oj.uz

답안 #237739

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
237739 2020-06-08T14:30:23 Z Haunted_Cpp Feast (NOI19_feast) C++17
30 / 100
 72 ms 14444 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 3e5 + 5;

vector<long long> arr (N);
vector<long long> comp;
vector< vector<long long> > g (N);
bool is_rem [N];

template<typename T>
struct Kadane {
  long long best;
  long long cur;
  int s, start, end;
  Kadane (const vector<T> &a) {
    best = cur = s = start = end = 0LL;
    for (int i = 0; i < (int) a.size(); i++) {
      cur += a[i];
      if (cur < 0) {
        cur = 0;
        s = i + 1;
      }
      if (cur > best) {
        best = cur;
        start = s;
        end = i + 1;
      }
    }
  }
};

int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  for (int i = 0; i < n; i++) cin >> arr[i];
  for (int i = 0; i < n; i++) {
    if (comp.empty() || ( (arr[i] >= 0)  ^ (comp.back() >= 0) ) == true ) {
      comp.emplace_back(arr[i]);
      continue;
    }
    long long cur = arr[i];
    while (!comp.empty() && ( (arr[i] >= 0)  ^ (comp.back() >= 0) ) == false ) {
      cur += comp.back();
      comp.pop_back();
    }
    comp.emplace_back(cur);
  }
  int tot = 0;
  for (int i = 0; i < (int) comp.size() ; i++) if (comp[i] > 0) ++tot;
  if (tot <= k) {
    long long s = 0;
    for (auto to : comp) s += (to >= 0 ? to : 0);
    cout << s << '\n';
    return 0;
  }
  int primeiro = -1;
  int ultimo = -1;
  for (int i = 0; i < (int) comp.size(); i++) {
    if (comp[i] > 0) {
      if (primeiro == -1) primeiro = i;
      else ultimo = i + 1;
    }
  }
  vector<int> neg;
  for (int i = primeiro; i < ultimo; i++) {
    if (comp[i] < 0) {
      neg.emplace_back(i);
    }
  }
  sort (neg.begin(), neg.end(), [&] (int x, int y) {
    return comp[x] < comp[y];
  });
  int blocos = 1;
  for (auto to : neg) {
    if (blocos < k) {
      ++blocos;
      is_rem[to] = true;
    }
  }
  assert (blocos == k);
  int idx = 0;
  for (int i = primeiro; i < ultimo; i++) {
    if (is_rem[i]) {
      ++idx;
      continue;
    }
    g[idx].emplace_back(comp[i]);
  }
  long long res = 0;
  for (auto vec : g) {
    if (!vec.empty()) {
      Kadane <long long> solve (vec); 
      res += solve.best;
    }
  }
  cout << res << '\n';
  return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 9728 KB Output is correct
2 Correct 55 ms 9848 KB Output is correct
3 Correct 52 ms 9788 KB Output is correct
4 Correct 51 ms 9728 KB Output is correct
5 Correct 50 ms 9728 KB Output is correct
6 Correct 51 ms 9792 KB Output is correct
7 Correct 51 ms 9728 KB Output is correct
8 Correct 52 ms 9728 KB Output is correct
9 Correct 53 ms 9728 KB Output is correct
10 Correct 51 ms 9728 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 9728 KB Output is correct
2 Correct 35 ms 9728 KB Output is correct
3 Correct 33 ms 9728 KB Output is correct
4 Correct 33 ms 9728 KB Output is correct
5 Correct 56 ms 9652 KB Output is correct
6 Correct 34 ms 9728 KB Output is correct
7 Correct 33 ms 9728 KB Output is correct
8 Correct 52 ms 9848 KB Output is correct
9 Correct 49 ms 9728 KB Output is correct
10 Correct 36 ms 9728 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 69 ms 14384 KB Output is correct
2 Correct 68 ms 14444 KB Output is correct
3 Correct 69 ms 14444 KB Output is correct
4 Correct 72 ms 14316 KB Output is correct
5 Correct 72 ms 14384 KB Output is correct
6 Correct 67 ms 14444 KB Output is correct
7 Correct 70 ms 14444 KB Output is correct
8 Correct 69 ms 14444 KB Output is correct
9 Correct 70 ms 14444 KB Output is correct
10 Correct 71 ms 14444 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9728 KB Output is correct
2 Correct 10 ms 9728 KB Output is correct
3 Incorrect 11 ms 9728 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9728 KB Output is correct
2 Correct 10 ms 9728 KB Output is correct
3 Incorrect 11 ms 9728 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9728 KB Output is correct
2 Correct 10 ms 9728 KB Output is correct
3 Incorrect 11 ms 9728 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 9728 KB Output is correct
2 Correct 55 ms 9848 KB Output is correct
3 Correct 52 ms 9788 KB Output is correct
4 Correct 51 ms 9728 KB Output is correct
5 Correct 50 ms 9728 KB Output is correct
6 Correct 51 ms 9792 KB Output is correct
7 Correct 51 ms 9728 KB Output is correct
8 Correct 52 ms 9728 KB Output is correct
9 Correct 53 ms 9728 KB Output is correct
10 Correct 51 ms 9728 KB Output is correct
11 Correct 33 ms 9728 KB Output is correct
12 Correct 35 ms 9728 KB Output is correct
13 Correct 33 ms 9728 KB Output is correct
14 Correct 33 ms 9728 KB Output is correct
15 Correct 56 ms 9652 KB Output is correct
16 Correct 34 ms 9728 KB Output is correct
17 Correct 33 ms 9728 KB Output is correct
18 Correct 52 ms 9848 KB Output is correct
19 Correct 49 ms 9728 KB Output is correct
20 Correct 36 ms 9728 KB Output is correct
21 Correct 69 ms 14384 KB Output is correct
22 Correct 68 ms 14444 KB Output is correct
23 Correct 69 ms 14444 KB Output is correct
24 Correct 72 ms 14316 KB Output is correct
25 Correct 72 ms 14384 KB Output is correct
26 Correct 67 ms 14444 KB Output is correct
27 Correct 70 ms 14444 KB Output is correct
28 Correct 69 ms 14444 KB Output is correct
29 Correct 70 ms 14444 KB Output is correct
30 Correct 71 ms 14444 KB Output is correct
31 Correct 11 ms 9728 KB Output is correct
32 Correct 10 ms 9728 KB Output is correct
33 Incorrect 11 ms 9728 KB Output isn't correct
34 Halted 0 ms 0 KB -