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Submission #1113201

# Submission time Handle Problem Language Result Execution time Memory
1113201 2024-11-16T03:43:49 Z HiepVu217 Feast (NOI19_feast) C++17
100 / 100
 115 ms 10324 KB 
#include <bits/stdc++.h>
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#define int long long
using namespace std;
const int N = 3e5 + 17;
int n, k;
long long a[N];
pair <long long, int> f[N], m;
pair <int, int> calc(int c)
{
    pair <int, int> m = {0, 0};
    f[0] = {0, 0};

    for (int i=1; i<=n; i++)
    {
        f[i]=f[i-1];
        if (m.first + a[i] - c > f[i].first || (m.first + a[i] - c == f[i].first && m.second + 1 < f[i].second))
        {
            f[i].first = m.first + a[i]-c;
            f[i].second = m.second + 1;
        }
        if (f[i].first - a[i] > m.first || (f[i].first - a[i] == m.first && f[i].second < m.second))
        {
            m.first = f[i].first - a[i];
            m.second = f[i].second;
        }
    }

    return f[n];
}
int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> k;
    for (int i = 1; i <= n; ++i)
    {
        cin >> a[i];
        a[i] += a[i - 1];
    }
    long long l = 1, r = 3e14;
    while (l < r)
    {
        long long mid = l + r + 1 >> 1;
        m = calc (mid);
        if (m.second >= k)
        {
            l = mid;
            continue;
        }
        r = mid - 1;
    }
    m = calc(l);
    long long ans = l * m.second + m.first;
    cout << ans;
}

Compilation message

feast.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
feast.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
feast.cpp: In function 'int32_t main()':
feast.cpp:46:31: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |         long long mid = l + r + 1 >> 1;
      |                         ~~~~~~^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 7248 KB Output is correct
2 Correct 56 ms 9696 KB Output is correct
3 Correct 50 ms 7484 KB Output is correct
4 Correct 58 ms 7244 KB Output is correct
5 Correct 50 ms 7200 KB Output is correct
6 Correct 56 ms 7252 KB Output is correct
7 Correct 46 ms 8520 KB Output is correct
8 Correct 45 ms 7240 KB Output is correct
9 Correct 48 ms 9276 KB Output is correct
10 Correct 51 ms 7628 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 7248 KB Output is correct
2 Correct 36 ms 7248 KB Output is correct
3 Correct 44 ms 7248 KB Output is correct
4 Correct 40 ms 7248 KB Output is correct
5 Correct 46 ms 7248 KB Output is correct
6 Correct 39 ms 7168 KB Output is correct
7 Correct 45 ms 8484 KB Output is correct
8 Correct 47 ms 7248 KB Output is correct
9 Correct 47 ms 7248 KB Output is correct
10 Correct 40 ms 7248 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 7240 KB Output is correct
2 Correct 62 ms 7248 KB Output is correct
3 Correct 63 ms 7316 KB Output is correct
4 Correct 64 ms 7332 KB Output is correct
5 Correct 64 ms 7248 KB Output is correct
6 Correct 65 ms 7284 KB Output is correct
7 Correct 65 ms 7240 KB Output is correct
8 Correct 64 ms 7240 KB Output is correct
9 Correct 69 ms 7244 KB Output is correct
10 Correct 73 ms 7332 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 508 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 2 ms 508 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 2 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 7248 KB Output is correct
2 Correct 56 ms 9696 KB Output is correct
3 Correct 50 ms 7484 KB Output is correct
4 Correct 58 ms 7244 KB Output is correct
5 Correct 50 ms 7200 KB Output is correct
6 Correct 56 ms 7252 KB Output is correct
7 Correct 46 ms 8520 KB Output is correct
8 Correct 45 ms 7240 KB Output is correct
9 Correct 48 ms 9276 KB Output is correct
10 Correct 51 ms 7628 KB Output is correct
11 Correct 37 ms 7248 KB Output is correct
12 Correct 36 ms 7248 KB Output is correct
13 Correct 44 ms 7248 KB Output is correct
14 Correct 40 ms 7248 KB Output is correct
15 Correct 46 ms 7248 KB Output is correct
16 Correct 39 ms 7168 KB Output is correct
17 Correct 45 ms 8484 KB Output is correct
18 Correct 47 ms 7248 KB Output is correct
19 Correct 47 ms 7248 KB Output is correct
20 Correct 40 ms 7248 KB Output is correct
21 Correct 65 ms 7240 KB Output is correct
22 Correct 62 ms 7248 KB Output is correct
23 Correct 63 ms 7316 KB Output is correct
24 Correct 64 ms 7332 KB Output is correct
25 Correct 64 ms 7248 KB Output is correct
26 Correct 65 ms 7284 KB Output is correct
27 Correct 65 ms 7240 KB Output is correct
28 Correct 64 ms 7240 KB Output is correct
29 Correct 69 ms 7244 KB Output is correct
30 Correct 73 ms 7332 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 1 ms 336 KB Output is correct
37 Correct 1 ms 336 KB Output is correct
38 Correct 1 ms 336 KB Output is correct
39 Correct 1 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 1 ms 336 KB Output is correct
43 Correct 1 ms 336 KB Output is correct
44 Correct 1 ms 336 KB Output is correct
45 Correct 1 ms 336 KB Output is correct
46 Correct 1 ms 336 KB Output is correct
47 Correct 1 ms 336 KB Output is correct
48 Correct 1 ms 336 KB Output is correct
49 Correct 1 ms 336 KB Output is correct
50 Correct 1 ms 336 KB Output is correct
51 Correct 1 ms 508 KB Output is correct
52 Correct 1 ms 336 KB Output is correct
53 Correct 2 ms 508 KB Output is correct
54 Correct 1 ms 336 KB Output is correct
55 Correct 1 ms 336 KB Output is correct
56 Correct 2 ms 336 KB Output is correct
57 Correct 1 ms 336 KB Output is correct
58 Correct 1 ms 336 KB Output is correct
59 Correct 1 ms 336 KB Output is correct
60 Correct 1 ms 336 KB Output is correct
61 Correct 108 ms 9032 KB Output is correct
62 Correct 98 ms 7504 KB Output is correct
63 Correct 77 ms 7248 KB Output is correct
64 Correct 115 ms 8676 KB Output is correct
65 Correct 106 ms 9032 KB Output is correct
66 Correct 106 ms 10324 KB Output is correct
67 Correct 106 ms 10192 KB Output is correct
68 Correct 69 ms 9032 KB Output is correct
69 Correct 63 ms 9800 KB Output is correct
70 Correct 61 ms 9800 KB Output is correct