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Submission #1017658

# Submission time Handle Problem Language Result Execution time Memory
1017658 2024-07-09T09:22:30 Z vjudge1 Feast (NOI19_feast) C++14
4 / 100
 94 ms 12120 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ld long double
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (ll)(1000000007)

signed main() {
    ios_base::sync_with_stdio(0);cin.tie(0);

    int n, k;
    cin >> n >> k;

    vector<int> A(n + 1);
    for (int i = 1; i <= n; i++) {
        cin >> A[i];
    }
    int l = 0, r = 1e18, res = 0;
    while (l <= r) {
        int md = (l + r) / 2;

        vector<array<array<int, 2>, 2>> dp(n + 1);
        dp[0][1][0] = -md, dp[0][1][1] = 1;
        for (int i = 1; i <= n; i++) {
            if (dp[i - 1][0][0] - md + A[i] > dp[i][1][0]) {
                dp[i][1][0] = dp[i - 1][0][0] - md + A[i];
                dp[i][1][1] = dp[i - 1][0][1] + 1;
            }
            if (dp[i - 1][1][0] + A[i] > dp[i][1][0]) {
                dp[i][1][0] = dp[i - 1][1][0] + A[i];
                dp[i][1][1] = dp[i - 1][1][1];
            }
            if (dp[i - 1][0][0] > dp[i][0][0]) {
                dp[i][0][0] = dp[i - 1][0][0];
                dp[i][0][1] = dp[i - 1][0][1];
            }
            if (dp[i - 1][1][0] > dp[i][0][0]) {
                dp[i][0][0] = dp[i - 1][1][0];
                dp[i][0][1] = dp[i - 1][1][1];
            }
        }

        if (dp.back()[0][0] < dp.back()[1][0]) {
            swap(dp.back()[0], dp.back()[1]);
        }

        if (dp.back()[0][1] <= k) {
            r = md - 1, res = max(res, dp.back()[0][0] + md * dp.back()[0][1]);
        }
        else if (dp.back()[0][1] > k){
            l = md + 1;
        }

    }
    cout << res;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 11732 KB Output is correct
2 Correct 83 ms 12000 KB Output is correct
3 Correct 81 ms 12120 KB Output is correct
4 Correct 80 ms 12028 KB Output is correct
5 Correct 86 ms 12004 KB Output is correct
6 Correct 94 ms 11724 KB Output is correct
7 Correct 90 ms 11736 KB Output is correct
8 Correct 82 ms 12064 KB Output is correct
9 Correct 78 ms 11868 KB Output is correct
10 Correct 83 ms 11876 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 72 ms 12120 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 90 ms 11856 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 11732 KB Output is correct
2 Correct 83 ms 12000 KB Output is correct
3 Correct 81 ms 12120 KB Output is correct
4 Correct 80 ms 12028 KB Output is correct
5 Correct 86 ms 12004 KB Output is correct
6 Correct 94 ms 11724 KB Output is correct
7 Correct 90 ms 11736 KB Output is correct
8 Correct 82 ms 12064 KB Output is correct
9 Correct 78 ms 11868 KB Output is correct
10 Correct 83 ms 11876 KB Output is correct
11 Incorrect 72 ms 12120 KB Output isn't correct
12 Halted 0 ms 0 KB -