제출 #1198738

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1198738		tab1540	Feast (NOI19_feast)	C++20	100 / 100	98 ms	11000 KiB

feast

#include <iostream>

using namespace std;

int arr[300009];
int n, k;

pair<long long, int> dp[300009][2];

pair<long long, int> gaymen(long long pen) {
    for (int i = 1; i <= n; i++) {
        dp[i][0] = max(dp[i - 1][0], dp[i - 1][1]);

        dp[i][1] = max(
            make_pair(dp[i - 1][1].first + arr[i], dp[i - 1][1].second),
            // max(
                make_pair(dp[i - 1][0].first + arr[i] - pen, dp[i - 1][0].second + 1)
                // make_pair(dp[i - 1][1].first + arr[i] - pen, dp[i - 1][1].second + 1)
            // )
        );
    }
    return max(
        dp[n][1],
        dp[n][0]
    );
}

long long r = 1;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    dp[0][1].first = -(1ll << 60);
    cin >> n >> k;

    for (int i = 1;  i<= n; i++) {
        cin >> arr[i];
        r += abs(arr[i]);
    } 


    long long l = 0;

    while (l < r) {
        long long mid = (l + r + 1) >> 1;

        if (gaymen(mid).second >= k) {
            l = mid;
        } else {
            r = mid - 1;
        }
    }

    cout << gaymen(l).first + l * k;

    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 18 / 18
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11
• Subtask 6: 20 / 20
• Subtask 7: 29 / 29