Submission #283294

#	Time	Username	Problem	Language	Result	Execution time	Memory
283294		milleniumEeee	Werewolf (IOI18_werewolf)	C++14	0 / 100	1752 ms	76152 KiB

werewolf

#include "werewolf.h"
#include <bits/stdc++.h>
#include <random>
#include <chrono> 
#include <array>
using namespace std;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
#define szof(s) (int)s.size()
#define all(s) s.begin(), s.end()
#define prev prev123
#define pii pair<int, int>
#define fr first
#define sc second
typedef vector<int> vi;

const int MAXN = (int)2e5 + 5;
const int MAXM = (int)4e5 + 5;
const int MAXQ = (int)2e5 + 5;
 
vector <int> g[MAXN];
int N, M, Q;

struct Query {
  int s, e, l, r; 
  Query (int s_, int e_, int l_, int r_) {
    s = s_, e = e_, l = l_, r = r_;
  }
  Query () {
 
  }
}query[MAXQ];
 
struct Small_Solve {
  vector <int> ans;
  bool need() {
    return (N <= 3000 && M <= 6000 && Q <= 3000);
  }
  void solve() {		
    ans.resize(Q, 0);
    vector <int> used[3];
    used[1].resize(N, 0);
    used[2].resize(N, 0);
    int cnt = 0;
    for (int i = 0; i < Q; i++) {
      cnt++;
      queue <int> q[3];
      if (query[i].s >= query[i].l) {
        q[1].push(query[i].s);
      }
      if (query[i].e <= query[i].r) {
        q[2].push(query[i].e);
      }
      while (!q[1].empty()) {
        int v = q[1].front();
        q[1].pop();
        if (used[1][v] == cnt) {
          continue;
        }
        used[1][v] = cnt;
        for (int to : g[v]) {
          if (to >= query[i].l) {
            q[1].push(to);
          }
        }
      }
      while (!q[2].empty()) {
        int v = q[2].front();
        q[2].pop();
        if (used[2][v] == cnt) {
          continue;
        }
        used[2][v] = cnt;
        for (int to : g[v]) {
          if (to <= query[i].r) {
            q[2].push(to);
          }
        }
      }
      int found = 0;
      for (int v = 0; v < N; v++) {
        found |= (used[1][v] == cnt && used[2][v] == cnt);
      }
      ans[i] = found;
    }
  }
}subtask12;
 
struct Line_Solve {
  int start = -1, finish = -1;
  pii table[20][(int)2e5 + 5];
  int pows[20];
	vector <bool> used;
	vector <int> pos;
	vector <int> convert;  
  vector <int> ans;
	
  Line_Solve() {
		pows[0] = 1;
    for (int i = 0; i < 20; i++) {
      pows[i] = pows[i - 1] * 2;
    }
  }
  bool need() {
    if (M != N - 1) {
      return false;
    }
    for (int i = 0; i < N; i++) {
      if (szof(g[i]) == 1) {
        if (start == -1) {
          start = i;
        } else {
          finish = i;
        }
      }
    }
    return true;
  }
  pii merge(pii &a, pii &b) {
    return {min(a.fr, b.fr), max(a.sc, b.sc)};
  }
  bool in(int l1, int r1, int l2, int r2) { // l1...r1 in l2...r2
    return (l2 <= l1 && r1 <= r2);
  }
  pii get(int l, int r) {
    if (l == r) {
      return table[0][l];
    } else {
      int pw = log2(r - l + 1);
      return merge(table[pw][l], table[pw][r - pows[pw] + 1]);
    }
  };
 
  pii get_segment(int our_pos, int L, int R) {
    pii segment = {-1, -1};
    int l = -1, r = our_pos;
    while (r - l > 1) {
      int mid = (l + r) >> 1;
      pii pr = get(mid, our_pos);
      if (in(pr.fr, pr.sc, L, R)) {
        r = mid;
      } else {
        l = mid;
      }
    }
    segment.fr = r;
    l = our_pos, r = N;
    while (r - l > 1) {
      int mid = (l + r) >> 1;
      pii pr = get(our_pos, mid);
      if (in(pr.fr, pr.sc, L, R)) {
        l = mid;
      } else {
        r = mid;
      }
    }
    segment.sc = l;
    return segment;
  }

  void dfs(int v, int id) {
		used[v] = 1;
		pos[v] = id;
		convert[id] = v;
		for (int to : g[v]) {
			if (!used[to]) {
				dfs(to, id + 1);
			}
		}		
	}
  
  void solve() {
		used.resize(N, false);
		pos.resize(N);
		convert.resize(N);
    ans.resize(Q);
    dfs(start, 0);
    for (int pw = 0; pw < 20; pw++) {
      for (int i = 0; i < N; i++) {
        if (pw == 0) {
          table[pw][i] = {convert[i], convert[i]};
        } else if (i + pows[i] - 1 < N) {
          table[pw][i] = merge(table[pw - 1][i], table[pw - 1][i + pows[pw - 1]]);
        }
      }
    }
    for (int i = 0; i < Q; i++) {
      if ((query[i].s >= query[i].l && query[i].e <= query[i].r) == false) {
        ans[i] = 0;
        continue;
      }
      pii segment[3];
      segment[1] = get_segment(query[i].s, query[i].l, N - 1);
      segment[2] = get_segment(query[i].e, 0, query[i].r);
      ans[i] = !(segment[1].fr > segment[2].sc || segment[2].fr > segment[1].sc);
    }
  }
}subtask3;
 
vi check_validity(int NN, vi X, vi Y, vi S, vi E, vi L, vi R) {
  N = NN;
  M = szof(X);
  Q = szof(S);
  for (int i = 0; i < NN; i++) { 
		g[i].clear();
	}
  for (int i = 0; i < M; i++) {
    g[X[i]].push_back(Y[i]);
    g[Y[i]].push_back(X[i]);
  }
  for (int i = 0; i < Q; i++) {
    query[i] = Query(S[i], E[i], L[i], R[i]);
  }
  if (subtask3.need()) {
    subtask3.solve();
    return subtask3.ans;
  } else {
		return {};
	}
}

//int gen(int l, int r) {
	//long long int x = rnd();
	//x = abs(x);
	//return l + (x % (r - l + 1));
//}

//int pr[1000];
//int findp(int v);
//void unite(int u, int v);
//void not_line();

//signed main() {
	//while (1) {
		//int n = gen(2, 6);
		//vector <int> vec;
		//for (int i = 0; i < n; i++) {
			//vec.push_back(i);
		//}
		//shuffle(vec.begin(), vec.end(), rnd);
		//int NN, QQ;
		//NN = n, QQ = gen(1, 5);
		//vector <int> X(n - 1), Y(n - 1), S(QQ), E(QQ), L(QQ), R(QQ);
		//for (int i = 0; i < n; i++) {
			//if (i + 1 < n) {
				//X[i] = vec[i];
				//Y[i] = vec[i + 1];
			//}
		//}
		//for (int i = 0; i < QQ; i++) {
			//do {
				//S[i] = gen(0, NN - 1), E[i] = gen(0, NN - 1);
			//}
			//while (S[i] == E[i]);
			//L[i] = gen(0, NN - 1);
			//R[i] = gen(0, NN - 1);
		//}	
		//vector <int> ans = check_validity(NN, X, Y, S, E, L, R);
	//}
//}
///////////////////////////////////////////////

//int findp(int v) {
	//if (v == pr[v]) {
		//return v;
	//}
	//return pr[v] = findp(pr[v]);
//}
//void unite(int x, int y) {
	//x = findp(x);
	//y = findp(y);
	//if (x == y) {
		//return;
	//}
	//pr[x] = y;
//}
//void not_line() {
	//while (1) {
		//vector <vector<int>> put;
		//int NN = gen(1, 5);
		//int MM = gen(NN - 1, NN * (NN - 1) / 2);
		//int QQ = gen(1, 1);
		//vector<int> X(MM), Y(MM), S(QQ), E(QQ), L(QQ), R(QQ);
		//for (int i = 0; i < NN; i++) {
			//pr[i] = i;
		//}
		//set <pii> edges;
		//int xod = 0;
		//int cnt = 0;
		//while (cnt < NN - 1) {
			//int x = -1, y = -1;
			//while (x == y || findp(x) == findp(y)) {
				//x = gen(0, NN - 1);
				//y = gen(0, NN - 1);
			//}
			//unite(x, y);
			//X[xod] = x, Y[xod] = y;
			//edges.insert({x, y});
			//edges.insert({y, x});
			//xod++;
			//cnt++;
			//put.push_back({x, y});
		//}
		//for (int i = NN; i <= MM; i++) {
			//int x = -1, y = -1;
			//while (x == y || edges.find({x, y}) != edges.end() || edges.find({y, x}) != edges.end()) {
				//x = gen(0, NN - 1);
				//y = gen(0, NN - 1);
			//}
			//X[xod] = x;
			//Y[xod] = y;
			//edges.insert({x, y});
			//edges.insert({y, x});
			//put.push_back({x, y});
		//}
		//for (int i = 0; i < QQ; ++i) {
			//S[i] = gen(0, NN - 1);
			//do {
				//E[i] = gen(0, NN - 1);
			//} while (E[i] == S[i]);
			//L[i] = gen(0, NN - 1);
			//R[i] = gen(0, NN - 1);
			//put.push_back({S[i], E[i], L[i], R[i]});
		//}
		//vector<int> A = check_validity(NN, X, Y, S, E, L, R);
		//puts("finish");
	//}
//}


/*
4
0 2
2 1
1 3
*/

/*
5 4 1
2 0 
0 4
4 1
1 3
0 1 0 4

*/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51