oj.uz

Submission #335080

# Submission time Handle Problem Language Result Execution time Memory
335080 2020-12-11T05:26:36 Z VROOM_VARUN K blocks (IZhO14_blocks) C++14
53 / 100
 1000 ms 48952 KB 
/*
ID: varunra2
LANG: C++
TASK: kblocks
*/

#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
  cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif

#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e9
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second

const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions

int n, k;

int curk = 0;
const int MAXN = 1e5 + 2;
const int K = 18;
const int MAXK = 102;
int vals[MAXN];
int lft[MAXN];
int lg2[MAXN + 1];
int st[MAXN][K + 1];
int dp[MAXK][MAXN] = {};

void init() {
  lg2[1] = 0;
  for (int i = 2; i <= MAXN; i++) lg2[i] = lg2[i / 2] + 1;
}

void calc(int ind) {
  for (int i = 0; i < n; i++) st[i][0] = dp[ind][i];

  for (int j = 1; j <= K; j++)
    for (int i = 0; i + (1 << j) <= n; i++)
      st[i][j] = min(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
}

int qry(int L, int R) {
  int j = lg2[R - L + 1];
  return min(st[L][j], st[R - (1 << j) + 1][j]);
}

// can we do dnc opt :eyes:
// oops we can't :sadge:
// we can solve using segment tree, but im worried it will tle
// rmq it is lmao

int main() {
  // #ifndef ONLINE_JUDGE
  // freopen("kblocks.in", "r", stdin);
  // freopen("kblocks.out", "w", stdout);
  // #endif
  cin.sync_with_stdio(0);
  cin.tie(0);

  cin >> n >> k;

  init();

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

  rep(i, 0, MAXK) rep(j, 0, MAXN) dp[i][j] = INF;

  dp[0][0] = 0;
  calc(0);

  stack<int> st;
  vals[0] = INF;
  st.push(0);

  for (int i = 1; i <= n; i++) {
    while (!st.empty() and vals[st.top()] <= vals[i]) st.pop();
    if (st.empty())
      lft[i] = -1;
    else
      lft[i] = st.top();
    st.push(i);
  }

  for (int i = 1; i <= k; i++) {
    for (int j = 1; j <= n; j++) {
      dp[i][j] = min(qry(lft[j], j - 1) + vals[j], dp[i][lft[j]]);
    }
    calc(i);
  }

  cout << dp[k][n] << '\n';

  return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 40684 KB Output is correct
2 Correct 25 ms 40684 KB Output is correct
3 Correct 26 ms 40684 KB Output is correct
4 Correct 26 ms 40684 KB Output is correct
5 Correct 25 ms 40684 KB Output is correct
6 Correct 25 ms 40684 KB Output is correct
7 Correct 26 ms 40684 KB Output is correct
8 Correct 26 ms 40684 KB Output is correct
9 Correct 26 ms 40684 KB Output is correct
10 Correct 30 ms 40684 KB Output is correct
11 Correct 28 ms 40684 KB Output is correct
12 Correct 32 ms 40684 KB Output is correct
13 Correct 30 ms 40684 KB Output is correct
14 Correct 26 ms 40684 KB Output is correct
15 Correct 26 ms 40684 KB Output is correct
16 Correct 26 ms 40684 KB Output is correct
17 Correct 26 ms 40700 KB Output is correct
18 Correct 27 ms 40684 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 40684 KB Output is correct
2 Correct 26 ms 40684 KB Output is correct
3 Correct 27 ms 40684 KB Output is correct
4 Correct 26 ms 40832 KB Output is correct
5 Correct 27 ms 40684 KB Output is correct
6 Correct 26 ms 40684 KB Output is correct
7 Correct 29 ms 40684 KB Output is correct
8 Correct 26 ms 40684 KB Output is correct
9 Correct 26 ms 40684 KB Output is correct
10 Correct 31 ms 40684 KB Output is correct
11 Correct 31 ms 40812 KB Output is correct
12 Correct 27 ms 40684 KB Output is correct
13 Correct 25 ms 40684 KB Output is correct
14 Correct 27 ms 40684 KB Output is correct
15 Correct 26 ms 40684 KB Output is correct
16 Correct 26 ms 40684 KB Output is correct
17 Correct 27 ms 40684 KB Output is correct
18 Correct 26 ms 40812 KB Output is correct
19 Correct 26 ms 40684 KB Output is correct
20 Correct 26 ms 40684 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 40684 KB Output is correct
2 Correct 25 ms 40684 KB Output is correct
3 Correct 26 ms 40684 KB Output is correct
4 Correct 26 ms 40684 KB Output is correct
5 Correct 25 ms 40684 KB Output is correct
6 Correct 25 ms 40684 KB Output is correct
7 Correct 26 ms 40684 KB Output is correct
8 Correct 26 ms 40684 KB Output is correct
9 Correct 26 ms 40684 KB Output is correct
10 Correct 30 ms 40684 KB Output is correct
11 Correct 28 ms 40684 KB Output is correct
12 Correct 32 ms 40684 KB Output is correct
13 Correct 30 ms 40684 KB Output is correct
14 Correct 26 ms 40684 KB Output is correct
15 Correct 26 ms 40684 KB Output is correct
16 Correct 26 ms 40684 KB Output is correct
17 Correct 26 ms 40700 KB Output is correct
18 Correct 27 ms 40684 KB Output is correct
19 Correct 25 ms 40684 KB Output is correct
20 Correct 26 ms 40684 KB Output is correct
21 Correct 27 ms 40684 KB Output is correct
22 Correct 26 ms 40832 KB Output is correct
23 Correct 27 ms 40684 KB Output is correct
24 Correct 26 ms 40684 KB Output is correct
25 Correct 29 ms 40684 KB Output is correct
26 Correct 26 ms 40684 KB Output is correct
27 Correct 26 ms 40684 KB Output is correct
28 Correct 31 ms 40684 KB Output is correct
29 Correct 31 ms 40812 KB Output is correct
30 Correct 27 ms 40684 KB Output is correct
31 Correct 25 ms 40684 KB Output is correct
32 Correct 27 ms 40684 KB Output is correct
33 Correct 26 ms 40684 KB Output is correct
34 Correct 26 ms 40684 KB Output is correct
35 Correct 27 ms 40684 KB Output is correct
36 Correct 26 ms 40812 KB Output is correct
37 Correct 26 ms 40684 KB Output is correct
38 Correct 26 ms 40684 KB Output is correct
39 Correct 26 ms 40684 KB Output is correct
40 Correct 25 ms 40684 KB Output is correct
41 Correct 25 ms 40684 KB Output is correct
42 Correct 25 ms 40684 KB Output is correct
43 Correct 28 ms 40684 KB Output is correct
44 Correct 31 ms 40684 KB Output is correct
45 Correct 25 ms 40684 KB Output is correct
46 Correct 25 ms 40684 KB Output is correct
47 Correct 26 ms 40704 KB Output is correct
48 Correct 26 ms 40684 KB Output is correct
49 Correct 26 ms 40684 KB Output is correct
50 Correct 25 ms 40684 KB Output is correct
51 Correct 25 ms 40684 KB Output is correct
52 Correct 25 ms 40684 KB Output is correct
53 Correct 26 ms 40684 KB Output is correct
54 Correct 26 ms 40684 KB Output is correct
55 Correct 26 ms 40684 KB Output is correct
56 Correct 26 ms 40684 KB Output is correct
57 Correct 26 ms 40556 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 40684 KB Output is correct
2 Correct 25 ms 40684 KB Output is correct
3 Correct 26 ms 40684 KB Output is correct
4 Correct 26 ms 40684 KB Output is correct
5 Correct 25 ms 40684 KB Output is correct
6 Correct 25 ms 40684 KB Output is correct
7 Correct 26 ms 40684 KB Output is correct
8 Correct 26 ms 40684 KB Output is correct
9 Correct 26 ms 40684 KB Output is correct
10 Correct 30 ms 40684 KB Output is correct
11 Correct 28 ms 40684 KB Output is correct
12 Correct 32 ms 40684 KB Output is correct
13 Correct 30 ms 40684 KB Output is correct
14 Correct 26 ms 40684 KB Output is correct
15 Correct 26 ms 40684 KB Output is correct
16 Correct 26 ms 40684 KB Output is correct
17 Correct 26 ms 40700 KB Output is correct
18 Correct 27 ms 40684 KB Output is correct
19 Correct 25 ms 40684 KB Output is correct
20 Correct 26 ms 40684 KB Output is correct
21 Correct 27 ms 40684 KB Output is correct
22 Correct 26 ms 40832 KB Output is correct
23 Correct 27 ms 40684 KB Output is correct
24 Correct 26 ms 40684 KB Output is correct
25 Correct 29 ms 40684 KB Output is correct
26 Correct 26 ms 40684 KB Output is correct
27 Correct 26 ms 40684 KB Output is correct
28 Correct 31 ms 40684 KB Output is correct
29 Correct 31 ms 40812 KB Output is correct
30 Correct 27 ms 40684 KB Output is correct
31 Correct 25 ms 40684 KB Output is correct
32 Correct 27 ms 40684 KB Output is correct
33 Correct 26 ms 40684 KB Output is correct
34 Correct 26 ms 40684 KB Output is correct
35 Correct 27 ms 40684 KB Output is correct
36 Correct 26 ms 40812 KB Output is correct
37 Correct 26 ms 40684 KB Output is correct
38 Correct 26 ms 40684 KB Output is correct
39 Correct 26 ms 40684 KB Output is correct
40 Correct 25 ms 40684 KB Output is correct
41 Correct 25 ms 40684 KB Output is correct
42 Correct 25 ms 40684 KB Output is correct
43 Correct 28 ms 40684 KB Output is correct
44 Correct 31 ms 40684 KB Output is correct
45 Correct 25 ms 40684 KB Output is correct
46 Correct 25 ms 40684 KB Output is correct
47 Correct 26 ms 40704 KB Output is correct
48 Correct 26 ms 40684 KB Output is correct
49 Correct 26 ms 40684 KB Output is correct
50 Correct 25 ms 40684 KB Output is correct
51 Correct 25 ms 40684 KB Output is correct
52 Correct 25 ms 40684 KB Output is correct
53 Correct 26 ms 40684 KB Output is correct
54 Correct 26 ms 40684 KB Output is correct
55 Correct 26 ms 40684 KB Output is correct
56 Correct 26 ms 40684 KB Output is correct
57 Correct 26 ms 40556 KB Output is correct
58 Correct 33 ms 41452 KB Output is correct
59 Correct 33 ms 44268 KB Output is correct
60 Correct 45 ms 44396 KB Output is correct
61 Correct 168 ms 44504 KB Output is correct
62 Execution timed out 1037 ms 48952 KB Time limit exceeded
63 Halted 0 ms 0 KB -