#include <bits/stdc++.h>
using namespace std;
const int MN = 2e5 + 5;
vector<int> adj[MN];
bool vis[MN];
int sz[MN], ans[MN], bit[MN], cent; vector<array<int,2>> toadd;
void update (int i, int v) {
for (i=MN-i;i<MN;i+=i&-i)
bit[i] = max(bit[i],v);
}
int query (int i) {
int ret = -1e9;
for (i=MN-i;i;i^=i&-i)
ret = max(ret,bit[i]);
return ret;
}
void clear (int i) {
for (i=MN-i;i;i^=i&-i)
bit[i] = 0;
}
void getsz (int cur, int p = -1) {
sz[cur] = 1;
for (int i : adj[cur]) if (!vis[i] && i != p) {
getsz(i,cur);
sz[cur] += sz[i];
}
}
int getcent (int cur, int tot, int p = -1) {
for (int i : adj[cur]) if (!vis[i] && i != p && sz[i] > tot/2)
return getcent(i,tot,cur);
return cur;
}
void dfs (int cur, int ch, int depth = 1, int p = -1) {
toadd.push_back({sz[cur],depth});
ans[sz[cur]*2] = max(ans[sz[cur]*2],depth + query(sz[cur]) + 1);
if (sz[cent] - sz[ch] >= sz[cur]) ans[sz[cur]*2] = max(ans[sz[cur]*2],depth + 1);
for (int i : adj[cur]) if (i != p && !vis[i]) {
dfs(i,ch,depth+1,cur);
}
}
void decomp (int cur) {
getsz(cur);
cent = getcent(cur,sz[cur]);
vis[cent] = 1; getsz(cent);
for (int i : adj[cent]) if (!vis[i]) {
dfs(i,i);
for (auto &[s,d] : toadd) update(s,d);
toadd.clear();
}
for (int i = 1; i <= sz[cent]; i++) clear(i);
reverse(adj[cent].begin(),adj[cent].end());
for (int i : adj[cent]) if (!vis[i]) {
dfs(i,i);
for (auto &[s,d] : toadd) update(s,d);
toadd.clear();
}
for (int i = 1; i <= sz[cent]; i++) clear(i);
for (int i : adj[cent]) if (!vis[i]) decomp(i);
}
int main () {
int n; scanf ("%d",&n);
for (int i = 1; i < n; i++) {
int a,b; scanf ("%d %d",&a,&b);
adj[a].push_back(b); adj[b].push_back(a);
}
decomp(1);
for (int i = n - (n%2); i > 2; i -= 2) ans[i-2] = max(ans[i-2],ans[i]);
for (int i = 1; i <= n; i++) printf ("%d\n",i&1?1:max(1,ans[i]));
return 0;
}
Compilation message
meetings2.cpp: In function 'int main()':
meetings2.cpp:61:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
61 | int n; scanf ("%d",&n);
| ~~~~~~^~~~~~~~~
meetings2.cpp:63:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
63 | int a,b; scanf ("%d %d",&a,&b);
| ~~~~~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5020 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
4964 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4944 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4940 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5020 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
4964 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4944 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 22 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 23 |
Correct |
8 ms |
5196 KB |
Output is correct |
| 24 |
Correct |
9 ms |
5240 KB |
Output is correct |
| 25 |
Correct |
10 ms |
5240 KB |
Output is correct |
| 26 |
Correct |
9 ms |
5196 KB |
Output is correct |
| 27 |
Correct |
8 ms |
5196 KB |
Output is correct |
| 28 |
Correct |
9 ms |
5200 KB |
Output is correct |
| 29 |
Correct |
8 ms |
5196 KB |
Output is correct |
| 30 |
Correct |
10 ms |
5196 KB |
Output is correct |
| 31 |
Correct |
9 ms |
5176 KB |
Output is correct |
| 32 |
Correct |
11 ms |
5344 KB |
Output is correct |
| 33 |
Correct |
13 ms |
5324 KB |
Output is correct |
| 34 |
Correct |
6 ms |
5196 KB |
Output is correct |
| 35 |
Correct |
6 ms |
5228 KB |
Output is correct |
| 36 |
Correct |
8 ms |
5268 KB |
Output is correct |
| 37 |
Correct |
7 ms |
5196 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5324 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5020 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
4964 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4944 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 22 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 23 |
Correct |
8 ms |
5196 KB |
Output is correct |
| 24 |
Correct |
9 ms |
5240 KB |
Output is correct |
| 25 |
Correct |
10 ms |
5240 KB |
Output is correct |
| 26 |
Correct |
9 ms |
5196 KB |
Output is correct |
| 27 |
Correct |
8 ms |
5196 KB |
Output is correct |
| 28 |
Correct |
9 ms |
5200 KB |
Output is correct |
| 29 |
Correct |
8 ms |
5196 KB |
Output is correct |
| 30 |
Correct |
10 ms |
5196 KB |
Output is correct |
| 31 |
Correct |
9 ms |
5176 KB |
Output is correct |
| 32 |
Correct |
11 ms |
5344 KB |
Output is correct |
| 33 |
Correct |
13 ms |
5324 KB |
Output is correct |
| 34 |
Correct |
6 ms |
5196 KB |
Output is correct |
| 35 |
Correct |
6 ms |
5228 KB |
Output is correct |
| 36 |
Correct |
8 ms |
5268 KB |
Output is correct |
| 37 |
Correct |
7 ms |
5196 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5324 KB |
Output is correct |
| 39 |
Correct |
709 ms |
15180 KB |
Output is correct |
| 40 |
Correct |
728 ms |
14768 KB |
Output is correct |
| 41 |
Correct |
691 ms |
15080 KB |
Output is correct |
| 42 |
Correct |
620 ms |
15432 KB |
Output is correct |
| 43 |
Correct |
668 ms |
15156 KB |
Output is correct |
| 44 |
Correct |
641 ms |
15176 KB |
Output is correct |
| 45 |
Correct |
1079 ms |
20164 KB |
Output is correct |
| 46 |
Correct |
870 ms |
24324 KB |
Output is correct |
| 47 |
Correct |
219 ms |
14696 KB |
Output is correct |
| 48 |
Correct |
200 ms |
14920 KB |
Output is correct |
| 49 |
Correct |
581 ms |
15884 KB |
Output is correct |
| 50 |
Correct |
216 ms |
15904 KB |
Output is correct |
| 51 |
Correct |
525 ms |
23264 KB |
Output is correct |
