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Submission #654647

# Submission time Handle Problem Language Result Execution time Memory
654647 2022-11-01T04:59:54 Z horiseun Collecting Mushrooms (NOI18_collectmushrooms) C++11
100 / 100
 28 ms 31400 KB 
#include <iostream>
#include <tuple>
#include <vector>
using namespace std;

#define f first
#define s second

int r, c, d, k, ans, spr, r1, r2, c1, c2;
vector<pair<int, int>> mushrooms;

int main() {

    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> r >> c >> d >> k;
    vector<vector<int>> grid(r + 5, vector<int> (c + 5, 0));
    vector<vector<int>> pref(r + 5, vector<int> (c + 5, 0));
    for (int i = 1; i <= r; i++) {
        for (int j = 1; j <= c; j++) {
            char x; cin >> x;
            if (x == 'M') {
                mushrooms.push_back({i, j});
            } else if (x == 'S') {
                grid[i][j] = 1;
            }
        }
    }

    for (int i = 1; i <= r; i++) {
        for (int j = 1; j <= c; j++) {
            pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + grid[i][j];
        }
    }

    for (pair<int, int> p : mushrooms) {
        r1 = (p.f + d >= r ? r : p.f + d);
        c1 = (p.s + d >= c ? c : p.s + d);
        r2 = (p.f - d - 1 >= 0 ? p.f - d - 1 : 0);
        c2 = (p.s - d - 1 >= 0 ? p.s - d - 1 : 0); 
        spr = pref[r1][c1] - pref[r1][c2] - pref[r2][c1] + pref[r2][c2];
        if (spr >= k) ans++;
    }
    
    cout << ans << "\n";
    

}

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 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 320 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 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 584 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 452 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2132 KB Output is correct
2 Correct 5 ms 2132 KB Output is correct
3 Correct 5 ms 2516 KB Output is correct
4 Correct 5 ms 2124 KB Output is correct
5 Correct 5 ms 2260 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 28572 KB Output is correct
2 Correct 28 ms 31308 KB Output is correct
3 Correct 27 ms 31396 KB Output is correct
4 Correct 26 ms 28836 KB Output is correct
5 Correct 26 ms 31400 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 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 1 ms 584 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 4 ms 2132 KB Output is correct
17 Correct 5 ms 2132 KB Output is correct
18 Correct 5 ms 2516 KB Output is correct
19 Correct 5 ms 2124 KB Output is correct
20 Correct 5 ms 2260 KB Output is correct
21 Correct 28 ms 28572 KB Output is correct
22 Correct 28 ms 31308 KB Output is correct
23 Correct 27 ms 31396 KB Output is correct
24 Correct 26 ms 28836 KB Output is correct
25 Correct 26 ms 31400 KB Output is correct
26 Correct 16 ms 8276 KB Output is correct
27 Correct 15 ms 6852 KB Output is correct
28 Correct 16 ms 6220 KB Output is correct
29 Correct 15 ms 6244 KB Output is correct
30 Correct 18 ms 8688 KB Output is correct