oj.uz

Submission #150776

# Submission time Handle Problem Language Result Execution time Memory
150776 2019-09-01T08:55:14 Z 서울대학교 연구공원 944동 삼성전자서울대연구소(#3600, ho94949, dotorya, zigui) Trip to the Galapagos Islands (FXCUP4_island) C++17
31 / 100
 5000 ms 119356 KB 
#include "island.h"

#include <stdio.h>  
#include <algorithm>  
#include <assert.h>
#include <bitset>
#include <cmath>  
#include <complex>  
#include <deque>  
#include <functional>  
#include <iostream>  
#include <limits.h>  
#include <map>  
#include <math.h>  
#include <queue>  
#include <set>  
#include <stdlib.h>  
#include <string.h>  
#include <string>  
#include <time.h>  
#include <unordered_map>  
#include <unordered_set>  
#include <vector>  

#pragma warning(disable:4996)  
#pragma comment(linker, "/STACK:336777216")  
using namespace std;

#pragma gcc optimize("Ofast")

#define mp make_pair  
#define Fi first  
#define Se second  
#define pb(x) push_back(x)  
#define szz(x) ((int)(x).size())  
#define rep(i, n) for(int i=0;i<n;i++)  
#define all(x) (x).begin(), (x).end()  
#define ldb ldouble  

typedef tuple<int, int, int> t3;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
typedef pair <ll, int> pli;
typedef pair <db, db> pdd;

int IT_MAX = 1 << 19;
const ll MOD = 1000000007;
const int INF = 0x3f3f3f3f;
const ll LL_INF = 0x3f3f3f3f3f3f3f3f;
const db PI = acos(-1);
const db ERR = 1e-10;

int r[100050];
int sz[100050][2];
int root(int x) {
	return (x == r[x]) ? x : (r[x] = root(r[x]));
}

vector <pair<pii, int>> Ve;
vector <pii> conn[100050];
vector <pii> son[100050];
int par[100050][17][2];
int dep[100050];
int col[100050];

int tus;
int lr[100050][2];
bool dchk[100050];
void DFS(int n) {
	lr[n][0] = ++tus;
	dchk[n] = true;
	for (auto it : conn[n]) {
		if (dchk[it.second]) continue;
		int nn = it.second;
		par[nn][0][0] = n;
		par[nn][0][1] = it.first;
		for (int i = 1; i < 17; i++) {
			int p = par[nn][i - 1][0];
			par[nn][i][0] = par[p][i - 1][0];
			par[nn][i][1] = min(par[p][i - 1][1], par[nn][i - 1][1]);
		}
		son[n].push_back(it);
		dep[nn] = dep[n] + 1;
		DFS(nn);
	}

	lr[n][1] = tus;
}

pii upnode(int a, int c) {
	int mn = INF;
	for (int i = 16; i >= 0; i--) {
		if (c & (1 << i)) {
			mn = min(mn, par[a][i][1]);
			a = par[a][i][0];
		}
	}
	return pii(a, mn);
}
int lca(int a, int b) {
	if (dep[a] > dep[b]) swap(a, b);

	int c = dep[b] - dep[a];
	b = upnode(b, c).first;

	if (a == b) return a;

	for (int i = 16; i >= 0; i--) {
		if (par[a][i][0] != par[b][i][0]) {
			a = par[a][i][0];
			b = par[b][i][0];
		}
	}
	return par[a][0][0];
}

int dis[100050];
void DFS2(int n, int c) {
	dis[n] = -INF;
	if (col[n] == c) dis[n] = INF;
	for (auto it : son[n]) {
		DFS2(it.second, c);
		dis[n] = max(dis[n], min(dis[it.second], it.first));
	}
}
void DFS3(int n) {
	for (auto it : son[n]) {
		dis[it.second] = max(dis[it.second], min(dis[n], it.first));
		DFS3(it.second);
	}
}

int ch[100050]; // answer array
int ans[505][100050];
vector <int> Vc[100050];

int u[100050];

void Init(int K, std::vector<int> F, std::vector<int> S, std::vector<int> E) {
	int N = F.size(), M = S.size(), i, j;

	for (i = 0; i < N; i++) col[i] = F[i];
	for (i = 0; i < N; i++) Vc[F[i]].push_back(i);

	for (i = 0; i < N; i++) r[i] = i;
	for (i = M - 1; i >= 0; i--) {
		int t1 = S[i], t2 = E[i];
		if (root(t1) == root(t2)) continue;
		int r1 = root(t1), r2 = root(t2);
		r[r1] = r2;
		Ve.emplace_back(pii(t1, t2), i);
		conn[t1].emplace_back(i, t2);
		conn[t2].emplace_back(i, t1);
	}
	for (i = 0; i < 17; i++) {
		par[0][i][0] = 0;
		par[0][i][1] = INF;
	}
	DFS(0);

	for (i = 0; i < K; i++) u[i] = i;
	sort(u, u + K, [](int a, int b) {
		if (Vc[a].size() != Vc[b].size()) return Vc[a].size() > Vc[b].size();
		return a > b;
	});

	for (i = 0; i < K; i++) ch[i] = -1;

	for (i = 0; i < K && i < 200; i++) {
		int c = u[i];
		ch[c] = i;
		for (j = 0; j < N; j++) dis[j] = -1;
		DFS2(0, c);
		DFS3(0);

		for (j = 0; j < K; j++) ans[i][j] = -1;
		for (j = 0; j < N; j++) ans[i][F[j]] = max(ans[i][F[j]], dis[j]);
	}

	for (i = 0; i < N; i++) {
		r[i] = i;
		sz[i][0] = sz[i][1] = 0;
	}
}

int ispar(int a, int b) {
	if (dep[a] <= dep[b]) return -INF;

	pii u = upnode(a, dep[a] - dep[b]);
	if (u.first == b) return u.second;
	else return -INF;
}

map <pii, int> Ma;
int Vl[10050];
int vlc;
int Separate(int A, int B) {
	if (A > B) swap(A, B);
	if (ch[A] >= 0) return ans[ch[A]][B] + 1;
	if (ch[B] >= 0) return ans[ch[B]][A] + 1;
	if (Ma.count(pii(A, B))) return Ma[pii(A, B)];

	int vlc = 0;
	vector <int> Vu;
	for (auto it : Vc[A]) Vl[vlc++] = it;
	for (auto it : Vc[B]) Vl[vlc++] = it;
	sort(Vl, Vl + vlc, [](int a, int b) {
		return lr[a][0] < lr[b][0];
	});
	vlc = unique(Vl, Vl + vlc) - Vl;

	int ovlc = vlc;
	for (int i = 0; i + 1 < ovlc; i++) Vl[vlc++] = lca(Vl[i], Vl[i + 1]);

	sort(Vl, Vl+vlc, [](int a, int b) {
		return lr[a][0] < lr[b][0];
	});
	vlc = unique(Vl, Vl + vlc) - Vl;

	Vu.clear();
	Vu.push_back(Vl[0]);

	vector <pair<int, pii>> Vet;
	for (int i = 1; i < vlc; i++) {
		int rv;

		while (1) {
			rv = ispar(Vl[i], Vu.back());
			if (rv != -INF) break;
			Vu.pop_back();
		}

		Vet.emplace_back(rv, pii(Vl[i], Vu.back()));
		Vu.push_back(Vl[i]);
	}
	sort(all(Vet));
	reverse(all(Vet));

	for (int i = 0; i < vlc; i++) {
		int it = Vl[i];
		r[it] = it;
		sz[it][0] = sz[it][1] = 0;
		if (col[it] == A) sz[it][0] = 1;
		if (col[it] == B) sz[it][1] = 1;
	}

	for (auto it : Vet) {
		int r1 = root(it.second.first), r2 = root(it.second.second);
		if (r1 == r2) continue;

		sz[r1][0] += sz[r2][0];
		sz[r1][1] += sz[r2][1];
		r[r2] = r1;
		if (sz[r1][0] && sz[r1][1]) return Ma[pii(A, B)] = it.first + 1;
	}
	return 0;
}

Compilation message

island.cpp:25:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable:4996)  
 
island.cpp:26:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/STACK:336777216")  
 
island.cpp:29:0: warning: ignoring #pragma gcc optimize [-Wunknown-pragmas]
 #pragma gcc optimize("Ofast")

Subtask #1
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2221 ms 119348 KB Output is correct
2 Correct 2373 ms 119348 KB Output is correct
3 Correct 2416 ms 119348 KB Output is correct
4 Correct 2241 ms 119356 KB Output is correct
5 Correct 2192 ms 119356 KB Output is correct
6 Correct 2548 ms 119356 KB Output is correct
7 Correct 2406 ms 119232 KB Output is correct
8 Correct 2576 ms 119356 KB Output is correct
9 Correct 2688 ms 119356 KB Output is correct
10 Correct 2914 ms 119356 KB Output is correct

Subtask #2
0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7552 KB Output is correct
2 Correct 10 ms 7552 KB Output is correct
3 Correct 288 ms 36576 KB Output is correct
4 Correct 370 ms 36960 KB Output is correct
5 Correct 633 ms 36836 KB Output is correct
6 Correct 982 ms 36964 KB Output is correct
7 Correct 1301 ms 37344 KB Output is correct
8 Correct 2810 ms 37984 KB Output is correct
9 Execution timed out 5101 ms 38372 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7552 KB Output is correct
2 Correct 10 ms 7552 KB Output is correct
3 Correct 2221 ms 119348 KB Output is correct
4 Correct 2373 ms 119348 KB Output is correct
5 Correct 2416 ms 119348 KB Output is correct
6 Correct 2241 ms 119356 KB Output is correct
7 Correct 2192 ms 119356 KB Output is correct
8 Correct 2548 ms 119356 KB Output is correct
9 Correct 2406 ms 119232 KB Output is correct
10 Correct 2576 ms 119356 KB Output is correct
11 Correct 2688 ms 119356 KB Output is correct
12 Correct 2914 ms 119356 KB Output is correct
13 Correct 288 ms 36576 KB Output is correct
14 Correct 370 ms 36960 KB Output is correct
15 Correct 633 ms 36836 KB Output is correct
16 Correct 982 ms 36964 KB Output is correct
17 Correct 1301 ms 37344 KB Output is correct
18 Correct 2810 ms 37984 KB Output is correct
19 Execution timed out 5101 ms 38372 KB Time limit exceeded
20 Halted 0 ms 0 KB -