oj.uz

Submission #862441

# Submission time Handle Problem Language Result Execution time Memory
862441 2023-10-18T08:44:32 Z Irate Collecting Mushrooms (NOI18_collectmushrooms) C++14
100 / 100
 39 ms 33136 KB 
#include<bits/stdc++.h>
using namespace std;
struct Fenwick{
    vector<int>BIT;
    int sz;
    void Update(int pos, int val){
        while(pos <= sz){
            BIT[pos] += val;
            pos += (pos & -pos);
        }
    }
    int Query(int pos){
        int sum = 0;
        while(pos > 0){
            sum += BIT[pos];
            pos -= (pos & -pos);
        }
        return sum;
    }
};  
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m, d, k;
    cin >> n >> m >> d >> k;
    vector<vector<char>>grid(n + 1, vector<char>(m + 1));
    Fenwick tree[m + 1];
    for(int i = 0;i <= m;++i){
        tree[i].BIT.resize(n + 1);
        tree[i].sz = n;
    }
    for(int i = 1;i <= n;++i){
        for(int j = 1;j <= m;++j){
            cin >> grid[i][j];
            if(grid[i][j] == 'S'){
                int x = max(i - d, 1);
                int y = max(j - d, 1);
                int x_end = min(i + d, n);
                int y_end = min(j + d, m);
                tree[y].Update(x, 1);
                if(x_end + 1 <= n)tree[y].Update(x_end + 1, -1);
                if(y_end + 1 <= m){
                    tree[y_end + 1].Update(x, -1);
                    if(x_end + 1 <= n)tree[y_end + 1].Update(x_end + 1, 1);
                }
            }
        }
    }
    int res = 0;
    for(int i = 1;i <= n;++i){
        int sum = 0;
        for(int j = 1;j <= m;++j){
            sum += tree[j].Query(i);
            if(grid[i][j] == 'M' && sum >= k){
                res++;
            }
        }
    }
    cout << res;
}

Subtask #1
9.0 / 9.0

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

Subtask #2
10.0 / 10.0

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

Subtask #3
18.0 / 18.0

# 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 348 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1624 KB Output is correct
2 Correct 4 ms 1488 KB Output is correct
3 Correct 5 ms 1884 KB Output is correct
4 Correct 4 ms 1628 KB Output is correct
5 Correct 6 ms 2096 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 33128 KB Output is correct
2 Correct 35 ms 33124 KB Output is correct
3 Correct 37 ms 33060 KB Output is correct
4 Correct 39 ms 33128 KB Output is correct
5 Correct 38 ms 33136 KB Output is correct

Subtask #6
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 4 ms 1624 KB Output is correct
17 Correct 4 ms 1488 KB Output is correct
18 Correct 5 ms 1884 KB Output is correct
19 Correct 4 ms 1628 KB Output is correct
20 Correct 6 ms 2096 KB Output is correct
21 Correct 37 ms 33128 KB Output is correct
22 Correct 35 ms 33124 KB Output is correct
23 Correct 37 ms 33060 KB Output is correct
24 Correct 39 ms 33128 KB Output is correct
25 Correct 38 ms 33136 KB Output is correct
26 Correct 13 ms 4236 KB Output is correct
27 Correct 11 ms 3420 KB Output is correct
28 Correct 11 ms 4140 KB Output is correct
29 Correct 10 ms 3852 KB Output is correct
30 Correct 11 ms 3932 KB Output is correct