제출 #345166

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
345166		casperwang	열대 식물원 (Tropical Garden) (IOI11_garden)	C++14	0 / 100	1 ms	748 KiB

garden

#include "garden.h"
#include "gardenlib.h"
#include <bits/stdc++.h>
#define All(x) x.begin(), x.end()
#define pb emplace_back
#define pii pair<int,int>
#define ff first
#define ss second
using namespace std;
#define debug(args...) kout("[ " + string(#args) + " ]", args)
void kout() { cerr << endl; }
template <class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ',kout(b...); }
template <class T> void pary(T L, T R) { while (L != R) cerr << *L << " \n"[++L==R]; }

const int MAXN = 150000;
const int MAXQ = 2000;
const int L = 30;

void count_routes(int N, int M, int P, int R[MAXN][2], int Q, int G[MAXQ]) {
  vector <vector<int>> path(N), p(2*N);
  for (int i = 0; i < M; i++) {
    path[R[i][0]].pb(R[i][1]);
    path[R[i][1]].pb(R[i][0]);
  }
  vector <vector<int>> anc(2*N);
  for (int i = 0; i < N; i++) {
    anc[i].resize(L);
    anc[i+N].resize(L);
    int t = path[i][0];
    anc[i][0] = (path[t][0] == i && path[t].size() > 1) ? t+N : t;
    p[anc[i][0]].pb(i);
    if (path[i].size() > 1) {
      t = path[i][1];
      anc[i+N][0] = (path[t][0] == i && path[t].size() > 1) ? t+N : t;
      p[anc[i+N][0]].pb(i+N);
    } else anc[i+N][0] = i+N;
  }
  vector <int> vis1(2*N), vis2(2*N);
  queue <int> nxt;
  nxt.push(P);
  vis1[P] = 0;
  while (nxt.size()) {
    int now = nxt.front();
    nxt.pop();
    for (int i : p[now]) {
      if (!vis1[i]) {
        vis1[i] = vis1[now] + 1;
        nxt.push(i);
      }
    }
  }
  nxt.push(P+N);
  vis2[P+N] = 0;
  while (nxt.size()) {
    int now = nxt.front();
    nxt.pop();
    for (int i : p[now]) {
      if (!vis2[i]) {
        vis2[i] = vis2[now] + 1;
        nxt.push(i);
      }
    }
  }
  for (int i = 1; i < L; i++)
    for (int j = 0; j < 2*N; j++)
      anc[j][i] = anc[anc[j][i-1]][i-1];
  for (int q = 0; q < Q; q++) {
    int ans = 0;
    for (int i = 0; i < N; i++) {
      if (vis1[P] && (G[q] - vis1[i]) % vis1[P] == 0)
        ans++;
      else if (vis2[P+N] && (G[q] - vis2[i]) % vis2[P+N] == 0)
        ans++;
      else if (vis1[N+P]+vis2[P] && (G[q] - vis1[i]) % (vis2[P]+vis1[N+P]) == vis2[P])
        ans++;
      else if (vis1[N+P]+vis2[P] && (G[q] - vis2[i]) % (vis2[P]+vis1[N+P]) == vis1[N+P])
        ans++;
    }
    answer(ans);
  }
  return;
}

• Subtask 1: 0 / 49
• Subtask 2: 0 / 20
• Subtask 3: 0 / 31