Submission #632684

#	Time	Username	Problem	Language	Result	Execution time	Memory
632684		MojoLake	죄수들의 도전 (IOI22_prison)	C++17	38 / 100	18 ms	1568 KiB

prison

#include <iostream>
#include <vector>


using namespace std;

int max_dig = 12;
int x = 38;


int compare(int i , int j){

  bool prev_on = i % 3 == 1 ? 0 : 1;

  int d = i / 3;
  int prev_d = d - 1;

  int prev_pos = max_dig - prev_d;
  int cur_pos = max_dig - d;

  bool cur_on = j & (1<<prev_pos);

  int a = d % 2 == 0;


  if(prev_on != cur_on){
    return ((prev_on && a) || (!prev_on && !a)) ? -1 : -2;
  }

  if(cur_pos == 0){
    return (((j & 1) && a) || (!(j & 1) && !a)) ? -2 : -1;  
  }

  bool now_on = j & (1<<cur_pos);

  return 3 * (d + 1) + (now_on ? 2 : 1);

}

vector<vector<int>> devise_strategy(int n){

  vector<vector<int>> ret(x + 1, vector<int>(n+1));

  for(int i = 0; i <= x; ++i){
    for(int j = 0; j <= n; ++j){

      if(j == 0){
        ret[i][j] = (i/3)%2;
        continue;
      }

      if(i == 0){
        
        bool on = j & (1<<max_dig);
        ret[i][j] = 3 + (on ? 2 : 1);
        continue;
      }

      ret[i][j] = min(x, compare(i, j));
 
    }
  }

  ret[0][0] = 0;

  return ret;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 28 / 90