Submission #296132

#	Time	Username	Problem	Language	Result	Execution time	Memory
296132		Tangent	Werewolf (IOI18_werewolf)	C++17	49 / 100	511 ms	37880 KiB

werewolf

#include <bits/stdc++.h>
#include "werewolf.h"

using namespace std;

//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
// typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
// find_by_order(), order_of_key()

typedef long long ll;
typedef long double dd;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<dd, dd> pdd;
typedef vector<int> vii;
typedef vector<ll> vll;
typedef vector<dd> vdd;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<pdd> vpdd;
typedef vector<vii> vvii;
typedef vector<vll> vvll;
typedef vector<vdd> vvdd;
typedef vector<vpii> vvpii;
typedef vector<vpll> vvpll;
typedef vector<vpdd> vvpdd;
typedef vector<bool> vb;

const int inf = 1 << 30;

#define rep(i, n) for (ll i = 0; i < n; i++)
#define ffor(i, a, b) for(ll i = a; i < b; i++)
#define forin(x, a) for (auto &x: a)
#define all(x) x.begin(), x.end()

#ifdef TEST
#define dbg(x) cout << #x << ": " << x << '\n';
#define dbgc(x) cout << #x << ":"; forin(a, x) { cout << " " << a; } cout << endl;
#define tassert(x) assert(x);
#else
#define dbg(x)
#define dbgc(x)
#define tassert(x)
#endif

void buildmin(vii &t, int v, int tl, int tr, vii &chain) {
  if (tl == tr) {
    t[v] = chain[tl];
  } else {
    int tm = (tl + tr) / 2;
    buildmin(t, v << 1, tl, tm, chain);
    buildmin(t, v << 1 | 1, tm + 1, tr, chain);
    t[v] = min(t[v << 1], t[v << 1 | 1]);
  }
}

void buildmax(vii &t, int v, int tl, int tr, vii &chain) {
  if (tl == tr) {
    t[v] = chain[tl];
  } else {
    int tm = (tl + tr) / 2;
    buildmax(t, v << 1, tl, tm, chain);
    buildmax(t, v << 1 | 1, tm + 1, tr, chain);
    t[v] = max(t[v << 1], t[v << 1 | 1]);
  }
}

int queryminr(vii &t, int v, int tl, int tr, int start, int limit) {
  if (tl > tr) {
    return start;
  }
  if (t[v] >= limit) {
    return tr;
  }
  if (tl == tr) {
    return start;
  }
  int tm = (tl + tr) / 2;
  if (start > tm) {
    return queryminr(t, v << 1 | 1, tm + 1, tr, start, limit);
  }
  int res = queryminr(t, v << 1, tl, tm, start, limit);
  if (res == tm) {
    return queryminr(t, v << 1 | 1, tm + 1, tr, res, limit);
  } else {
    return res;
  }
}

int querymaxr(vii &t, int v, int tl, int tr, int start, int limit) {
  if (tl > tr) {
    return start;
  }
  if (t[v] <= limit) {
    return tr;
  }
  if (tl == tr) {
    return start;
  }
  int tm = (tl + tr) / 2;
  if (start > tm) {
    return querymaxr(t, v << 1 | 1, tm + 1, tr, start, limit);
  }
  int res = querymaxr(t, v << 1, tl, tm, start, limit);
  if (res == tm) {
    return querymaxr(t, v << 1 | 1, tm + 1, tr, res, limit);
  } else {
    return res;
  }
}

int queryminl(vii &t, int v, int tl, int tr, int start, int limit) {
  if (tl > tr) {
    return start;
  }
  if (t[v] >= limit) {
    return tl;
  }
  if (tl == tr) {
    return start;
  }
  int tm = (tl + tr) / 2;
  if (start <= tm) {
    return queryminl(t, v << 1, tl, tm, start, limit);
  }
  int res = queryminl(t, v << 1 | 1, tm + 1, tr, start, limit);
  if (res == tm + 1) {
    return queryminl(t, v << 1, tl, tm, res, limit);
  } else {
    return res;
  }
}

int querymaxl(vii &t, int v, int tl, int tr, int start, int limit) {
  if (tl > tr) {
    return start;
  }
  if (t[v] <= limit) {
    return tl;
  }
  if (tl == tr) {
    return start;
  }
  int tm = (tl + tr) / 2;
  if (start <= tm) {
    return querymaxl(t, v << 1, tl, tm, start, limit);
  }
  int res = querymaxl(t, v << 1 | 1, tm + 1, tr, start, limit);
  if (res == tm + 1) {
    return querymaxl(t, v << 1, tl, tm, res, limit);
  } else {
    return res;
  }
}

std::vector<int> check_validity(int N, std::vector<int> X, std::vector<int> Y,
                                std::vector<int> S, std::vector<int> E,
                                std::vector<int> L, std::vector<int> R) {
  int Q = S.size();
  int M = X.size();
  if (N <= 3000) {
      vvii adj(N);
      rep(i, M) {
        adj[X[i]].emplace_back(Y[i]);
        adj[Y[i]].emplace_back(X[i]);
      }
      vii res(Q);
      rep(i, Q) {
        vb vis(N);
        deque<int> q1, q2;
        q1.emplace_back(S[i]);
        while (!q1.empty()) {
            int u = q1.front();
            q1.pop_front();
            if (vis[u]) {
                continue;
            }
            vis[u] = true;
            if (u <= R[i]) {
                q2.emplace_back(u);
            }
            forin(v, adj[u]) {
                if (!vis[v] && v >= L[i]) {
                    q1.emplace_back(v);
                }
            }
        }
        vis.assign(N, false);
        while (!q2.empty() && !vis[E[i]]) {
            int u = q2.front();
            q2.pop_front();
            if (vis[u]) {
                continue;
            }
            vis[u] = true;
            forin(v, adj[u]) {
                if (!vis[v] && v <= R[i]) {
                    q2.emplace_back(v);
                }
            }
        }
      res[i] = vis[E[i]];
      }
    return res;
  }
  vii tmax(4 * N), tmin(4 * N);
  vii chain(N), lookup(N);
  vvii adj(N);
  rep(i, M) {
    adj[X[i]].emplace_back(Y[i]);
    adj[Y[i]].emplace_back(X[i]);
  }
  int start = -1;
  rep(i, N) {
      if (adj[i].size() == 1) {
        start = i;
        break;
      }
  }
  chain[0] = start;
  lookup[start] = 0;
  rep(i, N - 1) {
      if (i == 0 || adj[chain[i]][0] != chain[i - 1]) {
        chain[i + 1] = adj[chain[i]][0];
        lookup[adj[chain[i]][0]] = i + 1;
      } else {
        chain[i + 1] = adj[chain[i]][1];
        lookup[adj[chain[i]][1]] = i + 1;
      }
  }
  tassert(adj[chain.back()].size() == 1);

  buildmin(tmin, 1, 0, N - 1, chain);
  buildmax(tmax, 1, 0, N - 1, chain);

  vii res(Q);
  rep(i, Q) {
    int ss = lookup[S[i]], ee = lookup[E[i]];
    if (ss < ee) {
      res[i] = queryminr(tmin, 1, 0, N - 1, ss, L[i]) >= querymaxl(tmax, 1,0, N - 1, ee, R[i]);
    } else {
      res[i] = querymaxr(tmax, 1, 0, N - 1, ee, R[i]) >= queryminl(tmin, 1,0, N - 1, ss, L[i]);
    }
  }
  return res;
}

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