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답안 #1077277

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1077277 2024-08-27T04:31:52 Z YudoTLE Feast (NOI19_feast) C++17
12 / 100
 176 ms 11604 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;

const int INF = INT_MAX / 2;
const int MAXN = 3e5 + 5;

int n, k;
ll arr[MAXN], dp[MAXN][2];
int cnt[MAXN][2];
ll answer;

bool eval(ll c)
{
    dp[0][1] = -INF;
    for (int i = 1; i <= n; i++)
    {
        if (dp[i - 1][0] >= dp[i - 1][1])
        {
            dp[i][0] = dp[i - 1][0];
            cnt[i][0] = cnt[i - 1][0];
        }
        else
        {
            dp[i][0] = dp[i - 1][1];
            cnt[i][0] = cnt[i - 1][1];
        }
        if (dp[i - 1][0] - c >= dp[i - 1][1])
        {
            dp[i][1] = arr[i] + dp[i - 1][0] - c;
            cnt[i][1] = cnt[i - 1][0] + 1;
        }
        else
        {
            dp[i][1] = arr[i] + dp[i - 1][1];
            cnt[i][1] = cnt[i - 1][1];
        }
    }

    ll optv = LLONG_MIN;
    int optx = INT_MIN;
    for (int i = 0; i <= n; i++)
        for (int ii = 0; ii < 2; ii++)
    {
        ll nv = dp[i][ii] + c * cnt[i][ii];
        int nx = cnt[i][ii];
        if (nv > optv)
        {
            optv = nv;
            optx = nx;
        }
        if (nv == optv)
            optx = max(optx, nx);
    }
    if (optx <= k)
        answer = max(answer, optv);
    return optx <= k;
}

void solve()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++)
        cin >> arr[i];

    ll lo = 0, hi = INF;
    while (lo <= hi)
    {
        ll mi = lo + (hi - lo) / 2;
        if (eval(mi))
            hi = mi - 1;
        else
            lo = mi + 1;
    }

    cout << answer << '\n';
}

int main()
{
    // ios_base::sync_with_stdio(false), cin.tie(0);

    int t = 1;
    // cin >> t;
    while (t--) solve();

    return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 107 ms 11344 KB Output is correct
2 Correct 107 ms 11604 KB Output is correct
3 Correct 101 ms 11408 KB Output is correct
4 Correct 130 ms 11344 KB Output is correct
5 Correct 103 ms 11480 KB Output is correct
6 Correct 101 ms 11088 KB Output is correct
7 Correct 103 ms 11284 KB Output is correct
8 Correct 106 ms 11384 KB Output is correct
9 Correct 103 ms 11344 KB Output is correct
10 Correct 111 ms 11316 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 10528 KB Output is correct
2 Correct 70 ms 10472 KB Output is correct
3 Correct 65 ms 10324 KB Output is correct
4 Correct 71 ms 10428 KB Output is correct
5 Correct 101 ms 11072 KB Output is correct
6 Correct 62 ms 10320 KB Output is correct
7 Correct 67 ms 10580 KB Output is correct
8 Correct 104 ms 11600 KB Output is correct
9 Correct 106 ms 11268 KB Output is correct
10 Correct 68 ms 10268 KB Output is correct

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 176 ms 11604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 107 ms 11344 KB Output is correct
2 Correct 107 ms 11604 KB Output is correct
3 Correct 101 ms 11408 KB Output is correct
4 Correct 130 ms 11344 KB Output is correct
5 Correct 103 ms 11480 KB Output is correct
6 Correct 101 ms 11088 KB Output is correct
7 Correct 103 ms 11284 KB Output is correct
8 Correct 106 ms 11384 KB Output is correct
9 Correct 103 ms 11344 KB Output is correct
10 Correct 111 ms 11316 KB Output is correct
11 Correct 65 ms 10528 KB Output is correct
12 Correct 70 ms 10472 KB Output is correct
13 Correct 65 ms 10324 KB Output is correct
14 Correct 71 ms 10428 KB Output is correct
15 Correct 101 ms 11072 KB Output is correct
16 Correct 62 ms 10320 KB Output is correct
17 Correct 67 ms 10580 KB Output is correct
18 Correct 104 ms 11600 KB Output is correct
19 Correct 106 ms 11268 KB Output is correct
20 Correct 68 ms 10268 KB Output is correct
21 Incorrect 176 ms 11604 KB Output isn't correct
22 Halted 0 ms 0 KB -