/*input
3
1 2 1
2 3 1
3 1 2
*/
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const int maxn = 101010;
vector<ll>adj[maxn];
ll pa[maxn], sz[maxn];
void dfs(ll i, ll p)
{
if (p != 0)
adj[i].erase(find(adj[i].begin(), adj[i].end(), p));
pa[i] = p;
sz[i] = 1;
pair<ll, ll>mx = { -1, -1};
for (ll t = 0; t < (ll)adj[i].size(); t++)
{
ll j = adj[i][t];
dfs(j, i);
sz[i] += sz[j];
mx = max(mx, {sz[j], t});
}
if (mx.second != -1)
swap(adj[i][0], adj[i][mx.second]);
}
ll timer = 1;
ll nr[maxn], head[maxn], tail[maxn];
void hld(ll i, ll h)
{
nr[i] = timer++;
head[i] = h;
tail[h] = i;
for (ll t = 0; t < (ll)adj[i].size(); t++)
{
ll j = adj[i][t];
hld(j, t == 0 ? h : j);
}
}
struct line
{
ll cc = 0, cd = maxn, dd = 0, dc = maxn;
line() {}
};
line merge(line a, line b)
{
line c;
c.cc = min({a.cc + b.cc, a.cc + b.dc + 1, a.cd + b.cc + 1, a.cd + b.dc});
c.cd = min({a.cc + b.cd, a.cc + b.dd + 1, a.cd + b.cd + 1, a.cd + b.dd});
c.dd = min({a.dc + b.cd, a.dc + b.dd + 1, a.dd + b.cd + 1, a.dd + b.dd});
c.dc = min({a.dc + b.cc, a.dc + b.dc + 1, a.dd + b.cc + 1, a.dd + b.dc});
return c;
}
struct ST
{
line X;
ll l, r;
ST *left, *right;
ST(ll l, ll r): l(l), r(r)
{
if (l < r)
{
left = new ST(l, (l + r) / 2);
right = new ST((l + r) / 2 + 1, r);
X = merge(left->X, right->X);
}
}
line get(ll x, ll y)
{
if (x <= l && r <= y)
return X;
if (r < x || y < l)
return line();
return merge(left->get(x, y), right->get(x, y));
}
void set(ll x, ll w, int c)
{
if (l == r)
{
if (c)
X.cc = w;
else
X.dd = w;
}
else
{
if (x <= (l + r) / 2)
left->set(x, w, c);
else
right->set(x, w, c);
X = merge(left->X, right->X);
}
}
} medis(0, 101010);
void initialize(int N, vector<int> A, vector<int> B)
{
for (int i = 0; i < N - 1; i++)
{
adj[A[i]].push_back(B[i]);
adj[B[i]].push_back(A[i]);
}
dfs(1, 0);
hld(1, 1);
}
ll C[maxn], D[maxn], V[maxn];
void fix(ll v)
{
while (true)
{
ll w = head[v];
line X = medis.get(nr[w], nr[tail[w]]);
C[pa[w]] -= min({X.cd, X.cc, X.dc + 1, X.dd + 1});
D[pa[w]] -= min({X.cd + 1, X.cc + 1, X.dc, X.dd});
medis.set(nr[v], maxn, 0);
medis.set(nr[v], maxn, 1);
if (V[v] != 1)
medis.set(nr[v], C[v], 1);
if (V[v] != -1)
medis.set(nr[v], D[v], 0);
X = medis.get(nr[w], nr[tail[w]]);
C[pa[w]] += min({X.cd, X.cc, X.dc + 1, X.dd + 1});
D[pa[w]] += min({X.cd + 1, X.cc + 1, X.dc, X.dd});
if (v == 1)break;
if (v != w)
v = w;
else
v = pa[v];
}
}
int cat(int v)
{
V[v] = -1;
fix(v);
return min(C[0], D[0]);
}
int dog(int v)
{
V[v] = 1;
fix(v);
return min(C[0], D[0]);
}
int neighbor(int v)
{
V[v] = 0;
fix(v);
return min(C[0], D[0]);
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
24 ms |
18552 KB |
Output is correct |
2 |
Correct |
24 ms |
18552 KB |
Output is correct |
3 |
Correct |
24 ms |
18552 KB |
Output is correct |
4 |
Correct |
24 ms |
18552 KB |
Output is correct |
5 |
Correct |
24 ms |
18552 KB |
Output is correct |
6 |
Correct |
24 ms |
18552 KB |
Output is correct |
7 |
Correct |
24 ms |
18552 KB |
Output is correct |
8 |
Correct |
24 ms |
18552 KB |
Output is correct |
9 |
Correct |
24 ms |
18552 KB |
Output is correct |
10 |
Correct |
24 ms |
18552 KB |
Output is correct |
11 |
Correct |
24 ms |
18552 KB |
Output is correct |
12 |
Correct |
28 ms |
18552 KB |
Output is correct |
13 |
Correct |
28 ms |
18552 KB |
Output is correct |
14 |
Correct |
24 ms |
18552 KB |
Output is correct |
15 |
Correct |
24 ms |
18552 KB |
Output is correct |
16 |
Correct |
25 ms |
18552 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
24 ms |
18552 KB |
Output is correct |
2 |
Correct |
24 ms |
18552 KB |
Output is correct |
3 |
Correct |
24 ms |
18552 KB |
Output is correct |
4 |
Correct |
24 ms |
18552 KB |
Output is correct |
5 |
Correct |
24 ms |
18552 KB |
Output is correct |
6 |
Correct |
24 ms |
18552 KB |
Output is correct |
7 |
Correct |
24 ms |
18552 KB |
Output is correct |
8 |
Correct |
24 ms |
18552 KB |
Output is correct |
9 |
Correct |
24 ms |
18552 KB |
Output is correct |
10 |
Correct |
24 ms |
18552 KB |
Output is correct |
11 |
Correct |
24 ms |
18552 KB |
Output is correct |
12 |
Correct |
28 ms |
18552 KB |
Output is correct |
13 |
Correct |
28 ms |
18552 KB |
Output is correct |
14 |
Correct |
24 ms |
18552 KB |
Output is correct |
15 |
Correct |
24 ms |
18552 KB |
Output is correct |
16 |
Correct |
25 ms |
18552 KB |
Output is correct |
17 |
Correct |
31 ms |
18700 KB |
Output is correct |
18 |
Correct |
32 ms |
18680 KB |
Output is correct |
19 |
Correct |
27 ms |
18680 KB |
Output is correct |
20 |
Correct |
24 ms |
18552 KB |
Output is correct |
21 |
Correct |
27 ms |
18552 KB |
Output is correct |
22 |
Correct |
30 ms |
18552 KB |
Output is correct |
23 |
Correct |
34 ms |
18680 KB |
Output is correct |
24 |
Correct |
36 ms |
18680 KB |
Output is correct |
25 |
Correct |
30 ms |
18552 KB |
Output is correct |
26 |
Correct |
27 ms |
18552 KB |
Output is correct |
27 |
Correct |
26 ms |
18552 KB |
Output is correct |
28 |
Correct |
28 ms |
18680 KB |
Output is correct |
29 |
Correct |
29 ms |
18680 KB |
Output is correct |
30 |
Correct |
31 ms |
18552 KB |
Output is correct |
31 |
Correct |
25 ms |
18680 KB |
Output is correct |
32 |
Correct |
29 ms |
18624 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
24 ms |
18552 KB |
Output is correct |
2 |
Correct |
24 ms |
18552 KB |
Output is correct |
3 |
Correct |
24 ms |
18552 KB |
Output is correct |
4 |
Correct |
24 ms |
18552 KB |
Output is correct |
5 |
Correct |
24 ms |
18552 KB |
Output is correct |
6 |
Correct |
24 ms |
18552 KB |
Output is correct |
7 |
Correct |
24 ms |
18552 KB |
Output is correct |
8 |
Correct |
24 ms |
18552 KB |
Output is correct |
9 |
Correct |
24 ms |
18552 KB |
Output is correct |
10 |
Correct |
24 ms |
18552 KB |
Output is correct |
11 |
Correct |
24 ms |
18552 KB |
Output is correct |
12 |
Correct |
28 ms |
18552 KB |
Output is correct |
13 |
Correct |
28 ms |
18552 KB |
Output is correct |
14 |
Correct |
24 ms |
18552 KB |
Output is correct |
15 |
Correct |
24 ms |
18552 KB |
Output is correct |
16 |
Correct |
25 ms |
18552 KB |
Output is correct |
17 |
Correct |
31 ms |
18700 KB |
Output is correct |
18 |
Correct |
32 ms |
18680 KB |
Output is correct |
19 |
Correct |
27 ms |
18680 KB |
Output is correct |
20 |
Correct |
24 ms |
18552 KB |
Output is correct |
21 |
Correct |
27 ms |
18552 KB |
Output is correct |
22 |
Correct |
30 ms |
18552 KB |
Output is correct |
23 |
Correct |
34 ms |
18680 KB |
Output is correct |
24 |
Correct |
36 ms |
18680 KB |
Output is correct |
25 |
Correct |
30 ms |
18552 KB |
Output is correct |
26 |
Correct |
27 ms |
18552 KB |
Output is correct |
27 |
Correct |
26 ms |
18552 KB |
Output is correct |
28 |
Correct |
28 ms |
18680 KB |
Output is correct |
29 |
Correct |
29 ms |
18680 KB |
Output is correct |
30 |
Correct |
31 ms |
18552 KB |
Output is correct |
31 |
Correct |
25 ms |
18680 KB |
Output is correct |
32 |
Correct |
29 ms |
18624 KB |
Output is correct |
33 |
Correct |
1487 ms |
26188 KB |
Output is correct |
34 |
Correct |
399 ms |
26616 KB |
Output is correct |
35 |
Correct |
1395 ms |
24532 KB |
Output is correct |
36 |
Correct |
2168 ms |
30752 KB |
Output is correct |
37 |
Correct |
49 ms |
22392 KB |
Output is correct |
38 |
Correct |
2445 ms |
32148 KB |
Output is correct |
39 |
Correct |
2384 ms |
32148 KB |
Output is correct |
40 |
Correct |
2327 ms |
32156 KB |
Output is correct |
41 |
Correct |
2481 ms |
32164 KB |
Output is correct |
42 |
Correct |
2239 ms |
32168 KB |
Output is correct |
43 |
Correct |
2368 ms |
32196 KB |
Output is correct |
44 |
Correct |
2126 ms |
32052 KB |
Output is correct |
45 |
Correct |
2274 ms |
32164 KB |
Output is correct |
46 |
Correct |
2246 ms |
32156 KB |
Output is correct |
47 |
Correct |
2332 ms |
32152 KB |
Output is correct |
48 |
Correct |
541 ms |
27388 KB |
Output is correct |
49 |
Correct |
541 ms |
29280 KB |
Output is correct |
50 |
Correct |
236 ms |
21200 KB |
Output is correct |
51 |
Correct |
242 ms |
23052 KB |
Output is correct |
52 |
Correct |
111 ms |
20980 KB |
Output is correct |
53 |
Correct |
929 ms |
30808 KB |
Output is correct |
54 |
Correct |
788 ms |
24360 KB |
Output is correct |
55 |
Correct |
2001 ms |
28296 KB |
Output is correct |
56 |
Correct |
1320 ms |
25304 KB |
Output is correct |
57 |
Correct |
1704 ms |
29004 KB |
Output is correct |
58 |
Correct |
98 ms |
22824 KB |
Output is correct |
59 |
Correct |
247 ms |
22140 KB |
Output is correct |
60 |
Correct |
480 ms |
27204 KB |
Output is correct |
61 |
Correct |
525 ms |
27588 KB |
Output is correct |
62 |
Correct |
291 ms |
25676 KB |
Output is correct |
63 |
Correct |
147 ms |
25976 KB |
Output is correct |
64 |
Correct |
164 ms |
27876 KB |
Output is correct |
65 |
Correct |
174 ms |
32964 KB |
Output is correct |
66 |
Correct |
329 ms |
22140 KB |
Output is correct |
67 |
Correct |
227 ms |
28664 KB |
Output is correct |
68 |
Correct |
494 ms |
32888 KB |
Output is correct |
69 |
Correct |
182 ms |
19960 KB |
Output is correct |
70 |
Correct |
67 ms |
18808 KB |
Output is correct |
71 |
Correct |
265 ms |
25464 KB |
Output is correct |
72 |
Correct |
313 ms |
31268 KB |
Output is correct |
73 |
Correct |
760 ms |
36472 KB |
Output is correct |
74 |
Correct |
784 ms |
32168 KB |
Output is correct |
75 |
Correct |
571 ms |
36380 KB |
Output is correct |
76 |
Correct |
567 ms |
34856 KB |
Output is correct |
77 |
Correct |
779 ms |
32540 KB |
Output is correct |