oj.uz

Submission #957230

# Submission time Handle Problem Language Result Execution time Memory
957230 2024-04-03T08:45:33 Z LucaIlie Newspapers (CEOI21_newspapers) C++17
50 / 100
 139 ms 8240 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 1e3;
int n;
int depth[MAX_N + 1], maxDepth[MAX_N + 1], sizee[MAX_N + 1];
vector<int> adj[MAX_N + 1];

int findCentroid( int u, int p ) {
    int c = 0, mx = 0;
    sizee[u] = 1;
    for ( int v: adj[u] ) {
        if ( v == p )
            continue;
        int x = findCentroid( v, u );
        if ( x != 0 )
            c = x;
        sizee[u] += sizee[v];
        mx = max( mx, sizee[v] );
    }
    mx = max( mx, n - sizee[u] );
    if ( mx <= n / 2 )
        c = u;
    return c;
}

bool ok = true;
void dfs( int u, int p ) {
    depth[u] = depth[p] + 1;
    maxDepth[u] = depth[u];
    int c = 0;
    for ( int v: adj[u] ) {
        if ( v == p )
            continue;
        dfs( v, u );
        maxDepth[u] = max( maxDepth[u], maxDepth[v] );
        if ( maxDepth[v] - depth[u] > 2 )
            c++;
    }
    if ( (depth[u] >= 3 && c >= 2) || (c >= 3) )
        ok = false;
}

int main() {
    int m;

    cin >> n >> m;
    for ( int i = 0; i < m; i++ ) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back( v );
        adj[v].push_back( u );
    }

    if ( m != n - 1 ) {
        cout << "NO\n";
        return 0;
    }
    if ( n <= 3 ) {
        cout << "YES\n";
        cout << "2\n 1 1\n";
        return 0;
    }


    int c = findCentroid( 1, 0 );
    dfs( c, 0 );

    if ( !ok )
        cout << "NO\n";
    else {
        cout << "YES\n";
        cout << "2\n 1 1\n";
    }
        
    return 0;
}

Subtask #1
6.0 / 12.0

# Verdict Execution time Memory Grader output
1 Partially correct 0 ms 348 KB Provide a successful but not optimal strategy.
2 Correct 1 ms 344 KB Output is correct
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Correct 0 ms 348 KB Output is correct
6 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
7 Correct 0 ms 348 KB Output is correct
8 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
9 Correct 0 ms 348 KB Output is correct
10 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
11 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
13 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
14 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
15 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
16 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
17 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
19 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
20 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
21 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
22 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
23 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
24 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
25 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
26 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
27 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
28 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
29 Correct 0 ms 348 KB Output is correct
30 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
31 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
32 Partially correct 1 ms 604 KB Failed to provide a successful strategy.
33 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
34 Correct 0 ms 348 KB Output is correct
35 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
36 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
37 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
38 Partially correct 0 ms 460 KB Failed to provide a successful strategy.
39 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
40 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
41 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
42 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
43 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
44 Partially correct 0 ms 460 KB Failed to provide a successful strategy.
45 Correct 0 ms 348 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 0 ms 464 KB Output is correct
48 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 600 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 600 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 0 ms 348 KB Output is correct

Subtask #2
4.0 / 8.0

# Verdict Execution time Memory Grader output
1 Partially correct 0 ms 348 KB Provide a successful but not optimal strategy.
2 Correct 0 ms 464 KB Output is correct
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
6 Partially correct 0 ms 460 KB Failed to provide a successful strategy.
7 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
8 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
9 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
10 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
11 Partially correct 1 ms 464 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
13 Partially correct 1 ms 468 KB Failed to provide a successful strategy.
14 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
15 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
16 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
17 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 1 ms 360 KB Failed to provide a successful strategy.
19 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
20 Partially correct 1 ms 348 KB Failed to provide a successful strategy.

Subtask #3
40.0 / 80.0

# Verdict Execution time Memory Grader output
1 Partially correct 0 ms 348 KB Provide a successful but not optimal strategy.
2 Correct 1 ms 344 KB Output is correct
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Correct 0 ms 348 KB Output is correct
6 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
7 Correct 0 ms 348 KB Output is correct
8 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
9 Correct 0 ms 348 KB Output is correct
10 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
11 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
13 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
14 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
15 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
16 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
17 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
19 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
20 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
21 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
22 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
23 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
24 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
25 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
26 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
27 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
28 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
29 Correct 0 ms 348 KB Output is correct
30 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
31 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
32 Partially correct 1 ms 604 KB Failed to provide a successful strategy.
33 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
34 Correct 0 ms 348 KB Output is correct
35 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
36 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
37 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
38 Partially correct 0 ms 460 KB Failed to provide a successful strategy.
39 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
40 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
41 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
42 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
43 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
44 Partially correct 0 ms 460 KB Failed to provide a successful strategy.
45 Correct 0 ms 348 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 0 ms 464 KB Output is correct
48 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 600 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 600 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Partially correct 0 ms 348 KB Provide a successful but not optimal strategy.
66 Correct 0 ms 348 KB Output is correct
67 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
68 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
69 Correct 0 ms 416 KB Output is correct
70 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
71 Correct 1 ms 348 KB Output is correct
72 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
73 Correct 0 ms 348 KB Output is correct
74 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
75 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
76 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
77 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
78 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
79 Correct 1 ms 348 KB Output is correct
80 Correct 1 ms 348 KB Output is correct
81 Correct 1 ms 348 KB Output is correct
82 Correct 1 ms 348 KB Output is correct
83 Correct 1 ms 348 KB Output is correct
84 Correct 1 ms 348 KB Output is correct
85 Correct 1 ms 348 KB Output is correct
86 Correct 1 ms 348 KB Output is correct
87 Correct 1 ms 348 KB Output is correct
88 Correct 1 ms 348 KB Output is correct
89 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
90 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
91 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
92 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
93 Partially correct 1 ms 360 KB Failed to provide a successful strategy.
94 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
95 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
96 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
97 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
98 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
99 Partially correct 1 ms 492 KB Failed to provide a successful strategy.
100 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
101 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
102 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
103 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
104 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
105 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
106 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
107 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
108 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
109 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
110 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
111 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
112 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
113 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
114 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
115 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
116 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
117 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
118 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
119 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
120 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
121 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
122 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
123 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
124 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
125 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
126 Partially correct 1 ms 600 KB Failed to provide a successful strategy.
127 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
128 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
129 Correct 1 ms 348 KB Output is correct
130 Correct 1 ms 348 KB Output is correct
131 Correct 1 ms 348 KB Output is correct
132 Correct 1 ms 348 KB Output is correct
133 Correct 1 ms 348 KB Output is correct
134 Correct 26 ms 1884 KB Output is correct
135 Correct 22 ms 1884 KB Output is correct
136 Correct 60 ms 5588 KB Output is correct
137 Correct 39 ms 3456 KB Output is correct
138 Correct 68 ms 4692 KB Output is correct
139 Correct 124 ms 7792 KB Output is correct
140 Correct 17 ms 1372 KB Output is correct
141 Correct 6 ms 856 KB Output is correct
142 Correct 113 ms 7508 KB Output is correct
143 Correct 139 ms 8240 KB Output is correct
144 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
145 Partially correct 1 ms 348 KB Failed to provide a successful strategy.