oj.uz

Submission #854555

# Submission time Handle Problem Language Result Execution time Memory
854555 2023-09-28T03:58:29 Z NeroZein The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 2323 ms 56096 KB 
#include "bits/stdc++.h"
using namespace std;

#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, m;
  cin >> n >> m;
  int mx = 0; 
  vector<vector<int>> a(n, vector<int> (m)); 
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < m; ++j) {
      cin >> a[i][j];
      mx = max(mx, a[i][j]); 
    }
  }
  auto check = [&](int mid) {
    int la = m - 1;
    int min_val = mx - mid; 
    vector<vector<bool>> region(n, vector<bool> (m)); 
    for (int i = 0; i < n; ++i) {
      for (int j = 0; j <= la; ++j) {//coli <= coli-1
        if (a[i][j] < min_val) {
          la = j - 1;
          break; 
        }
        region[i][j] = 1;
      }
    }
    vector<int> bmx(2), bmn(2, 1e9); 
    for (int i = 0; i < n; ++i) {
      for (int j = 0; j < m; ++j) {
        bmx[region[i][j]] = max(bmx[region[i][j]], a[i][j]);
        bmn[region[i][j]] = min(bmn[region[i][j]], a[i][j]);
      }
    }
    return max(bmx[0] - bmn[0], bmx[1] - bmn[1]) <= mid; 
  };
  auto solve = [&]() {
    int l = 0, r = 1e9;
    while (l < r) {
      int mid = (l + r) >> 1;
      if (check(mid)) {
        r = mid;
      } else {
        l = mid + 1; 
      }
    }
    return l; 
  };
  auto flip_rows = [&]() {
    for (int i = 0; i < n / 2; ++i) {
      for (int j = 0; j < m; ++j) {
        swap(a[i][j], a[n - i - 1][j]); 
      }
    }
  }; 
  auto flip_cols = [&]() {
    for (int i = 0; i < n; ++i) {
      for (int j = 0; j < m / 2; ++j) {
        swap(a[i][j], a[i][m - j - 1]); 
      }
    }
  };
  int ans = solve(); //0, 0
  flip_cols();
  ans = min(ans, solve()); //0, 1
  flip_rows();
  ans = min(ans, solve()); //1, 1
  flip_cols();
  ans = min(ans, solve());//1, 0
  cout << ans << '\n'; 
  return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 456 KB Output is correct
8 Correct 0 ms 600 KB Output is correct
9 Correct 0 ms 456 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 456 KB Output is correct
8 Correct 0 ms 600 KB Output is correct
9 Correct 0 ms 456 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 25 ms 604 KB Output is correct
17 Correct 25 ms 860 KB Output is correct
18 Correct 25 ms 856 KB Output is correct
19 Correct 25 ms 1112 KB Output is correct
20 Correct 22 ms 600 KB Output is correct
21 Correct 23 ms 856 KB Output is correct
22 Correct 23 ms 860 KB Output is correct
23 Correct 22 ms 860 KB Output is correct
24 Correct 20 ms 940 KB Output is correct
25 Correct 23 ms 860 KB Output is correct
26 Correct 23 ms 860 KB Output is correct
27 Correct 23 ms 860 KB Output is correct
28 Correct 23 ms 1028 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 456 KB Output is correct
8 Correct 0 ms 600 KB Output is correct
9 Correct 0 ms 456 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 25 ms 604 KB Output is correct
17 Correct 25 ms 860 KB Output is correct
18 Correct 25 ms 856 KB Output is correct
19 Correct 25 ms 1112 KB Output is correct
20 Correct 22 ms 600 KB Output is correct
21 Correct 23 ms 856 KB Output is correct
22 Correct 23 ms 860 KB Output is correct
23 Correct 22 ms 860 KB Output is correct
24 Correct 20 ms 940 KB Output is correct
25 Correct 23 ms 860 KB Output is correct
26 Correct 23 ms 860 KB Output is correct
27 Correct 23 ms 860 KB Output is correct
28 Correct 23 ms 1028 KB Output is correct
29 Correct 2192 ms 38412 KB Output is correct
30 Correct 2136 ms 37336 KB Output is correct
31 Correct 2321 ms 40428 KB Output is correct
32 Correct 2323 ms 40212 KB Output is correct
33 Correct 1988 ms 34756 KB Output is correct
34 Correct 2285 ms 40264 KB Output is correct
35 Correct 2094 ms 55812 KB Output is correct
36 Correct 1776 ms 48592 KB Output is correct
37 Correct 2076 ms 56096 KB Output is correct