oj.uz

답안 #667933

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
667933 2022-12-02T11:48:15 Z 600Mihnea 보물 찾기 (CEOI13_treasure2) C++17
100 / 100
 1 ms 468 KB 
#include "treasure.h"
#include <bits/stdc++.h>

using namespace std;

int ask(int r1, int c1, int r2, int c2)
{
  if (r1 > r2 || c1 > c2)
  {
    return 0;
  }
  return countTreasure(r1, c1, r2, c2);
}

const int N = 100 + 7;
int ul[N][N];
int ur[N][N];
int dl[N][N];
int dr[N][N];

void findTreasurePar(int n)
{
  int half = (n) / 2;
  for (int i = 1; i <= half; i++)
  {
    for (int j = 1; j <= half; j++)
    {
      dr[i][j] = ask(i, j, n, n); /// pe [1, half] and [1, half]
    }
  }
  for (int j = 1; j <= half; j++)
  {
    ur[n][j] = dr[1][j];
  }

  for (int i = half; i < n; i++)
  {
    for (int j = 1; j <= half; j++)
    {
      ur[i][j] = ask(1, j, i, n); /// pe [half + 1, n] and [1, half]
    }
  }


  for (int i = half; i <= n; i++)
  {
    for (int j = half; j < n; j++)
    {
      ul[i][j] = ask(1, 1, i, j); /// pe [half + 1, n] and [half + 1, n]
    }
  }
  for (int i = half; i <= n; i++)
  {
    ul[i][n] = ur[i][1];
  }

  for (int i = 2; i <= half; i++)
  {
    for (int j = half; j < n; j++)
    {
      dl[i][j] = ask(i, 1, n, j); /// pe [1, half] and [half + 1, n]
    }
  }

  for (int j = half; j < n; j++)
  {
    dl[1][j] = ul[n][j];
  }

  for (int i = 1; i <= half; i++)
  {
    dl[i][n] = dr[i][1];
  }

  for (int i = 1; i <= half; i++)
  {
    for (int j = 1; j < half; j++)
    {
      dl[i][j] = dl[i][n] - dr[i][j + 1];
    }
  }

  for (int i = half; i <= n; i++)
  {
    for (int j = 1; j < half; j++)
    {
      ul[i][j] = ul[i][n] - ur[i][j + 1];
    }
  }

  for (int i = 1; i <= half - 1; i++)
  {
    for (int j = 1; j <= n; j++)
    {
      ul[i][j] = ul[n][j] - dl[i + 1][j];
    }
  }


  for (int i = 1; i <= n; i++)
  {
    for (int  j = 1; j <= n; j++)
    {
      int val_ij = ul[i][j] - ul[i - 1][j] - ul[i][j - 1] + ul[i - 1][j - 1];
      if (val_ij)
      {
        Report(i, j);
      }
    }
  }
}

void findTreasure(int n)
{
  if (n % 2 == 0)
  {
    findTreasurePar(n);
    return;
  }
  int total = ask(1, 1, n, n);
  int half = (n) / 2 + 1;
  for (int i = 1; i <= half; i++)
  {
    for (int j = 1; j <= half; j++)
    {
      dr[i][j] = ask(i, j, n, n); /// pe [1, half] and [1, half]
    }
  }
  for (int j = 1; j <= half; j++)
  {
    ur[n][j] = dr[1][j];
  }

  for (int i = half; i < n; i++)
  {
    for (int j = 1; j <= half; j++)
    {
      ur[i][j] = ask(1, j, i, n); /// pe [half + 1, n] and [1, half]
    }
  }


  for (int i = half; i <= n; i++)
  {
    for (int j = half; j < n; j++)
    {
      ul[i][j] = ask(1, 1, i, j); /// pe [half + 1, n] and [half + 1, n]
    }
  }
  for (int i = half; i <= n; i++)
  {
    ul[i][n] = ur[i][1];
  }

  for (int i = 2; i <= half; i++)
  {
    for (int j = half; j < n; j++)
    {
      dl[i][j] = ask(i, 1, n, j); /// pe [1, half] and [half + 1, n]
    }
  }

  for (int j = half; j < n; j++)
  {
    dl[1][j] = ul[n][j];
  }

  for (int i = 1; i <= half; i++)
  {
    dl[i][n] = dr[i][1];
  }

  for (int i = 1; i <= half; i++)
  {
    for (int j = 1; j < half; j++)
    {
      dl[i][j] = dl[i][n] - dr[i][j + 1];
    }
  }

  for (int i = half; i <= n; i++)
  {
    for (int j = 1; j < half; j++)
    {
      ul[i][j] = ul[i][n] - ur[i][j + 1];
    }
  }

  for (int i = 1; i <= half - 1; i++)
  {
    for (int j = 1; j <= n; j++)
    {
      ul[i][j] = ul[n][j] - dl[i + 1][j];
    }
  }


  for (int i = 1; i <= n; i++)
  {
    for (int  j = 1; j <= n; j++)
    {
      int val_ij = ul[i][j] - ul[i - 1][j] - ul[i][j - 1] + ul[i - 1][j - 1];
      if (val_ij)
      {
        Report(i, j);
      }
    }
  }
}

Compilation message

treasure.cpp: In function 'void findTreasure(int)':
treasure.cpp:120:7: warning: unused variable 'total' [-Wunused-variable]
  120 |   int total = ask(1, 1, n, n);
      |       ^~~~~

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct - N = 5, K = 290, score = 10
2 Correct 1 ms 340 KB Output is correct - N = 10, K = 4475, score = 10
3 Correct 0 ms 340 KB Output is correct - N = 15, K = 22290, score = 10
4 Correct 0 ms 340 KB Output is correct - N = 16, K = 28928, score = 10
5 Correct 1 ms 340 KB Output is correct - N = 55, K = 4005290, score = 10
6 Correct 0 ms 340 KB Output is correct - N = 66, K = 8305803, score = 10
7 Correct 0 ms 340 KB Output is correct - N = 77, K = 15383162, score = 10
8 Correct 1 ms 468 KB Output is correct - N = 88, K = 26244416, score = 10
9 Correct 1 ms 468 KB Output is correct - N = 99, K = 42032202, score = 10
10 Correct 1 ms 468 KB Output is correct - N = 100, K = 43760000, score = 10