Submission #1163018

#	Time	Username	Problem	Language	Result	Execution time	Memory
1163018		HappyCapybara	Tropical Garden (IOI11_garden)	C++20	69 / 100	5094 ms	47356 KiB

garden

#include "garden.h"
#include "gardenlib.h"
#include<bits/stdc++.h>
using namespace std;

void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){
  vector<vector<int>> mb(2, vector<int>(N, -1));
  for (int i=0; i<M; i++){
    if (mb[0][R[i][0]] == -1) mb[0][R[i][0]] = i;
    else if (mb[1][R[i][0]] == -1) mb[1][R[i][0]] = i;
    if (mb[0][R[i][1]] == -1) mb[0][R[i][1]] = i;
    else if (mb[1][R[i][1]] == -1) mb[1][R[i][1]] = i;
  }
  for (int i=0; i<N; i++){
    if (mb[1][i] == -1) mb[1][i] = mb[0][i];
  }
  vector<vector<int>> bl(2*N, vector<int>(30));
  for (int i=0; i<2*N; i++){
    int next = R[mb[i%2][i/2]][0]+R[mb[i%2][i/2]][1]-i/2;
    bl[i][0] = 2*next+(mb[i%2][i/2] == mb[0][next]);
  }
  for (int j=1; j<30; j++){
    for (int i=0; i<2*N; i++) bl[i][j] = bl[bl[i][j-1]][j-1];
  }
  for (int i=0; i<Q; i++){
    int res = 0;
    for (int k=0; k<N; k++){
      int cur = 2*k;
      for (int j=29; j>=0; j--){
        if (G[i] & (1<<j)) cur = bl[cur][j];
      }
      if (cur/2 == P) res++;
    }
    answer(res);
  }
}

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