#include "meetings.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn=2e3+5;
#define pii pair<int,int>
#define fi first
#define se second
vector<int> edge[maxn];
bool check[maxn];
int child[maxn],sz;
bool used[maxn];
void add(int u,int v){
edge[u].push_back(v);
edge[v].push_back(u);
}
void del(int u,int v){
for(int t=0;t<2;t++){
for(int i=0;i<(int)edge[u].size();i++){
if(edge[u][i]==v){edge[u].erase(edge[u].begin()+i);break;}
}
swap(u,v);
}
}
void dfs_sz(int u,int p){
child[u]=1;
for(int v:edge[u]){
if(v==p || used[v]) continue;
dfs_sz(v,u);child[u]+=child[v];
}
}
int findcen(int u,int p){
for(int v:edge[u]){
if(v==p || used[v]) continue;
if(child[v]>sz/2) return findcen(v,u);
}
return u;
}
void decompose(int u,int a){
dfs_sz(u,0);sz=child[u];
int x=findcen(u,0);used[x]=true;
dfs_sz(x,0);
vector<pii> p;
for(int v:edge[x]){
if(used[v]) continue;
p.push_back({child[v],v});
}
sort(p.begin(),p.end(),greater<pii>());
for(int i=0;i<(int)p.size();i+=2){
if(i+1<(int)p.size()){
int v1=p[i].se,v2=p[i+1].se;
int cc=Query(v1,v2,a);
if(cc==x) continue;
if(!check[cc] || cc==a){
int c2=Query(x,v1,cc);
if(c2==cc){del(x,v1);add(x,cc);add(cc,v1);}
else{del(x,v2);add(x,cc);add(cc,v2);}
if(a!=cc) add(a,cc);
check[a]=check[cc]=1;
}
else if(cc==v1) decompose(v1,a);
else if(cc==v2) decompose(v2,a);
return;
}
else{
int v=p[i].se;
int cc=Query(x,v,a);
if(cc==x) continue;
if(!check[cc] || cc==a){
del(x,v);add(x,cc);add(cc,v);
if(a!=cc) add(a,cc);
check[a]=check[cc]=1;
}
else decompose(v,a);
return;
}
}
add(x,a);check[a]=true;
}
void Solve(int N) {
check[0]=check[1]=1;add(0,1);
while(true){
int a=0;
while(a<N && check[a]) a++;
if(a==N) break;
for(int i=0;i<N;i++) used[i]=false;
decompose(0,a);
}
for(int i=0;i<N;i++){
for(int v:edge[i]){
if(i<v) Bridge(i,v);
}
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
0 ms |
336 KB |
Output is correct |
5 |
Correct |
0 ms |
336 KB |
Output is correct |
6 |
Correct |
0 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Correct |
1 ms |
396 KB |
Output is correct |
9 |
Correct |
0 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
0 ms |
336 KB |
Output is correct |
13 |
Correct |
0 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
0 ms |
336 KB |
Output is correct |
5 |
Correct |
0 ms |
336 KB |
Output is correct |
6 |
Correct |
0 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Correct |
1 ms |
396 KB |
Output is correct |
9 |
Correct |
0 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
0 ms |
336 KB |
Output is correct |
13 |
Correct |
0 ms |
336 KB |
Output is correct |
14 |
Correct |
0 ms |
336 KB |
Output is correct |
15 |
Correct |
0 ms |
336 KB |
Output is correct |
16 |
Correct |
1 ms |
408 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
0 ms |
336 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
0 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
1 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
0 ms |
336 KB |
Output is correct |
5 |
Correct |
0 ms |
336 KB |
Output is correct |
6 |
Correct |
0 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Correct |
1 ms |
396 KB |
Output is correct |
9 |
Correct |
0 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
0 ms |
384 KB |
Output is correct |
12 |
Correct |
0 ms |
336 KB |
Output is correct |
13 |
Correct |
0 ms |
336 KB |
Output is correct |
14 |
Correct |
0 ms |
336 KB |
Output is correct |
15 |
Correct |
0 ms |
336 KB |
Output is correct |
16 |
Correct |
1 ms |
408 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
0 ms |
336 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
0 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
1 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
27 |
Correct |
4 ms |
336 KB |
Output is correct |
28 |
Correct |
5 ms |
432 KB |
Output is correct |
29 |
Correct |
4 ms |
336 KB |
Output is correct |
30 |
Correct |
4 ms |
336 KB |
Output is correct |
31 |
Correct |
4 ms |
336 KB |
Output is correct |
32 |
Correct |
4 ms |
336 KB |
Output is correct |
33 |
Correct |
7 ms |
440 KB |
Output is correct |
34 |
Correct |
9 ms |
444 KB |
Output is correct |
35 |
Correct |
6 ms |
444 KB |
Output is correct |
36 |
Correct |
4 ms |
436 KB |
Output is correct |
37 |
Correct |
7 ms |
464 KB |
Output is correct |
38 |
Correct |
7 ms |
464 KB |
Output is correct |
39 |
Correct |
7 ms |
464 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
255 ms |
692 KB |
Output is correct |
2 |
Correct |
269 ms |
612 KB |
Output is correct |
3 |
Correct |
237 ms |
712 KB |
Output is correct |
4 |
Correct |
239 ms |
700 KB |
Output is correct |
5 |
Correct |
289 ms |
584 KB |
Output is correct |
6 |
Correct |
203 ms |
588 KB |
Output is correct |
7 |
Correct |
344 ms |
688 KB |
Output is correct |
8 |
Correct |
325 ms |
708 KB |
Output is correct |
9 |
Correct |
298 ms |
708 KB |
Output is correct |
10 |
Correct |
320 ms |
640 KB |
Output is correct |
11 |
Correct |
374 ms |
860 KB |
Output is correct |
12 |
Correct |
337 ms |
712 KB |
Output is correct |
13 |
Correct |
289 ms |
636 KB |
Output is correct |
14 |
Correct |
311 ms |
728 KB |
Output is correct |
15 |
Correct |
307 ms |
716 KB |
Output is correct |
16 |
Correct |
328 ms |
724 KB |
Output is correct |
17 |
Correct |
327 ms |
704 KB |
Output is correct |
18 |
Correct |
270 ms |
732 KB |
Output is correct |
19 |
Correct |
298 ms |
728 KB |
Output is correct |
20 |
Correct |
322 ms |
732 KB |
Output is correct |
21 |
Correct |
341 ms |
648 KB |
Output is correct |
22 |
Correct |
302 ms |
736 KB |
Output is correct |
23 |
Correct |
308 ms |
836 KB |
Output is correct |
24 |
Correct |
285 ms |
648 KB |
Output is correct |
25 |
Correct |
284 ms |
768 KB |
Output is correct |
26 |
Correct |
298 ms |
636 KB |
Output is correct |
27 |
Correct |
281 ms |
720 KB |
Output is correct |
28 |
Correct |
359 ms |
720 KB |
Output is correct |
29 |
Correct |
283 ms |
724 KB |
Output is correct |
30 |
Correct |
279 ms |
636 KB |
Output is correct |
31 |
Correct |
305 ms |
624 KB |
Output is correct |
32 |
Correct |
477 ms |
840 KB |
Output is correct |
33 |
Correct |
399 ms |
744 KB |
Output is correct |
34 |
Correct |
4 ms |
336 KB |
Output is correct |
35 |
Correct |
4 ms |
336 KB |
Output is correct |
36 |
Correct |
5 ms |
464 KB |
Output is correct |
37 |
Correct |
4 ms |
336 KB |
Output is correct |
38 |
Correct |
4 ms |
336 KB |
Output is correct |
39 |
Correct |
4 ms |
336 KB |
Output is correct |
40 |
Correct |
5 ms |
436 KB |
Output is correct |
41 |
Correct |
7 ms |
432 KB |
Output is correct |
42 |
Correct |
7 ms |
336 KB |
Output is correct |
43 |
Correct |
6 ms |
336 KB |
Output is correct |
44 |
Correct |
6 ms |
464 KB |
Output is correct |
45 |
Correct |
7 ms |
464 KB |
Output is correct |
46 |
Correct |
6 ms |
464 KB |
Output is correct |
47 |
Correct |
1 ms |
336 KB |
Output is correct |
48 |
Correct |
1 ms |
336 KB |
Output is correct |
49 |
Correct |
0 ms |
336 KB |
Output is correct |
50 |
Correct |
1 ms |
336 KB |
Output is correct |
51 |
Correct |
0 ms |
336 KB |
Output is correct |
52 |
Correct |
0 ms |
336 KB |
Output is correct |
53 |
Correct |
0 ms |
396 KB |
Output is correct |
54 |
Correct |
1 ms |
336 KB |
Output is correct |
55 |
Correct |
0 ms |
336 KB |
Output is correct |
56 |
Correct |
1 ms |
336 KB |
Output is correct |
57 |
Correct |
1 ms |
336 KB |
Output is correct |
58 |
Correct |
1 ms |
336 KB |
Output is correct |
59 |
Correct |
1 ms |
336 KB |
Output is correct |
60 |
Correct |
0 ms |
336 KB |
Output is correct |
61 |
Correct |
0 ms |
336 KB |
Output is correct |
62 |
Correct |
0 ms |
336 KB |
Output is correct |
63 |
Correct |
1 ms |
384 KB |
Output is correct |
64 |
Correct |
0 ms |
336 KB |
Output is correct |
65 |
Correct |
0 ms |
336 KB |
Output is correct |
66 |
Correct |
0 ms |
336 KB |
Output is correct |
67 |
Correct |
0 ms |
336 KB |
Output is correct |
68 |
Correct |
0 ms |
336 KB |
Output is correct |
69 |
Correct |
0 ms |
336 KB |
Output is correct |
70 |
Correct |
0 ms |
336 KB |
Output is correct |
71 |
Correct |
0 ms |
336 KB |
Output is correct |
72 |
Correct |
0 ms |
336 KB |
Output is correct |