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Submission #961873

# Submission time Handle Problem Language Result Execution time Memory
961873 2024-04-12T15:35:41 Z garamlee500 Hacker (BOI15_hac) C++17
100 / 100
 180 ms 41760 KB 
#include <iostream>

using namespace std;
int nums[500000];
//int sums[500000];
// 0 to 8388606 for root/internal
// 8388607 + x for leaves
int sums[16777215];
int n, k;

int getItem(int i){
    return nums[i%n];
}
int query(int l, int r, int i = 0, int x = 0, int y =8388607){
    if (l==x&&y==r){
        return sums[i];
    }

    int result= 1000000001;
    int mid = (x+y+1)/2;
    if (l < mid){
        result = min (result, query(l, min(r, mid-1), 2*i+1, x, mid-1));
    }
    if (r >= mid){
        result = min(result, query(max(l, mid), r, 2*i+2, mid, y));
    }
    return result;
}


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> nums[i];
    }
    // Bytesar gets worst set of adjacent n/2 + n%2
    k = n/2 + n%2;
    sums[0+8388607]=0;
    // sums starting at i, up to i + k-1
    for (int i = 0; i < k; i++){
        sums[0+8388607] += nums[i];
    }
    for (int i = 1; i < n; i++){
        sums[i+8388607] = sums[i-1+8388607];
        sums[i+8388607] += getItem(i+k-1) - getItem(i-1);
        //cout << sums[i+8388607] << endl;
    }
    for (int i = 8388606; i>=0; i--){
        sums[i] = min(sums[2*i+1], sums[2*i+2]);
    }
    int best = 0;
    for (int i = 0; i < n; i++){
        // starts can be anywher from i-k+1, to i;
        int start = i-k+1;
        int last= i, minimum;
        if (start < 0){
            minimum = min(

                    query((start+n)%n, n-1),
                    query(0, last)

                    );
        }
        else{
            minimum = query(start, last);
        }
        best = max(best, minimum);
    }
    cout << best << '\n';
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 35356 KB Output is correct
2 Correct 13 ms 35420 KB Output is correct
3 Correct 12 ms 35408 KB Output is correct
4 Correct 13 ms 35420 KB Output is correct
5 Correct 11 ms 35572 KB Output is correct
6 Correct 12 ms 35420 KB Output is correct
7 Correct 11 ms 35420 KB Output is correct
8 Correct 13 ms 35420 KB Output is correct
9 Correct 12 ms 35532 KB Output is correct
10 Correct 11 ms 35416 KB Output is correct
11 Correct 11 ms 35420 KB Output is correct
12 Correct 12 ms 35420 KB Output is correct
13 Correct 11 ms 35420 KB Output is correct
14 Correct 14 ms 35420 KB Output is correct
15 Correct 11 ms 35388 KB Output is correct
16 Correct 13 ms 35420 KB Output is correct
17 Correct 12 ms 35408 KB Output is correct
18 Correct 11 ms 35420 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 35356 KB Output is correct
2 Correct 13 ms 35420 KB Output is correct
3 Correct 12 ms 35408 KB Output is correct
4 Correct 13 ms 35420 KB Output is correct
5 Correct 11 ms 35572 KB Output is correct
6 Correct 12 ms 35420 KB Output is correct
7 Correct 11 ms 35420 KB Output is correct
8 Correct 13 ms 35420 KB Output is correct
9 Correct 12 ms 35532 KB Output is correct
10 Correct 11 ms 35416 KB Output is correct
11 Correct 11 ms 35420 KB Output is correct
12 Correct 12 ms 35420 KB Output is correct
13 Correct 11 ms 35420 KB Output is correct
14 Correct 14 ms 35420 KB Output is correct
15 Correct 11 ms 35388 KB Output is correct
16 Correct 13 ms 35420 KB Output is correct
17 Correct 12 ms 35408 KB Output is correct
18 Correct 11 ms 35420 KB Output is correct
19 Correct 11 ms 35416 KB Output is correct
20 Correct 12 ms 35420 KB Output is correct
21 Correct 11 ms 35360 KB Output is correct
22 Correct 12 ms 35420 KB Output is correct
23 Correct 13 ms 35420 KB Output is correct
24 Correct 13 ms 35672 KB Output is correct
25 Correct 14 ms 35420 KB Output is correct
26 Correct 12 ms 35420 KB Output is correct
27 Correct 12 ms 35420 KB Output is correct
28 Correct 12 ms 35420 KB Output is correct
29 Correct 12 ms 35576 KB Output is correct
30 Correct 13 ms 35416 KB Output is correct
31 Correct 13 ms 35416 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 35420 KB Output is correct
2 Correct 12 ms 35416 KB Output is correct
3 Correct 13 ms 35604 KB Output is correct
4 Correct 38 ms 38096 KB Output is correct
5 Correct 71 ms 38748 KB Output is correct
6 Correct 88 ms 39496 KB Output is correct
7 Correct 113 ms 39748 KB Output is correct
8 Correct 168 ms 41532 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 35356 KB Output is correct
2 Correct 13 ms 35420 KB Output is correct
3 Correct 12 ms 35408 KB Output is correct
4 Correct 13 ms 35420 KB Output is correct
5 Correct 11 ms 35572 KB Output is correct
6 Correct 12 ms 35420 KB Output is correct
7 Correct 11 ms 35420 KB Output is correct
8 Correct 13 ms 35420 KB Output is correct
9 Correct 12 ms 35532 KB Output is correct
10 Correct 11 ms 35416 KB Output is correct
11 Correct 11 ms 35420 KB Output is correct
12 Correct 12 ms 35420 KB Output is correct
13 Correct 11 ms 35420 KB Output is correct
14 Correct 14 ms 35420 KB Output is correct
15 Correct 11 ms 35388 KB Output is correct
16 Correct 13 ms 35420 KB Output is correct
17 Correct 12 ms 35408 KB Output is correct
18 Correct 11 ms 35420 KB Output is correct
19 Correct 11 ms 35416 KB Output is correct
20 Correct 12 ms 35420 KB Output is correct
21 Correct 11 ms 35360 KB Output is correct
22 Correct 12 ms 35420 KB Output is correct
23 Correct 13 ms 35420 KB Output is correct
24 Correct 13 ms 35672 KB Output is correct
25 Correct 14 ms 35420 KB Output is correct
26 Correct 12 ms 35420 KB Output is correct
27 Correct 12 ms 35420 KB Output is correct
28 Correct 12 ms 35420 KB Output is correct
29 Correct 12 ms 35576 KB Output is correct
30 Correct 13 ms 35416 KB Output is correct
31 Correct 13 ms 35416 KB Output is correct
32 Correct 13 ms 35420 KB Output is correct
33 Correct 12 ms 35416 KB Output is correct
34 Correct 13 ms 35604 KB Output is correct
35 Correct 38 ms 38096 KB Output is correct
36 Correct 71 ms 38748 KB Output is correct
37 Correct 88 ms 39496 KB Output is correct
38 Correct 113 ms 39748 KB Output is correct
39 Correct 168 ms 41532 KB Output is correct
40 Correct 15 ms 35436 KB Output is correct
41 Correct 18 ms 35416 KB Output is correct
42 Correct 20 ms 35728 KB Output is correct
43 Correct 80 ms 39092 KB Output is correct
44 Correct 176 ms 41760 KB Output is correct
45 Correct 44 ms 37976 KB Output is correct
46 Correct 105 ms 39708 KB Output is correct
47 Correct 172 ms 41532 KB Output is correct
48 Correct 177 ms 41736 KB Output is correct
49 Correct 180 ms 40956 KB Output is correct
50 Correct 173 ms 40956 KB Output is correct