// EXPLOSION!
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<unordered_set>
#include<unordered_map>
#include<chrono>
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpi;
typedef vector<pair<ll, ll>> vpll;
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
#define pb push_back
#define mp make_pair
#define rsz resize
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define f first
#define s second
#define cont continue
#define endl '\n'
//#define ednl '\n'
#define test int testc;cin>>testc;while(testc--)
#define pr(a, b) trav(x,a)cerr << x << b; cerr << endl;
#define message cout << "Hello World" << endl;
const int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 }; // for every grid problem!!
const ll linf = 4000000000000000000LL;
const ll inf = 998244353;//998244353 1000000007
void pv(vi a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vll a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vector<vi>a) {
F0R(i, sz(a)) { cout << i << endl; pv(a[i]); cout << endl; }
}void pv(vector<vll>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); }cout << endl; }void pv(vector<string>a) { trav(x, a)cout << x << endl; cout << endl; }
void setIO(string s) {
ios_base::sync_with_stdio(0); cin.tie(0);
#ifdef arwaeystoamneg
if (sz(s))
{
freopen((s + ".in").c_str(), "r", stdin);
if (s != "test1")
freopen((s + ".out").c_str(), "w", stdout);
}
#endif
}
template<class T>class segment_tree
{
struct item
{
T sum;
};
item single(T i)
{
return { i };
}
item merge(item x, item y)
{
item ans;
ans.sum = x.sum + y.sum;
return ans;
}
vector<item> tree;
vector<item>A;
int height;
item neutral = { 0 };
public:void build(vector<T>& B)
{
int n = B.size();
height = log2(n + 1) + 1;
A.rsz(n);
tree.rsz((1 << height + 1) - 1);
F0R(i, n)A[i] = single(B[i]);
A.rsz(1 << height, neutral);
build(A, 0, 0, (1 << height) - 1);
}
void build(vector<item>& A, int v, int tl, int tr)
{
if (tl == tr)
tree[v] = A[tl];
else
{
int mid = (tl + tr) / 2;
build(A, 2 * v + 1, tl, mid);
build(A, 2 * v + 2, mid + 1, tr);
tree[v] = merge(tree[2 * v + 1], tree[2 * v + 2]);
}
}
public:T query(int l, int r)
{
return query(0, 0, (1 << height) - 1, l, r).sum;
}
item query(int v, int tl, int tr, int l, int r)
{
if (r<tl || l>tr)return neutral;
if (l <= tl && r >= tr)
{
return tree[v];
}
int mid = (tl + tr) / 2;
return merge(query(2 * v + 1, tl, mid, l, r), query(2 * v + 2, mid + 1, tr, l, r));
}
//assign
public:void update(int pos, T val)
{
update(0, 0, (1 << height) - 1, pos, single(val));
}
void update(int v, int tl, int tr, int pos, item val)
{
if (tl == tr)
{
tree[v] = merge(tree[v], val);
}
else
{
int mid = (tl + tr) / 2;
if (pos <= mid)
update(2 * v + 1, tl, mid, pos, val);
else
update(2 * v + 2, mid + 1, tr, pos, val);
tree[v] = merge(tree[2 * v + 1], tree[2 * v + 2]);
}
}
public:int get(int k)
{
return get(0, 0, (1 << height) - 1, k);
}
int get(int v, int tl, int tr, int k)
{
if (tl == tr)return tl;
int mid = (tl + tr) / 2;
if (k > tree[2 * v + 1].sum)
return get(2 * v + 2, mid + 1, tr, k - tree[2 * v + 1].sum);
return get(2 * v + 1, tl, mid, k);
}
};
struct e
{
int x, y;
int ans;
bool a;
int get(int z)
{
return x + y - z;
}
};
const int MAX = 100005, SZ = 20;
e edge[MAX];
int n, m, q, tin[MAX], order[MAX], sizes[MAX], ptr, parent[MAX], ans[MAX], jump[SZ][MAX];
vi adj[MAX];
segment_tree<ll>sum;
void dfs(int i, int p = -1)
{
sizes[i] = 1;
parent[i] = p;
tin[i] = ptr;
order[ptr++] = i;
trav(x, adj[i])
{
int j = edge[x].get(i);
if (j == p)continue;
dfs(j, i);
sizes[i] += sizes[j];
}
}
int get(int i, ll c)
{
R0F(j, SZ)
{
int k = jump[j][i];
if (k == -1)continue;
if (sum.query(0, tin[k]) == c)i = k;
}
return i;
}
int main()
{
setIO("test1");
cin >> n >> m >> q;
F0R(i, n - 1)
{
int x, y;
cin >> x >> y;
edge[i] = { --x,--y,0,0 };
adj[x].pb(i);
adj[y].pb(i);
}
vll temp(n + 1, 1);
sum.build(temp);
dfs(0);
F0R(i, n - 1)if (parent[edge[i].x] == edge[i].y)swap(edge[i].x, edge[i].y);
fill(ans, ans + n, 1);
F0R(i, n)jump[0][i] = parent[i];
F0R(i, SZ - 1)
{
F0R(j, n)
{
jump[i + 1][j] = (jump[i][j] == -1 ? -1 : jump[i][jump[i][j]]);
}
}
while (m--)
{
int i;
cin >> i;
i--;
if (edge[i].a == 0)
{
ll c = sum.query(0, tin[edge[i].x]);
int j = get(edge[i].x, c);
ans[j] += ans[edge[i].y] - edge[i].ans;
ll d = sum.query(0, tin[j]) - sum.query(0, tin[edge[i].y]);
sum.update(tin[edge[i].y], d);
sum.update(tin[edge[i].y] + sizes[edge[i].y], -d);
}
else
{
ll c = sum.query(0, tin[edge[i].x]);
int j = get(edge[i].x, c);
edge[i].ans = ans[j];
ans[edge[i].y] = ans[j];
ll d = edge[i].y + 1 - sum.query(0, tin[edge[i].y] - 1);
sum.update(tin[edge[i].y], d);
sum.update(tin[edge[i].y] + sizes[edge[i].y], -d);
}
edge[i].a ^= 1;
}
while (q--)
{
int i;
cin >> i;
i--;
ll c = sum.query(0, tin[i]);
int j = get(i, c);
cout << ans[j] << endl;
}
}
Compilation message
synchronization.cpp: In instantiation of 'void segment_tree<T>::build(std::vector<_Tp>&) [with T = long long int]':
synchronization.cpp:198:16: required from here
synchronization.cpp:80:24: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
80 | tree.rsz((1 << height + 1) - 1);
| ~~~~~~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2764 KB |
Output is correct |
| 2 |
Correct |
3 ms |
2764 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2680 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2764 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2796 KB |
Output is correct |
| 6 |
Correct |
6 ms |
2892 KB |
Output is correct |
| 7 |
Correct |
44 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
32 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
40 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
526 ms |
21328 KB |
Output is correct |
| 11 |
Correct |
513 ms |
21448 KB |
Output is correct |
| 12 |
Correct |
1004 ms |
29064 KB |
Output is correct |
| 13 |
Correct |
244 ms |
22864 KB |
Output is correct |
| 14 |
Correct |
333 ms |
22464 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
269 ms |
25500 KB |
Output is correct |
| 2 |
Correct |
242 ms |
25324 KB |
Output is correct |
| 3 |
Correct |
279 ms |
29108 KB |
Output is correct |
| 4 |
Correct |
285 ms |
29036 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
2764 KB |
Output is correct |
| 2 |
Correct |
3 ms |
2764 KB |
Output is correct |
| 3 |
Incorrect |
3 ms |
2800 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1153 ms |
29284 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2764 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
2764 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
