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Submission #851521

# Submission time Handle Problem Language Result Execution time Memory
851521 2023-09-20T03:36:25 Z NeroZein Bigger segments (IZhO19_segments) C++17
100 / 100
 153 ms 21180 KB 
#include "bits/stdc++.h"
using namespace std;

const int N = 5e5 + 5;

int a[N];
int dp[N]; 
long long pref[N]; 

long long seg[N * 2];

void upd(int nd, int l, int r, int p, long long v) {
  if (l == r) {
    seg[nd] = v;
    return;
  }
  int mid = (l + r) >> 1;
  int rs = nd + ((mid - l + 1) << 1);
  if (p <= mid) {
    upd(nd + 1, l, mid, p, v);
  } else {
    upd(rs, mid + 1, r, p, v); 
  }
  seg[nd] = min(seg[nd + 1], seg[rs]); 
}

int get(int nd, int l, int r, int s, int e, long long v) {
  if (l > e || r < s || seg[nd] > v) {
    return -1; 
  }
  if (l == r) {
    return l;
  }
  int mid = (l + r) >> 1;
  int rs = nd + ((mid - l + 1) << 1);
  int ret = get(rs, mid + 1, r, s, e, v);
  if (ret == -1) {
    ret = get(nd + 1, l, mid, s, e, v);
  }
  return ret;
}

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  fill(seg, seg + N * 2, 1e18);
  upd(0, 0, N, 0, 0); 
  int n;
  cin >> n;
  for (int i = 1; i <= n; ++i) {
    cin >> a[i];
    pref[i] = pref[i - 1] + a[i]; 
  }
  dp[1] = 1;
  upd(0, 0, N, 1, a[1] * 2); 
  for (int i = 2; i <= n; ++i) {
    int j = get(0, 0, N, 0, i - 1, pref[i]); 
    dp[i] = dp[j] + 1;
    long long sum = pref[i] - pref[j];
    upd(0, 0, N, i, sum + pref[i]); 
  }
  cout << dp[n] << '\n';
  return 0;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12888 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12888 KB Output is correct
5 Correct 3 ms 12888 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12888 KB Output is correct
9 Correct 2 ms 12888 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12912 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12892 KB Output is correct
14 Correct 2 ms 12892 KB Output is correct
15 Correct 2 ms 12892 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12888 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12888 KB Output is correct
5 Correct 3 ms 12888 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12888 KB Output is correct
9 Correct 2 ms 12888 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12912 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12892 KB Output is correct
14 Correct 2 ms 12892 KB Output is correct
15 Correct 2 ms 12892 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 2 ms 12892 KB Output is correct
18 Correct 2 ms 12892 KB Output is correct
19 Correct 2 ms 12892 KB Output is correct
20 Correct 2 ms 12892 KB Output is correct
21 Correct 2 ms 12892 KB Output is correct
22 Correct 2 ms 12892 KB Output is correct
23 Correct 2 ms 12928 KB Output is correct
24 Correct 2 ms 12892 KB Output is correct
25 Correct 2 ms 12892 KB Output is correct
26 Correct 2 ms 12888 KB Output is correct
27 Correct 2 ms 12892 KB Output is correct
28 Correct 2 ms 12892 KB Output is correct
29 Correct 3 ms 12892 KB Output is correct
30 Correct 2 ms 12892 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12888 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12888 KB Output is correct
5 Correct 3 ms 12888 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12888 KB Output is correct
9 Correct 2 ms 12888 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12912 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12892 KB Output is correct
14 Correct 2 ms 12892 KB Output is correct
15 Correct 2 ms 12892 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 2 ms 12892 KB Output is correct
18 Correct 2 ms 12892 KB Output is correct
19 Correct 2 ms 12892 KB Output is correct
20 Correct 2 ms 12892 KB Output is correct
21 Correct 2 ms 12892 KB Output is correct
22 Correct 2 ms 12892 KB Output is correct
23 Correct 2 ms 12928 KB Output is correct
24 Correct 2 ms 12892 KB Output is correct
25 Correct 2 ms 12892 KB Output is correct
26 Correct 2 ms 12888 KB Output is correct
27 Correct 2 ms 12892 KB Output is correct
28 Correct 2 ms 12892 KB Output is correct
29 Correct 3 ms 12892 KB Output is correct
30 Correct 2 ms 12892 KB Output is correct
31 Correct 3 ms 12892 KB Output is correct
32 Correct 3 ms 12892 KB Output is correct
33 Correct 3 ms 12892 KB Output is correct
34 Correct 3 ms 12892 KB Output is correct
35 Correct 3 ms 12892 KB Output is correct
36 Correct 3 ms 12892 KB Output is correct
37 Correct 2 ms 12892 KB Output is correct
38 Correct 3 ms 12892 KB Output is correct
39 Correct 3 ms 12888 KB Output is correct
40 Correct 3 ms 12908 KB Output is correct
41 Correct 3 ms 12892 KB Output is correct
42 Correct 3 ms 12892 KB Output is correct
43 Correct 2 ms 12892 KB Output is correct
44 Correct 3 ms 12892 KB Output is correct
45 Correct 3 ms 12892 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12888 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12888 KB Output is correct
5 Correct 3 ms 12888 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12888 KB Output is correct
9 Correct 2 ms 12888 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12912 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12892 KB Output is correct
14 Correct 2 ms 12892 KB Output is correct
15 Correct 2 ms 12892 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 2 ms 12892 KB Output is correct
18 Correct 2 ms 12892 KB Output is correct
19 Correct 2 ms 12892 KB Output is correct
20 Correct 2 ms 12892 KB Output is correct
21 Correct 2 ms 12892 KB Output is correct
22 Correct 2 ms 12892 KB Output is correct
23 Correct 2 ms 12928 KB Output is correct
24 Correct 2 ms 12892 KB Output is correct
25 Correct 2 ms 12892 KB Output is correct
26 Correct 2 ms 12888 KB Output is correct
27 Correct 2 ms 12892 KB Output is correct
28 Correct 2 ms 12892 KB Output is correct
29 Correct 3 ms 12892 KB Output is correct
30 Correct 2 ms 12892 KB Output is correct
31 Correct 3 ms 12892 KB Output is correct
32 Correct 3 ms 12892 KB Output is correct
33 Correct 3 ms 12892 KB Output is correct
34 Correct 3 ms 12892 KB Output is correct
35 Correct 3 ms 12892 KB Output is correct
36 Correct 3 ms 12892 KB Output is correct
37 Correct 2 ms 12892 KB Output is correct
38 Correct 3 ms 12892 KB Output is correct
39 Correct 3 ms 12888 KB Output is correct
40 Correct 3 ms 12908 KB Output is correct
41 Correct 3 ms 12892 KB Output is correct
42 Correct 3 ms 12892 KB Output is correct
43 Correct 2 ms 12892 KB Output is correct
44 Correct 3 ms 12892 KB Output is correct
45 Correct 3 ms 12892 KB Output is correct
46 Correct 23 ms 14936 KB Output is correct
47 Correct 27 ms 15452 KB Output is correct
48 Correct 26 ms 15704 KB Output is correct
49 Correct 28 ms 15708 KB Output is correct
50 Correct 30 ms 15964 KB Output is correct
51 Correct 29 ms 15964 KB Output is correct
52 Correct 15 ms 13400 KB Output is correct
53 Correct 10 ms 13148 KB Output is correct
54 Correct 27 ms 15196 KB Output is correct
55 Correct 32 ms 16004 KB Output is correct
56 Correct 30 ms 15456 KB Output is correct
57 Correct 27 ms 15196 KB Output is correct
58 Correct 26 ms 15448 KB Output is correct
59 Correct 27 ms 15452 KB Output is correct
60 Correct 29 ms 15508 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12888 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12888 KB Output is correct
5 Correct 3 ms 12888 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12888 KB Output is correct
9 Correct 2 ms 12888 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12912 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12892 KB Output is correct
14 Correct 2 ms 12892 KB Output is correct
15 Correct 2 ms 12892 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 2 ms 12892 KB Output is correct
18 Correct 2 ms 12892 KB Output is correct
19 Correct 2 ms 12892 KB Output is correct
20 Correct 2 ms 12892 KB Output is correct
21 Correct 2 ms 12892 KB Output is correct
22 Correct 2 ms 12892 KB Output is correct
23 Correct 2 ms 12928 KB Output is correct
24 Correct 2 ms 12892 KB Output is correct
25 Correct 2 ms 12892 KB Output is correct
26 Correct 2 ms 12888 KB Output is correct
27 Correct 2 ms 12892 KB Output is correct
28 Correct 2 ms 12892 KB Output is correct
29 Correct 3 ms 12892 KB Output is correct
30 Correct 2 ms 12892 KB Output is correct
31 Correct 3 ms 12892 KB Output is correct
32 Correct 3 ms 12892 KB Output is correct
33 Correct 3 ms 12892 KB Output is correct
34 Correct 3 ms 12892 KB Output is correct
35 Correct 3 ms 12892 KB Output is correct
36 Correct 3 ms 12892 KB Output is correct
37 Correct 2 ms 12892 KB Output is correct
38 Correct 3 ms 12892 KB Output is correct
39 Correct 3 ms 12888 KB Output is correct
40 Correct 3 ms 12908 KB Output is correct
41 Correct 3 ms 12892 KB Output is correct
42 Correct 3 ms 12892 KB Output is correct
43 Correct 2 ms 12892 KB Output is correct
44 Correct 3 ms 12892 KB Output is correct
45 Correct 3 ms 12892 KB Output is correct
46 Correct 23 ms 14936 KB Output is correct
47 Correct 27 ms 15452 KB Output is correct
48 Correct 26 ms 15704 KB Output is correct
49 Correct 28 ms 15708 KB Output is correct
50 Correct 30 ms 15964 KB Output is correct
51 Correct 29 ms 15964 KB Output is correct
52 Correct 15 ms 13400 KB Output is correct
53 Correct 10 ms 13148 KB Output is correct
54 Correct 27 ms 15196 KB Output is correct
55 Correct 32 ms 16004 KB Output is correct
56 Correct 30 ms 15456 KB Output is correct
57 Correct 27 ms 15196 KB Output is correct
58 Correct 26 ms 15448 KB Output is correct
59 Correct 27 ms 15452 KB Output is correct
60 Correct 29 ms 15508 KB Output is correct
61 Correct 112 ms 18004 KB Output is correct
62 Correct 119 ms 17816 KB Output is correct
63 Correct 118 ms 18268 KB Output is correct
64 Correct 137 ms 20632 KB Output is correct
65 Correct 153 ms 21180 KB Output is correct
66 Correct 146 ms 20920 KB Output is correct
67 Correct 114 ms 19456 KB Output is correct
68 Correct 61 ms 16916 KB Output is correct
69 Correct 126 ms 16888 KB Output is correct
70 Correct 140 ms 20820 KB Output is correct
71 Correct 125 ms 18040 KB Output is correct
72 Correct 117 ms 18256 KB Output is correct
73 Correct 129 ms 19024 KB Output is correct
74 Correct 130 ms 19632 KB Output is correct
75 Correct 132 ms 19440 KB Output is correct