oj.uz

Submission #150821

# Submission time Handle Problem Language Result Execution time Memory
150821 2019-09-01T08:57:50 Z 서울대학교 연구공원 944동 삼성전자서울대연구소(#3600, ho94949, dotorya, zigui) Trip to the Galapagos Islands (FXCUP4_island) C++17
31 / 100
 5000 ms 170300 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][32][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 < 300; 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 3491 ms 170196 KB Output is correct
2 Correct 3021 ms 170164 KB Output is correct
3 Correct 3013 ms 170168 KB Output is correct
4 Correct 3293 ms 170144 KB Output is correct
5 Correct 3651 ms 170168 KB Output is correct
6 Correct 3466 ms 170168 KB Output is correct
7 Correct 3694 ms 170172 KB Output is correct
8 Correct 3428 ms 170300 KB Output is correct
9 Correct 3623 ms 170168 KB Output is correct
10 Correct 3215 ms 170172 KB Output is correct

Subtask #2
0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7424 KB Output is correct
2 Correct 11 ms 7552 KB Output is correct
3 Correct 293 ms 48612 KB Output is correct
4 Correct 352 ms 48740 KB Output is correct
5 Correct 456 ms 48608 KB Output is correct
6 Correct 690 ms 48736 KB Output is correct
7 Correct 1153 ms 48936 KB Output is correct
8 Correct 2260 ms 49892 KB Output is correct
9 Execution timed out 5101 ms 50732 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 7424 KB Output is correct
2 Correct 11 ms 7552 KB Output is correct
3 Correct 3491 ms 170196 KB Output is correct
4 Correct 3021 ms 170164 KB Output is correct
5 Correct 3013 ms 170168 KB Output is correct
6 Correct 3293 ms 170144 KB Output is correct
7 Correct 3651 ms 170168 KB Output is correct
8 Correct 3466 ms 170168 KB Output is correct
9 Correct 3694 ms 170172 KB Output is correct
10 Correct 3428 ms 170300 KB Output is correct
11 Correct 3623 ms 170168 KB Output is correct
12 Correct 3215 ms 170172 KB Output is correct
13 Correct 293 ms 48612 KB Output is correct
14 Correct 352 ms 48740 KB Output is correct
15 Correct 456 ms 48608 KB Output is correct
16 Correct 690 ms 48736 KB Output is correct
17 Correct 1153 ms 48936 KB Output is correct
18 Correct 2260 ms 49892 KB Output is correct
19 Execution timed out 5101 ms 50732 KB Time limit exceeded
20 Halted 0 ms 0 KB -