Submission #697593

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
697593	2023-02-10T13:26:21 Z	piOOE	Newspapers (CEOI21_newspapers)	C++17	50 / 100	70 ms	8244 KB

newspapers

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, m;
    cin >> n >> m;

    vector<vector<int>> adj(n);

    vector<int> fa(n);
    iota(fa.begin(), fa.end(), 0);

    auto leader = [&](int x) {
        while (x != fa[x]) x = fa[x] = fa[fa[x]];
        return x;
    };

    auto unite = [&](int x, int y) -> bool {
        x = leader(x), y = leader(y);
        return (x != y) && (fa[y] = x, true);
    };

    bool yay = true;

    for (int i = 0; i < m; ++i) {
        int x, y;
        cin >> x >> y;
        x -= 1, y -= 1;

        adj[x].push_back(y);
        adj[y].push_back(x);

        yay &= unite(x, y);
    }

    if (!yay) {
        cout << "NO\n";
        return 0;
    }

    auto bfs = [&](int source) {
        vector<int> dist(n, -1);
        dist[source] = 0;

        queue<int> q;
        q.push(source);

        while (!q.empty()) {
            int v = q.front();
            q.pop();

            for (int to : adj[v]) {
                if (dist[to] == -1) {
                    dist[to] = dist[v] + 1;
                    q.push(to);
                }
            }
        }

        return dist;
    };

    auto tmp = bfs(0);

    int d1 = max_element(tmp.begin(), tmp.end()) - tmp.begin();

    auto dist1 = bfs(d1);

    int d2 = max_element(dist1.begin(), dist1.end()) - dist1.begin();

    auto dist2 = bfs(d2);

    int diam = dist1[d2];

    for (int i = 0; i < n && yay; ++i) {
        int len = (dist1[i] + dist2[i] - diam) / 2;

        if (len >= 3) {
            yay = false;
        }
    }

    if (yay) {
        cout << "YES\n";

        cout << "1\n1\n";
    } else {
        cout << "NO\n";
    }

    return 0;
}

Subtask #1
6.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
3	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
4	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
5	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
6	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
7	Correct	0 ms	212 KB	Output is correct
8	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
9	Correct	0 ms	212 KB	Output is correct
10	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
11	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
12	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
13	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
14	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
15	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
16	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
17	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
18	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
19	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
20	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
21	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
22	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
23	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
24	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
25	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
26	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
27	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
28	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
29	Correct	0 ms	212 KB	Output is correct
30	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
31	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
32	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
33	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
34	Correct	0 ms	212 KB	Output is correct
35	Partially correct	0 ms	320 KB	Failed to provide a successful strategy.
36	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
37	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
38	Partially correct	1 ms	320 KB	Failed to provide a successful strategy.
39	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
40	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
41	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
42	Partially correct	1 ms	300 KB	Failed to provide a successful strategy.
43	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
44	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
45	Correct	0 ms	312 KB	Output is correct
46	Correct	1 ms	212 KB	Output is correct
47	Correct	1 ms	212 KB	Output is correct
48	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
49	Correct	1 ms	212 KB	Output is correct
50	Correct	0 ms	212 KB	Output is correct
51	Partially correct	0 ms	316 KB	Failed to provide a successful strategy.
52	Correct	1 ms	212 KB	Output is correct
53	Correct	1 ms	212 KB	Output is correct
54	Partially correct	1 ms	320 KB	Failed to provide a successful strategy.
55	Correct	0 ms	212 KB	Output is correct
56	Correct	1 ms	316 KB	Output is correct
57	Correct	1 ms	212 KB	Output is correct
58	Correct	0 ms	212 KB	Output is correct
59	Correct	1 ms	212 KB	Output is correct
60	Correct	0 ms	212 KB	Output is correct
61	Correct	1 ms	212 KB	Output is correct
62	Correct	0 ms	212 KB	Output is correct
63	Correct	1 ms	212 KB	Output is correct
64	Correct	1 ms	212 KB	Output is correct

Subtask #2
4.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
3	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
4	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
5	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
6	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
7	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
8	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
9	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
10	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
11	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
12	Partially correct	0 ms	340 KB	Failed to provide a successful strategy.
13	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
14	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
15	Partially correct	0 ms	340 KB	Failed to provide a successful strategy.
16	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
17	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
18	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
19	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
20	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.

Subtask #3
40.0 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
3	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
4	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
5	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
6	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
7	Correct	0 ms	212 KB	Output is correct
8	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
9	Correct	0 ms	212 KB	Output is correct
10	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
11	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
12	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
13	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
14	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
15	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
16	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
17	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
18	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
19	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
20	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
21	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
22	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
23	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
24	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
25	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
26	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
27	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
28	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
29	Correct	0 ms	212 KB	Output is correct
30	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
31	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
32	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
33	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
34	Correct	0 ms	212 KB	Output is correct
35	Partially correct	0 ms	320 KB	Failed to provide a successful strategy.
36	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
37	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
38	Partially correct	1 ms	320 KB	Failed to provide a successful strategy.
39	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
40	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
41	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
42	Partially correct	1 ms	300 KB	Failed to provide a successful strategy.
43	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
44	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
45	Correct	0 ms	312 KB	Output is correct
46	Correct	1 ms	212 KB	Output is correct
47	Correct	1 ms	212 KB	Output is correct
48	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
49	Correct	1 ms	212 KB	Output is correct
50	Correct	0 ms	212 KB	Output is correct
51	Partially correct	0 ms	316 KB	Failed to provide a successful strategy.
52	Correct	1 ms	212 KB	Output is correct
53	Correct	1 ms	212 KB	Output is correct
54	Partially correct	1 ms	320 KB	Failed to provide a successful strategy.
55	Correct	0 ms	212 KB	Output is correct
56	Correct	1 ms	316 KB	Output is correct
57	Correct	1 ms	212 KB	Output is correct
58	Correct	0 ms	212 KB	Output is correct
59	Correct	1 ms	212 KB	Output is correct
60	Correct	0 ms	212 KB	Output is correct
61	Correct	1 ms	212 KB	Output is correct
62	Correct	0 ms	212 KB	Output is correct
63	Correct	1 ms	212 KB	Output is correct
64	Correct	1 ms	212 KB	Output is correct
65	Correct	0 ms	212 KB	Output is correct
66	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
67	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
68	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
69	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
70	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
71	Correct	1 ms	324 KB	Output is correct
72	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
73	Correct	0 ms	212 KB	Output is correct
74	Partially correct	0 ms	340 KB	Failed to provide a successful strategy.
75	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
76	Partially correct	0 ms	212 KB	Failed to provide a successful strategy.
77	Partially correct	1 ms	324 KB	Failed to provide a successful strategy.
78	Partially correct	1 ms	212 KB	Failed to provide a successful strategy.
79	Correct	1 ms	324 KB	Output is correct
80	Correct	1 ms	340 KB	Output is correct
81	Correct	1 ms	340 KB	Output is correct
82	Correct	1 ms	340 KB	Output is correct
83	Correct	1 ms	340 KB	Output is correct
84	Correct	1 ms	340 KB	Output is correct
85	Correct	1 ms	360 KB	Output is correct
86	Correct	1 ms	340 KB	Output is correct
87	Correct	1 ms	340 KB	Output is correct
88	Correct	1 ms	340 KB	Output is correct
89	Partially correct	1 ms	324 KB	Failed to provide a successful strategy.
90	Partially correct	1 ms	324 KB	Failed to provide a successful strategy.
91	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
92	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
93	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
94	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
95	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
96	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
97	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
98	Partially correct	1 ms	396 KB	Failed to provide a successful strategy.
99	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
100	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
101	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
102	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
103	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
104	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
105	Partially correct	1 ms	312 KB	Failed to provide a successful strategy.
106	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
107	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
108	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
109	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
110	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
111	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
112	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
113	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
114	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
115	Partially correct	1 ms	320 KB	Failed to provide a successful strategy.
116	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
117	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
118	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
119	Partially correct	1 ms	324 KB	Failed to provide a successful strategy.
120	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
121	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
122	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
123	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
124	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
125	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
126	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
127	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
128	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
129	Correct	1 ms	340 KB	Output is correct
130	Correct	1 ms	340 KB	Output is correct
131	Correct	1 ms	320 KB	Output is correct
132	Correct	1 ms	340 KB	Output is correct
133	Correct	1 ms	324 KB	Output is correct
134	Correct	15 ms	2004 KB	Output is correct
135	Correct	11 ms	1876 KB	Output is correct
136	Correct	33 ms	5456 KB	Output is correct
137	Correct	20 ms	3268 KB	Output is correct
138	Correct	38 ms	4584 KB	Output is correct
139	Correct	65 ms	7816 KB	Output is correct
140	Correct	9 ms	1484 KB	Output is correct
141	Correct	4 ms	700 KB	Output is correct
142	Correct	70 ms	7520 KB	Output is correct
143	Correct	65 ms	8244 KB	Output is correct
144	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.
145	Partially correct	1 ms	340 KB	Failed to provide a successful strategy.

Submission #697593

Compilation message

Subtask #1 6.0 / 12.0

Subtask #2 4.0 / 8.0

Subtask #3 40.0 / 80.0

Subtask #1
6.0 / 12.0

Subtask #2
4.0 / 8.0

Subtask #3
40.0 / 80.0