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Submission #485429

# Submission time Handle Problem Language Result Execution time Memory
485429 2021-11-07T18:01:50 Z blue Collecting Mushrooms (NOI18_collectmushrooms) C++17
100 / 100
 16 ms 15020 KB 
#include <iostream>
#include <vector>
using namespace std;

using vi = vector<int>;
using vvi = vector<vi>;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int R, C, D, K;
    cin >> R >> C >> D >> K;

    string S[1+R];
    for(int i = 1; i <= R; i++)
    {
        cin >> S[i];
        S[i] = " " + S[i];
    }

    vvi delta(1+R+1, vi(1+C+1, 0));

    for(int i = 1; i <= R; i++)
    {
        for(int j = 1; j <= C; j++)
        {
            if(S[i][j] != 'S') continue;

            int i_lo = max(1, i - D);
            int j_lo = max(1, j - D);
            int i_hi = min(R, i + D);
            int j_hi = min(C, j + D);

            delta[i_lo][j_lo]++;
            delta[i_hi+1][j_hi+1]++;
            delta[i_lo][j_hi+1]--;
            delta[i_hi+1][j_lo]--;
        }
    }

    int ans = 0;

    vvi tot(1+R+1, vi(1+C+1, 0));
    for(int i = 1; i <= R; i++)
    {
        for(int j = 1; j <= C; j++)
        {
            tot[i][j] = tot[i][j-1] + tot[i-1][j] - tot[i-1][j-1] + delta[i][j];
            if(tot[i][j] >= K && S[i][j] == 'M') ans++;
        }
    }

    cout << ans << '\n';
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 312 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 316 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 332 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1996 KB Output is correct
2 Correct 3 ms 2372 KB Output is correct
3 Correct 4 ms 2764 KB Output is correct
4 Correct 3 ms 2380 KB Output is correct
5 Correct 3 ms 2508 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14544 KB Output is correct
2 Correct 10 ms 14928 KB Output is correct
3 Correct 10 ms 14928 KB Output is correct
4 Correct 13 ms 15020 KB Output is correct
5 Correct 11 ms 14928 KB Output is correct

Subtask #6
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 312 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 316 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 2 ms 1996 KB Output is correct
17 Correct 3 ms 2372 KB Output is correct
18 Correct 4 ms 2764 KB Output is correct
19 Correct 3 ms 2380 KB Output is correct
20 Correct 3 ms 2508 KB Output is correct
21 Correct 11 ms 14544 KB Output is correct
22 Correct 10 ms 14928 KB Output is correct
23 Correct 10 ms 14928 KB Output is correct
24 Correct 13 ms 15020 KB Output is correct
25 Correct 11 ms 14928 KB Output is correct
26 Correct 16 ms 8268 KB Output is correct
27 Correct 7 ms 5196 KB Output is correct
28 Correct 8 ms 5504 KB Output is correct
29 Correct 6 ms 5324 KB Output is correct
30 Correct 10 ms 7116 KB Output is correct