oj.uz

Submission #649581

# Submission time Handle Problem Language Result Execution time Memory
649581 2022-10-10T19:24:48 Z ZaZo_ Collecting Mushrooms (NOI18_collectmushrooms) C++14
100 / 100
 44 ms 13496 KB 
#include <bits/stdc++.h>
#define int long long
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define fast ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define mesh !
using namespace std;
const int N = 10 , MOD = 1e9+7 , INF = 1e12;
const double EPS=1e-10, PI=3.141592653589793238462643383279502;
vector<char>cur;

int32_t main()
{
    //freopen("abc.in", "r", stdin);
    //fast;

    /*
    brainzeftstorming
    - law 3mlt BS momken ya5od n^2 momken ygeeb awel 4 subtasks momkeeen
    - el fekra bta3et cses lma kona bn3ml +1 w -1 w n3ml pref sum b3dha -
    - momken n3mel 2d pref sum 3la kol 'S' n3lem el square el heya hta5do b enna n3mel enter b 1 w exit b -1
    - tab ma n3mel 2d pref sum bas 3la 'S' 3shan n3raf fe kam 'S' fe el range lol
    */

    int r , c , d , k;
    cin >> r >> c >> d >> k ;

    char grid[r+1][c+1] ; int pref[r+2][c+2];
    for(int i = 0 ; i <= r+1 ; i ++)  for(int j = 0 ; j <= c+1 ; j ++) pref[i][j]=0;
    for(int i = 1 ; i <= r ; i ++)
      for(int j = 1 ; j <= c ; j ++)
        {
          cin >> grid[i][j];
          if(grid[i][j]=='S') pref[i][j]++;
        }

    //n3mel 2d prefsum 3shan nzbat el ranges
    for(int i = 1 ; i <= r+1 ; i ++)
    {
      for(int j = 1 ; j <= c+1 ; j ++)
      {
        pref[i][j] = pref[i][j] + pref[i-1][j] + pref[i][j-1] - pref[i-1][j-1];
      }
    }

    //m7tagen n3raf l kol 'M' el square range el heya feeh fe kam S

    int ans=0;
    for(int i = 1 ; i <= r ; i ++)
    {
      for(int j = 1 ; j <= c ; j ++)
      {
        if(grid[i][j]!='M') continue;
        int top = max(1ll , i-d);
        int left = max(1ll , j-d);
        int right = min(c , j+d);
        int bottom = min(r , i+d);
        int cur = pref[bottom][right] - pref[top-1][right] - pref[bottom][left-1] + pref[top-1][left-1];
        ans+=(cur>=k);
      }
    }
    cout<<ans<<endl;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 2132 KB Output is correct
2 Correct 14 ms 2296 KB Output is correct
3 Correct 18 ms 2748 KB Output is correct
4 Correct 14 ms 2260 KB Output is correct
5 Correct 15 ms 2360 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 13480 KB Output is correct
2 Correct 40 ms 13372 KB Output is correct
3 Correct 39 ms 13448 KB Output is correct
4 Correct 40 ms 13496 KB Output is correct
5 Correct 44 ms 13484 KB Output is correct

Subtask #6
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 14 ms 2132 KB Output is correct
17 Correct 14 ms 2296 KB Output is correct
18 Correct 18 ms 2748 KB Output is correct
19 Correct 14 ms 2260 KB Output is correct
20 Correct 15 ms 2360 KB Output is correct
21 Correct 42 ms 13480 KB Output is correct
22 Correct 40 ms 13372 KB Output is correct
23 Correct 39 ms 13448 KB Output is correct
24 Correct 40 ms 13496 KB Output is correct
25 Correct 44 ms 13484 KB Output is correct
26 Correct 36 ms 5332 KB Output is correct
27 Correct 34 ms 5096 KB Output is correct
28 Correct 32 ms 5204 KB Output is correct
29 Correct 33 ms 5324 KB Output is correct
30 Correct 36 ms 5324 KB Output is correct