oj.uz

Submission #683340

# Submission time Handle Problem Language Result Execution time Memory
683340 2023-01-18T08:08:25 Z vjudge1 Selotejp (COCI20_selotejp) C++17
110 / 110
 39 ms 468 KB 
#pragma GCC optimize ("O3")
#include <bits/stdc++.h>
#define pii pair<int, int>
#define piii pair<pii, int>
#define vi vector<int>
#define vvi vector<vi>
#define vpii vector<pii>
#define vvpii vector<vpii>
#define f first
#define s second
#define oo 1000000001
#define eb emplace_back
#define pb push_back
#define mpr make_pair
#define size(v) (int)v.size()
#define ln '\n'
#define ull unsigned long long
#define ll long long
#define all(v) v.begin(), v.end()

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void solve() {
  int n, m;
  cin >> n >> m;
  vector<string>cal(n);
  for (string &r : cal) {
    cin >> r;
  }

  // memory optimized version
  vvi dp(2, vi(1 << m, 0));
  fill(all(dp[1]), oo);

  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < m; ++j) {
      for (int p = 0; p < (1 << m); ++p) {
        if (cal[i][j] == '.') {
          dp[1][p] = min(dp[1][p], dp[0][p]);
          dp[1][p ^ (1 << j)] = min(dp[1][p ^ (1 << j)], dp[0][p]);
        } else {
          int h = (j && cal[i][j - 1] == '#' && (p & (1 << (j - 1)))) ? 0 : 1;
          int q = p | (1 << j);
          dp[1][q] = min(dp[1][q], dp[0][p] + h);
          int v = (i && cal[i - 1][j] == '#' && !(p & (1 << j))) ? 0 : 1;
          q ^= (1 << j);
          dp[1][q] = min(dp[1][q], dp[0][p] + v);
        }
      }
      dp[0] = dp[1];
      fill(all(dp[1]), oo);
    }
  }
  int res = (*min_element(all(dp[0])));
  cout << res << ln;
}
int main() {
  ios_base::sync_with_stdio(false);
  solve();
  return 0;
}

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 24 ms 340 KB Output is correct
3 Correct 6 ms 340 KB Output is correct
4 Correct 12 ms 340 KB Output is correct
5 Correct 27 ms 344 KB Output is correct
6 Correct 27 ms 340 KB Output is correct
7 Correct 26 ms 340 KB Output is correct
8 Correct 23 ms 468 KB Output is correct
9 Correct 27 ms 344 KB Output is correct
10 Correct 30 ms 364 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 24 ms 340 KB Output is correct
3 Correct 6 ms 340 KB Output is correct
4 Correct 12 ms 340 KB Output is correct
5 Correct 27 ms 344 KB Output is correct
6 Correct 27 ms 340 KB Output is correct
7 Correct 26 ms 340 KB Output is correct
8 Correct 23 ms 468 KB Output is correct
9 Correct 27 ms 344 KB Output is correct
10 Correct 30 ms 364 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 7 ms 340 KB Output is correct
21 Correct 16 ms 364 KB Output is correct
22 Correct 22 ms 360 KB Output is correct
23 Correct 24 ms 372 KB Output is correct
24 Correct 24 ms 340 KB Output is correct
25 Correct 30 ms 340 KB Output is correct
26 Correct 34 ms 356 KB Output is correct
27 Correct 35 ms 340 KB Output is correct
28 Correct 39 ms 340 KB Output is correct