Submission #580512

#	Time	Username	Problem	Language	Result	Execution time	Memory
580512		Vanilla	Werewolf (IOI18_werewolf)	C++17	15 / 100	257 ms	19668 KiB

werewolf

#include <bits/stdc++.h>
#include "werewolf.h"
using namespace std;
const int maxn = 3e3 + 2;
vector <int> ad [maxn];
bitset <maxn> vis1, vis2;

void dfs1 (int u, int l, int r) {
  vis1[u] = 1;
  for (int v: ad[u]) {
    if (v < l || vis1[v]) continue;
    dfs1(v, l, r);
  }
}

int dfs2 (int u, int l, int r) {
  vis2[u] = 1;
  bool b = (vis1[u] && u >= l && u <= r);
  for (int v: ad[u]) {
    if (v > r || vis2[v]) continue;
    b|=dfs2(v, l, r);
  }
  return b;  
}

vector<int> check_validity(int N, vector<int> X, vector<int> Y,
                                vector<int> S, vector<int> E,
                                vector<int> L, vector<int> R) {
  for (int i = 0; i < X.size(); i++){
    ad[X[i]].push_back(Y[i]);
    ad[Y[i]].push_back(X[i]);
  }
  int Q = S.size();
  vector<int> A(Q);
  for (int i = 0; i < Q; ++i) {
    vis1 = vis2 = 0;
    dfs1(S[i], L[i], R[i]);
    A[i] = dfs2(E[i], L[i], R[i]);
  }
  return A;
}

Compilation message (stderr)

werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:29:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   for (int i = 0; i < X.size(); i++){
      |                   ~~^~~~~~~~~~

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