Submission #243697

#	Time	Username	Problem	Language	Result	Execution time	Memory
243697		xiryss	Synchronization (JOI13_synchronization)	C++17	100 / 100	460 ms	21224 KiB

synchronization

//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
//#pragma GCC optimize("unroll-loops")
/*#pragma GCC optimize("section-anchors")
#pragma GCC optimize("profile-values,profile-reorder-functions,tracer")
#pragma GCC optimize("vpt")
#pragma GCC optimize("rename-registers")
#pragma GCC optimize("move-loop-invariants")
#pragma GCC optimize("unswitch-loops")
#pragma GCC optimize("function-sections")
#pragma GCC optimize("data-sections")
#pragma GCC optimize("branch-target-load-optimize")
#pragma GCC optimize("branch-target-load-optimize2")
#pragma GCC optimize("btr-bb-exclusive")*/
//#pragma comment(linker, "/STACK:367077216")
#define _CRT_SECURE_NO_WARNINGS
#include <chrono>
#include <set>
#include <map>
#include <deque>
#include <string>
#include <cstdint>
#include <cmath>
#include <queue>
#include <cassert>
#include <random>
#include <bitset>
#include <iomanip>
#include <numeric>
#include <time.h>//////////////
#include <ctime>
#include <string>
#include <cstdio>
#include <vector>
#include <cstdlib>
#include <iostream>
#include <algorithm>
#include <unordered_map>
#include <unordered_set>
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
//#define endl '\n'
#define mp make_pair
#define pbc push_back
#define pob pop_back()
#define empb emplace_back
#define queuel queue<long long>
#define sqr(a) ((a) * (a))
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pin(p) cin >> p.first >> p.second;
#define uniq(a) sort(all(a));(a).resize(unique(all(a)) - a.begin());
#define rev(v) reverse(v.begin(), v.end());
#define sout(s, c) for (auto i : s) cout << i << c;
#define pout(p) cout << p.first << " " << p.second;
#define er(v, l, r) erase(v.begin() + l, v.begin() + r);
#define vin(v) for (ll i = 0; i < v.size(); ++i) cin >> v[i];
#define vout(v, c) for (int i = 0; i < v.size(); ++i) cout << v[i] << c;
#define pushi(v, a) for (int i = 0; i < a.size(); ++i) v.push_back(a[i]);
#define fastio() ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0); srand(time(NULL))
#define dab(v) for(auto i:v)cout<<i<<' ';
#define sp system("pause")
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
using namespace std;
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++
mt19937 rnd(time(0) + 228 + 'k' + 'e' + 'k' + 'e' + 'r' + 'o' + 'f' + 'e' + 'y');
const ld EPS = 1e-10;
bool checkprime(int x)
{
	for (int i = 2; i * i <= x; ++i) if (x % i == 0) return 0;
	return 1;
}
const ld PI = acos(-1);
const int MOD7 = 1000000007;
const int MOD9 = 1000000009;
int mod = MOD7;
const int inf = 1e9;
const int MAXN = 1e5 + 1;
int f[MAXN * 2];
vector<int> g[MAXN];
vector<pair<int, int>> e;
int  n, m, q;
void add(int i, int x)
{
	for (; i < 2*MAXN; i |= (i + 1)) f[i] += x;
}
int get(int r)
{
	int ans = 0;
	for (; r >= 0; r = (r & (r + 1)) - 1) ans += f[r];
	return ans;
}
const int lgg = 17;
int tl = 0;
int tin[MAXN];
int up[MAXN][lgg];
int h[MAXN];
int tout[MAXN];
void dfs(int v, int p)
{
	tin[v] = tl++;
	up[v][0] = p;
	h[v] = h[p] + 1;
	for (int i = 1; i < lgg; ++i)
	{
		up[v][i] = up[up[v][i - 1]][i - 1];
	}
	for (int i : g[v])
	{
		if (i == p) continue;
		dfs(i, v);
	}
	tout[v] = tl++;
}
int a[MAXN];
int c[MAXN];
bool pp(int a, int b)
{
	return tin[a] <= tin[b] && tout[a] >= tout[b];
}
int lca(int a, int b)
{
	if (pp(a, b)) return  a;
	if (pp(b, a)) return b;
	for (int i = lgg - 1; i >= 0; --i)
	{
		if (pp(up[a][i], b)) a = up[a][i];
	}
	return a;
}
int toroot(int v)
{
	return get(tin[v]);
}
int pquery(int a, int b)
{
	return toroot(a) + toroot(b) - 2 * toroot(lca(a, b));
}
void upd(int v, int x)
{
	add(tin[v], x);
	add(tout[v] + 1, -x);
}
int exist(int a, int b)
{
	return pquery(a, b) == h[b] - h[a];
}
int getroot(int v)
{
	int tv = v;
	for (int i = lgg - 1; i >= 0; --i) if (exist(up[tv][i], v)) tv = up[tv][i];
	return tv;
}
bool on[MAXN];
signed main()
{
	fastio();
	cin >> n >> m >> q;
	for (int i = 0; i < n - 1; ++i)
	{
		int a, b;
		cin >> a >> b;
		e.pbc({ a,b });
		g[a].pbc(b);
		g[b].pbc(a);
	}
	h[1] = -1;
	dfs(1, 1);
	for (int i = 0; i < e.size(); ++i)
	{
		if (h[e[i].first] > h[e[i].second]) swap(e[i].first, e[i].second);
	}
	fill(a, a + MAXN, 1);
	for (int i = 0; i < m; ++i)
	{
		int  x;
		cin >> x;
		--x;
		int fs = e[x].first, ss = e[x].second;
		if (!on[x])
		{
			int xxx = getroot(fs);
			a[fs] = a[xxx];
			a[ss] = a[fs] + a[ss] - c[ss];
			a[fs] = a[ss];
			a[xxx] = a[fs];
			upd(ss, 1);
		}
		else
		{
			a[ss] = a[getroot(ss)];
			c[ss] = a[ss];
			upd(ss, -1);
		}
		on[x] ^= 1;
	}
	for (int i = 0; i < q; ++i)
	{
		int x;
		cin >> x;
		cout << a[getroot(x)] << '\n';
	}
	//sp;
}

Compilation message (stderr)

synchronization.cpp: In function 'int main()':
synchronization.cpp:172:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < e.size(); ++i)
                  ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40