Submission #293665

#	Time	Username	Problem	Language	Result	Execution time	Memory
293665		BThero	Cultivation (JOI17_cultivation)	C++17	5 / 100	1535 ms	384 KiB

cultivation

// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << " = " << x << endl;

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

int cnt[45][45];
pii arr[305];
int n, R, C;

void solve() {
  scanf("%d %d", &R, &C);
  scanf("%d", &n);
  
  for (int i = 1; i <= n; ++i) {
    scanf("%d %d", &arr[i].fi, &arr[i].se);
  }
  
  int ans = R + C;
  
  for (int ax = 0; ax <= R; ++ax) {
    for (int bx = 0; ax + bx <= R; ++bx) {
      for (int ay = 0; ay <= C; ++ay) {
        for (int by = 0; ay + by <= C; ++by) {
          int cur = ax + bx + ay + by;
          
          if (cur >= ans) {
            continue;
          }
        
          for (int i = 1; i <= n; ++i) {
            int x1 = max(1, arr[i].fi - ax);
            int x2 = min(R, arr[i].fi + bx);
            int y1 = max(1, arr[i].se - ay);
            int y2 = min(C, arr[i].se + by);
            cnt[x1][y1]++;
            cnt[x2 + 1][y1]--;
            cnt[x1][y2 + 1]--;
            cnt[x2 + 1][y2 + 1]++;
          }
          
          bool ok = 1;
          
          for (int x = 1; x <= R; ++x) {
            for (int y = 1; y <= C; ++y) {
              cnt[x][y] += cnt[x - 1][y];
              cnt[x][y] += cnt[x][y - 1];
              cnt[x][y] -= cnt[x - 1][y - 1];
              ok &= (cnt[x][y] > 0);
            }
          }
          
          for (int x = 1; x <= R; ++x) {
            for (int y = 1; y <= C; ++y) {
              cnt[x][y] = 0;
            }
          } 
          
          if (ok) {
            ans = cur;
          }
        }
      }
    }
  }
  
  printf("%d\n", ans);
}

int main() {
  int tt = 1;
  
  while (tt--) {
    solve();
  }

  return 0;
}

Compilation message (stderr)

cultivation.cpp: In function 'void solve()':
cultivation.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 |   scanf("%d %d", &R, &C);
      |   ~~~~~^~~~~~~~~~~~~~~~~
cultivation.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
cultivation.cpp:26:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |     scanf("%d %d", &arr[i].fi, &arr[i].se);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20
• Subtask 6: 0 / 20