oj.uz

Submission #294813

# Submission time Handle Problem Language Result Execution time Memory
294813 2020-09-09T09:45:11 Z arman_ferdous Furniture (JOI20_furniture) C++17
100 / 100
 469 ms 6400 KB 
#include <bits/stdc++.h>
using namespace std;

// #define DEBUG
#define fi first
#define se second
#define pb push_back
#define sz(v) (int)v.size()
#define all(v) v.begin(),v.end()
#define dbg(x) cerr << #x << " is " << x << "\n";

using ll = long long;
using ii = pair<ll,ll>;

const int N = 1010;

int n, m;
int a[N][N];

bool ok(int r, int c) {
  if(a[r][c] != 0) return true;
  if(a[r + 1][c - 1] == 3 && a[r - 1][c + 1] == 2) return false;
  return true;
}

int dx[] = {-1, 0, 1, 1, 1, 0, -1, -1, -1};
int dy[] = {-1, -1, -1, 0, 1, 1, 1, 0, -1};

void add(int r, int c, int ty) {
  if(a[r][c] > 1) return;
  assert(ok(r, c));

  a[r][c] = ty;
  if(a[r - 1][c + 1] == 2 || ty == 2) {
    a[r][c] = 2;
    add(r - 1, c, 2);
    add(r, c + 1, 2);

    for(int k = 0; k < 5; k++) {
      int tx = r + dx[k], ty = c + dy[k];
      if(a[tx][ty] == 1) add(tx, ty, 2);
    }
  }
  else if(a[r + 1][c - 1] == 3 || ty == 3) {
    a[r][c] = 3;
    add(r, c - 1, 3);
    add(r + 1, c, 3);

    for(int k = 4; k < 9; k++) {
      int tx = r + dx[k], ty = c + dy[k];
      if(a[tx][ty] == 1) add(tx, ty, 3);
    }
  }
}

void show() {
#ifndef DEBUG
  return;
#endif
  cout << "-----\n";
  for(int i = 0; i <= n + 1; i++) {
    for(int j = 0; j <= m + 1; j++)
      cout << a[i][j] << " ";
    cout << endl;
  }
  cout << "-----\n";
}

int main() {
  scanf("%d %d", &n, &m);

  for(int i = 1; i <= n; i++) a[i][0] = 3, a[i][m + 1] = 2;
  for(int j = 1; j <= m; j++) a[0][j] = 2, a[n + 1][j] = 3;
  a[0][m + 1] = 2, a[n + 1][0] = 3;
  show();

  for(int i = 1; i <= n; i++) {
    for(int j = 1; j <= m; j++) {
      int x; scanf("%d", &x);
      if(x == 1) {
        add(i, j, 1);
      }
    }
  }
  show();
  int q; scanf("%d", &q);
  while(q--) {
    int r, c; scanf("%d %d", &r, &c);
    if(!ok(r, c)) puts("0");
    else {
      puts("1");
      add(r, c, 1);
    }
    show();
  }
  return 0;
}

Compilation message

furniture.cpp: In function 'int main()':
furniture.cpp:70:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   70 |   scanf("%d %d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~~
furniture.cpp:79:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   79 |       int x; scanf("%d", &x);
      |              ~~~~~^~~~~~~~~~
furniture.cpp:86:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   86 |   int q; scanf("%d", &q);
      |          ~~~~~^~~~~~~~~~
furniture.cpp:88:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   88 |     int r, c; scanf("%d %d", &r, &c);
      |               ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 2 ms 768 KB Output is correct
3 Correct 3 ms 640 KB Output is correct
4 Correct 4 ms 768 KB Output is correct
5 Correct 4 ms 768 KB Output is correct
6 Correct 5 ms 768 KB Output is correct
7 Correct 4 ms 768 KB Output is correct
8 Correct 4 ms 768 KB Output is correct
9 Correct 5 ms 768 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 2 ms 768 KB Output is correct
3 Correct 3 ms 640 KB Output is correct
4 Correct 4 ms 768 KB Output is correct
5 Correct 4 ms 768 KB Output is correct
6 Correct 5 ms 768 KB Output is correct
7 Correct 4 ms 768 KB Output is correct
8 Correct 4 ms 768 KB Output is correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 12 ms 640 KB Output is correct
11 Correct 3 ms 580 KB Output is correct
12 Correct 214 ms 4980 KB Output is correct
13 Correct 91 ms 4096 KB Output is correct
14 Correct 390 ms 5784 KB Output is correct
15 Correct 383 ms 5752 KB Output is correct
16 Correct 408 ms 6008 KB Output is correct
17 Correct 437 ms 6268 KB Output is correct
18 Correct 402 ms 6336 KB Output is correct
19 Correct 435 ms 6304 KB Output is correct
20 Correct 364 ms 6392 KB Output is correct
21 Correct 469 ms 6400 KB Output is correct