 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 0 ms 204 KB Output is correct
63 Correct 0 ms 332 KB Output is correct
64 Correct 1 ms 332 KB Output is correct

Subtask #2
0.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Runtime error 14 ms 1228 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #3
0.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 0 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 0 ms 332 KB Output is correct
21 Correct 0 ms 332 KB Output is correct
22 Correct 0 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 0 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 1 ms 460 KB Output is correct
33 Correct 1 ms 460 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 1 ms 588 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 1 ms 588 KB Output is correct
38 Correct 1 ms 588 KB Output is correct
39 Correct 1 ms 844 KB Output is correct
40 Correct 1 ms 844 KB Output is correct
41 Correct 1 ms 716 KB Output is correct
42 Correct 1 ms 844 KB Output is correct
43 Correct 1 ms 1100 KB Output is correct
44 Correct 1 ms 972 KB Output is correct
45 Correct 0 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 0 ms 332 KB Output is correct
48 Correct 1 ms 1868 KB Output is correct
49 Correct 0 ms 332 KB Output is correct
50 Correct 0 ms 332 KB Output is correct
51 Correct 2 ms 2892 KB Output is correct
52 Correct 0 ms 332 KB Output is correct
53 Correct 0 ms 328 KB Output is correct
54 Correct 2 ms 2636 KB Output is correct
55 Correct 0 ms 332 KB Output is correct
56 Correct 0 ms 332 KB Output is correct
57 Correct 0 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 0 ms 204 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 0 ms 204 KB Output is correct
63 Correct 0 ms 332 KB Output is correct
64 Correct 1 ms 332 KB Output is correct
65 Correct 0 ms 332 KB Output is correct
66 Correct 0 ms 332 KB Output is correct
67 Correct 0 ms 332 KB Output is correct
68 Correct 0 ms 332 KB Output is correct
69 Correct 1 ms 332 KB Output is correct
70 Correct 0 ms 332 KB Output is correct
71 Correct 0 ms 332 KB Output is correct
72 Correct 0 ms 332 KB Output is correct
73 Correct 0 ms 332 KB Output is correct
74 Correct 1 ms 332 KB Output is correct
75 Correct 0 ms 332 KB Output is correct
76 Correct 0 ms 332 KB Output is correct
77 Correct 0 ms 332 KB Output is correct
78 Correct 0 ms 332 KB Output is correct
79 Correct 1 ms 332 KB Output is correct
80 Correct 1 ms 328 KB Output is correct
81 Correct 1 ms 332 KB Output is correct
82 Correct 1 ms 332 KB Output is correct
83 Correct 1 ms 332 KB Output is correct
84 Correct 1 ms 332 KB Output is correct
85 Correct 1 ms 332 KB Output is correct
86 Correct 1 ms 332 KB Output is correct
87 Correct 1 ms 332 KB Output is correct
88 Correct 1 ms 332 KB Output is correct
89 Runtime error 27 ms 16480 KB Execution killed with signal 11
90 Halted 0 ms 0 KB -