| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 857985 | 2023-10-07T08:41:11 Z | danikoynov | Newspapers (CEOI21_newspapers) | C++14 | 143 ms | 10844 KB |
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;
void speed()
{
ios_base::sync_with_stdio(NULL);
cin.tie(NULL);
cout.tie(NULL);
}
const int maxn = 1010;
int n, m;
void solve_chain()
{
if (n == 1)
{
cout << "YES" << endl;
cout << 1 << endl;
cout << 1 << endl;
return;
}
if (n == 2)
{
cout << "YES" << endl;
cout << 2 << endl;
cout << 1 << " " << 1 << endl;
return;
}
cout << "YES" << endl;
cout << (n - 2) * 2 << endl;
for (int i = 2; i < n; i ++)
cout << i << " ";
for (int i = n - 1; i > 1; i --)
cout << i << " ";
cout << endl;
}
vector < int > adj[maxn];
const int maxmask = (1 << 21);
int dp[maxmask], from[maxmask], last[maxmask];
int transition_mask(int mask, int ver)
{
int new_mask = 0;
if ((mask & (1 << (ver - 1))) > 0)
mask -= (1 << (ver - 1));
for (int v = 1; v <= n; v ++)
{
if ((mask & (1 << (v - 1))) == 0)
continue;
for (int u : adj[v])
new_mask |= (1 << (u - 1));
}
return new_mask;
}
int used[maxn];
bool cycle;
void dfs(int v, int p)
{
used[v] = 1;
for (int u : adj[v])
{
if (used[u] && u != p)
cycle = true;
if (!used[u])
dfs(u, v);
}
}
int depth[maxn], md[maxn];
void calc(int v, int p)
{
md[v] = depth[v];
for (int u : adj[v])
{
if (u == p)
continue;
depth[u] = depth[v] + 1;
calc(u, v);
md[v] = max(md[v], md[u]);
}
}
void check_bad()
{
for (int v = 1; v <= n; v ++)
{
for (int i = 1; i <= n; i ++)
depth[i] = md[i] = 0;
calc(v, - 1);
int cnt = 0;
for (int u : adj[v])
{
if (md[u] >= 3)
cnt ++;
}
if (cnt > 2)
{
cout << "NO" << endl;
exit(0);
}
}
}
void solve()
{
srand(time(NULL));
cin >> n >> m;
if (n == 1)
{
cout << "YES" << endl;
cout << 1 << endl;
cout << 1 << endl;
return;
}
for (int i = 1; i <= m; i ++)
{
int v, u;
cin >> v >> u;
//u = i + 1;
//v = rand() % (i) + 1;
//cout << v << " " << u << endl;
adj[v].push_back(u);
adj[u].push_back(v);
}
dfs(1, -1);
if (cycle)
{
cout << "NO" << endl;
return;
}
check_bad();
if (n > 20)
{
solve_chain();
return;
}
int base_mask = (1 << n) - 1;
for (int mask = 0; mask < (1 << n); mask ++)
dp[mask] = -1;
dp[base_mask] = 0;
queue < int > q;
q.push(base_mask);
while(!q.empty())
{
int mask = q.front();
q.pop();
for (int i = 0; i < n; i ++)
{
int next_mask = transition_mask(mask, i + 1);
if (dp[next_mask] == -1 )
{
dp[next_mask] = dp[mask] + 1;
from[next_mask] = i + 1;
last[next_mask] = mask;
q.push(next_mask);
}
}
}
if (dp[0] == -1)
{
cout << "NO" << endl;
return;
}
vector < int > ord;
int cur = 0;
while(cur != base_mask)
{
///cout << "step " << cur << " " << from[cur] << endl;
ord.push_back(from[cur]);
cur = last[cur];
}
reverse(ord.begin(), ord.end());
cout << "YES" << endl;
cout << ord.size() << endl;
for (int cur : ord)
cout << cur << " ";
cout << endl;
}
int main()
{
solve();
return 0;
}
/**
8 7
1 2
2 3
1 4
4 5
1 6
6 7
6 8
10 9
1 2
1 3
1 4
2 5
2 6
3 7
3 8
4 9
4 10
20
19
1 2
2 3
2 4
1 5
5 6
5 7
6 8
7 9
8 10
5 11
8 12
6 13
12 14
14 15
2 16
12 17
4 18
9 19
2 20
10 9
1 2
2 4
1 5
5 6
5 7
6 8
7 9
8 3
9 10
*/
| # | 결과 | 실행 시간 | 메모리 | Grader output |
|---|---|---|---|---|
| 1 | Correct | 0 ms | 348 KB | Output is correct |
| 2 | Correct | 1 ms | 4444 KB | Output is correct |
| 3 | Correct | 1 ms | 4444 KB | Output is correct |
| 4 | Correct | 1 ms | 4444 KB | Output is correct |
| 5 | Correct | 1 ms | 4444 KB | Output is correct |
| 6 | Correct | 1 ms | 4444 KB | Output is correct |
| 7 | Correct | 1 ms | 348 KB | Output is correct |
| 8 | Correct | 1 ms | 4444 KB | Output is correct |
| 9 | Correct | 0 ms | 348 KB | Output is correct |
| 10 | Correct | 1 ms | 4444 KB | Output is correct |
| 11 | Correct | 1 ms | 4444 KB | Output is correct |
| 12 | Correct | 1 ms | 4444 KB | Output is correct |
| 13 | Correct | 1 ms | 4440 KB | Output is correct |
| 14 | Correct | 1 ms | 4444 KB | Output is correct |
| 15 | Correct | 1 ms | 4444 KB | Output is correct |
| 16 | Correct | 1 ms | 4444 KB | Output is correct |
| 17 | Correct | 1 ms | 4444 KB | Output is correct |
| 18 | Correct | 1 ms | 4444 KB | Output is correct |
| 19 | Correct | 1 ms | 4696 KB | Output is correct |
| 20 | Correct | 1 ms | 4444 KB | Output is correct |
| 21 | Correct | 1 ms | 4444 KB | Output is correct |
| 22 | Correct | 1 ms | 4444 KB | Output is correct |
| 23 | Correct | 1 ms | 4444 KB | Output is correct |
| 24 | Correct | 1 ms | 4444 KB | Output is correct |
| 25 | Correct | 1 ms | 4444 KB | Output is correct |
| 26 | Correct | 1 ms | 4444 KB | Output is correct |
| 27 | Correct | 1 ms | 4444 KB | Output is correct |
| 28 | Correct | 1 ms | 4444 KB | Output is correct |
| 29 | Correct | 0 ms | 348 KB | Output is correct |
| 30 | Correct | 1 ms | 4444 KB | Output is correct |
| 31 | Correct | 1 ms | 4444 KB | Output is correct |
| 32 | Correct | 1 ms | 4444 KB | Output is correct |
| 33 | Correct | 1 ms | 4444 KB | Output is correct |
| 34 | Correct | 0 ms | 348 KB | Output is correct |
| 35 | Correct | 1 ms | 4700 KB | Output is correct |
| 36 | Correct | 1 ms | 4700 KB | Output is correct |
| 37 | Correct | 1 ms | 4444 KB | Output is correct |
| 38 | Correct | 1 ms | 4700 KB | Output is correct |
| 39 | Correct | 1 ms | 10840 KB | Output is correct |
| 40 | Correct | 2 ms | 10844 KB | Output is correct |
| 41 | Correct | 1 ms | 10584 KB | Output is correct |
| 42 | Correct | 2 ms | 10844 KB | Output is correct |
| 43 | Correct | 2 ms | 10588 KB | Output is correct |
| 44 | Correct | 2 ms | 10716 KB | Output is correct |
| 45 | Correct | 0 ms | 348 KB | Output is correct |
| 46 | Correct | 0 ms | 348 KB | Output is correct |
| 47 | Correct | 0 ms | 348 KB | Output is correct |
| 48 | Correct | 2 ms | 10588 KB | Output is correct |
| 49 | Correct | 0 ms | 348 KB | Output is correct |
| 50 | Correct | 0 ms | 348 KB | Output is correct |
| 51 | Correct | 2 ms | 10588 KB | Output is correct |
| 52 | Correct | 0 ms | 412 KB | Output is correct |
| 53 | Correct | 1 ms | 348 KB | Output is correct |
| 54 | Correct | 2 ms | 10588 KB | Output is correct |
| 55 | Correct | 0 ms | 348 KB | Output is correct |
| 56 | Correct | 0 ms | 348 KB | Output is correct |
| 57 | Correct | 0 ms | 348 KB | Output is correct |
| 58 | Correct | 0 ms | 348 KB | Output is correct |
| 59 | Correct | 0 ms | 348 KB | Output is correct |
| 60 | Correct | 0 ms | 348 KB | Output is correct |
| 61 | Correct | 0 ms | 348 KB | Output is correct |
| 62 | Correct | 0 ms | 348 KB | Output is correct |
| 63 | Correct | 0 ms | 348 KB | Output is correct |
| 64 | Correct | 0 ms | 348 KB | Output is correct |
| # | 결과 | 실행 시간 | 메모리 | Grader output |
|---|---|---|---|---|
| 1 | Correct | 0 ms | 344 KB | Output is correct |
| 2 | Correct | 1 ms | 4444 KB | Output is correct |
| 3 | Correct | 1 ms | 4444 KB | Output is correct |
| 4 | Correct | 1 ms | 4444 KB | Output is correct |
| 5 | Correct | 1 ms | 4444 KB | Output is correct |
| 6 | Correct | 1 ms | 4440 KB | Output is correct |
| 7 | Correct | 1 ms | 4444 KB | Output is correct |
| 8 | Correct | 1 ms | 4444 KB | Output is correct |
| 9 | Correct | 1 ms | 4444 KB | Output is correct |
| 10 | Correct | 1 ms | 4444 KB | Output is correct |
| 11 | Correct | 8 ms | 344 KB | Output is correct |
| 12 | Correct | 3 ms | 348 KB | Output is correct |
| 13 | Correct | 4 ms | 348 KB | Output is correct |
| 14 | Correct | 4 ms | 348 KB | Output is correct |
| 15 | Correct | 5 ms | 544 KB | Output is correct |
| 16 | Correct | 9 ms | 348 KB | Output is correct |
| 17 | Correct | 9 ms | 344 KB | Output is correct |
| 18 | Correct | 9 ms | 348 KB | Output is correct |
| 19 | Correct | 9 ms | 344 KB | Output is correct |
| 20 | Correct | 9 ms | 348 KB | Output is correct |
| # | 결과 | 실행 시간 | 메모리 | Grader output |
|---|---|---|---|---|
| 1 | Correct | 0 ms | 348 KB | Output is correct |
| 2 | Correct | 1 ms | 4444 KB | Output is correct |
| 3 | Correct | 1 ms | 4444 KB | Output is correct |
| 4 | Correct | 1 ms | 4444 KB | Output is correct |
| 5 | Correct | 1 ms | 4444 KB | Output is correct |
| 6 | Correct | 1 ms | 4444 KB | Output is correct |
| 7 | Correct | 1 ms | 348 KB | Output is correct |
| 8 | Correct | 1 ms | 4444 KB | Output is correct |
| 9 | Correct | 0 ms | 348 KB | Output is correct |
| 10 | Correct | 1 ms | 4444 KB | Output is correct |
| 11 | Correct | 1 ms | 4444 KB | Output is correct |
| 12 | Correct | 1 ms | 4444 KB | Output is correct |
| 13 | Correct | 1 ms | 4440 KB | Output is correct |
| 14 | Correct | 1 ms | 4444 KB | Output is correct |
| 15 | Correct | 1 ms | 4444 KB | Output is correct |
| 16 | Correct | 1 ms | 4444 KB | Output is correct |
| 17 | Correct | 1 ms | 4444 KB | Output is correct |
| 18 | Correct | 1 ms | 4444 KB | Output is correct |
| 19 | Correct | 1 ms | 4696 KB | Output is correct |
| 20 | Correct | 1 ms | 4444 KB | Output is correct |
| 21 | Correct | 1 ms | 4444 KB | Output is correct |
| 22 | Correct | 1 ms | 4444 KB | Output is correct |
| 23 | Correct | 1 ms | 4444 KB | Output is correct |
| 24 | Correct | 1 ms | 4444 KB | Output is correct |
| 25 | Correct | 1 ms | 4444 KB | Output is correct |
| 26 | Correct | 1 ms | 4444 KB | Output is correct |
| 27 | Correct | 1 ms | 4444 KB | Output is correct |
| 28 | Correct | 1 ms | 4444 KB | Output is correct |
| 29 | Correct | 0 ms | 348 KB | Output is correct |
| 30 | Correct | 1 ms | 4444 KB | Output is correct |
| 31 | Correct | 1 ms | 4444 KB | Output is correct |
| 32 | Correct | 1 ms | 4444 KB | Output is correct |
| 33 | Correct | 1 ms | 4444 KB | Output is correct |
| 34 | Correct | 0 ms | 348 KB | Output is correct |
| 35 | Correct | 1 ms | 4700 KB | Output is correct |
| 36 | Correct | 1 ms | 4700 KB | Output is correct |
| 37 | Correct | 1 ms | 4444 KB | Output is correct |
| 38 | Correct | 1 ms | 4700 KB | Output is correct |
| 39 | Correct | 1 ms | 10840 KB | Output is correct |
| 40 | Correct | 2 ms | 10844 KB | Output is correct |
| 41 | Correct | 1 ms | 10584 KB | Output is correct |
| 42 | Correct | 2 ms | 10844 KB | Output is correct |
| 43 | Correct | 2 ms | 10588 KB | Output is correct |
| 44 | Correct | 2 ms | 10716 KB | Output is correct |
| 45 | Correct | 0 ms | 348 KB | Output is correct |
| 46 | Correct | 0 ms | 348 KB | Output is correct |
| 47 | Correct | 0 ms | 348 KB | Output is correct |
| 48 | Correct | 2 ms | 10588 KB | Output is correct |
| 49 | Correct | 0 ms | 348 KB | Output is correct |
| 50 | Correct | 0 ms | 348 KB | Output is correct |
| 51 | Correct | 2 ms | 10588 KB | Output is correct |
| 52 | Correct | 0 ms | 412 KB | Output is correct |
| 53 | Correct | 1 ms | 348 KB | Output is correct |
| 54 | Correct | 2 ms | 10588 KB | Output is correct |
| 55 | Correct | 0 ms | 348 KB | Output is correct |
| 56 | Correct | 0 ms | 348 KB | Output is correct |
| 57 | Correct | 0 ms | 348 KB | Output is correct |
| 58 | Correct | 0 ms | 348 KB | Output is correct |
| 59 | Correct | 0 ms | 348 KB | Output is correct |
| 60 | Correct | 0 ms | 348 KB | Output is correct |
| 61 | Correct | 0 ms | 348 KB | Output is correct |
| 62 | Correct | 0 ms | 348 KB | Output is correct |
| 63 | Correct | 0 ms | 348 KB | Output is correct |
| 64 | Correct | 0 ms | 348 KB | Output is correct |
| 65 | Correct | 0 ms | 348 KB | Output is correct |
| 66 | Correct | 1 ms | 4444 KB | Output is correct |
| 67 | Correct | 1 ms | 4444 KB | Output is correct |
| 68 | Correct | 1 ms | 4444 KB | Output is correct |
| 69 | Correct | 1 ms | 4444 KB | Output is correct |
| 70 | Correct | 1 ms | 4444 KB | Output is correct |
| 71 | Correct | 0 ms | 600 KB | Output is correct |
| 72 | Correct | 1 ms | 4444 KB | Output is correct |
| 73 | Correct | 0 ms | 348 KB | Output is correct |
| 74 | Correct | 1 ms | 4444 KB | Output is correct |
| 75 | Correct | 1 ms | 4444 KB | Output is correct |
| 76 | Correct | 1 ms | 4440 KB | Output is correct |
| 77 | Correct | 1 ms | 4444 KB | Output is correct |
| 78 | Correct | 1 ms | 4444 KB | Output is correct |
| 79 | Correct | 1 ms | 348 KB | Output is correct |
| 80 | Correct | 1 ms | 348 KB | Output is correct |
| 81 | Correct | 1 ms | 344 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 | 344 KB | Output is correct |
| 86 | Correct | 1 ms | 348 KB | Output is correct |
| 87 | Correct | 1 ms | 472 KB | Output is correct |
| 88 | Correct | 1 ms | 348 KB | Output is correct |
| 89 | Partially correct | 8 ms | 600 KB | Failed to provide a successful strategy. |
| 90 | Partially correct | 7 ms | 344 KB | Failed to provide a successful strategy. |
| 91 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 92 | Partially correct | 8 ms | 604 KB | Failed to provide a successful strategy. |
| 93 | Partially correct | 8 ms | 344 KB | Failed to provide a successful strategy. |
| 94 | Partially correct | 6 ms | 344 KB | Failed to provide a successful strategy. |
| 95 | Partially correct | 9 ms | 344 KB | Failed to provide a successful strategy. |
| 96 | Partially correct | 9 ms | 348 KB | Failed to provide a successful strategy. |
| 97 | Partially correct | 5 ms | 348 KB | Failed to provide a successful strategy. |
| 98 | Partially correct | 8 ms | 472 KB | Failed to provide a successful strategy. |
| 99 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 100 | Partially correct | 7 ms | 344 KB | Failed to provide a successful strategy. |
| 101 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 102 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 103 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 104 | Partially correct | 5 ms | 348 KB | Failed to provide a successful strategy. |
| 105 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 106 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 107 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 108 | Partially correct | 9 ms | 348 KB | Failed to provide a successful strategy. |
| 109 | Partially correct | 7 ms | 500 KB | Failed to provide a successful strategy. |
| 110 | Partially correct | 7 ms | 356 KB | Failed to provide a successful strategy. |
| 111 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 112 | Partially correct | 6 ms | 344 KB | Failed to provide a successful strategy. |
| 113 | Partially correct | 9 ms | 348 KB | Failed to provide a successful strategy. |
| 114 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 115 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 116 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 117 | Partially correct | 9 ms | 348 KB | Failed to provide a successful strategy. |
| 118 | Partially correct | 10 ms | 348 KB | Failed to provide a successful strategy. |
| 119 | Partially correct | 7 ms | 348 KB | Failed to provide a successful strategy. |
| 120 | Partially correct | 8 ms | 348 KB | Failed to provide a successful strategy. |
| 121 | Partially correct | 8 ms | 552 KB | Failed to provide a successful strategy. |
| 122 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 123 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 124 | Partially correct | 8 ms | 348 KB | Failed to provide a successful strategy. |
| 125 | Partially correct | 5 ms | 348 KB | Failed to provide a successful strategy. |
| 126 | Partially correct | 6 ms | 348 KB | Failed to provide a successful strategy. |
| 127 | Partially correct | 5 ms | 348 KB | Failed to provide a successful strategy. |
| 128 | Partially correct | 9 ms | 348 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 | 344 KB | Output is correct |
| 132 | Correct | 1 ms | 348 KB | Output is correct |
| 133 | Correct | 1 ms | 348 KB | Output is correct |
| 134 | Correct | 28 ms | 2044 KB | Output is correct |
| 135 | Correct | 23 ms | 2140 KB | Output is correct |
| 136 | Correct | 62 ms | 5460 KB | Output is correct |
| 137 | Correct | 41 ms | 3412 KB | Output is correct |
| 138 | Correct | 73 ms | 5200 KB | Output is correct |
| 139 | Correct | 129 ms | 7944 KB | Output is correct |
| 140 | Correct | 18 ms | 1616 KB | Output is correct |
| 141 | Correct | 6 ms | 860 KB | Output is correct |
| 142 | Correct | 114 ms | 7496 KB | Output is correct |
| 143 | Correct | 143 ms | 8272 KB | Output is correct |
| 144 | Correct | 9 ms | 348 KB | Output is correct |
| 145 | Correct | 9 ms | 348 KB | Output is correct |