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Submission #863155

# Submission time Handle Problem Language Result Execution time Memory
863155 2023-10-19T17:12:25 Z truongdoan2012 Bigger segments (IZhO19_segments) C++17
100 / 100
 192 ms 23524 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif

using i64 = long long;
const int N = 5e5 + 10;
i64 t[N << 2];

void upd(int id, int l, int r, int p, i64 v) {
  if (l == r) {
    return void(t[id] = v);
  }
  int mid = (l + r) >> 1;
  if (p <= mid) {
    upd(id << 1, l, mid, p, v);
  } else {
    upd(id << 1 | 1, mid + 1, r, p, v);
  }
  t[id] = min(t[id << 1], t[id << 1 | 1]);
}

int get(int id, int l, int r, int u, int v, i64 val) {
  if (l > v || r < u || t[id] > val) {
    return -1;
  }
  if (l == r) {
    return l;
  }
  int mid = (l + r) >> 1;
  auto rs = get(id << 1 | 1, mid + 1, r, u, v, val);
  if (~rs) {
    return rs;
  }
  return get(id << 1, l, mid, u, v, val);
}

void solve() {
  int n;
  cin >> n;
  vector<i64> a(n + 1), p(n + 1);
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    p[i] = p[i - 1] + a[i];
    upd(1, 0, n, i, 1e18);
  }
  vector<int> d(n + 1);
  for (int i = 1; i <= n; i++) {
    int pv = get(1, 0, n, 0, i, p[i]);
    d[i] = d[pv] + 1;
    upd(1, 0, n, i, p[i] * 2 - p[pv]);
  }
  cout << d[n];
  //[l, r] [r + 1, v]
  //p[r] - p[l - 1] <= p[v] - p[r]
  //2p[r] - p[l - 1] <= p[v]
}

int main() {
  cin.tie(nullptr) -> sync_with_stdio(false);
  int TC = 1;
  //cin >> TC;
  while (TC--) {
    solve();
  }
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 464 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 464 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 480 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 464 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 352 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 464 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 480 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 464 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 352 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 480 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 604 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 1 ms 604 KB Output is correct
43 Correct 1 ms 620 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 604 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 464 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 480 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 464 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 352 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 480 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 604 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 1 ms 604 KB Output is correct
43 Correct 1 ms 620 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 604 KB Output is correct
46 Correct 29 ms 4824 KB Output is correct
47 Correct 31 ms 4960 KB Output is correct
48 Correct 31 ms 5340 KB Output is correct
49 Correct 34 ms 5460 KB Output is correct
50 Correct 38 ms 5464 KB Output is correct
51 Correct 37 ms 5468 KB Output is correct
52 Correct 17 ms 3928 KB Output is correct
53 Correct 11 ms 3420 KB Output is correct
54 Correct 31 ms 4700 KB Output is correct
55 Correct 35 ms 5464 KB Output is correct
56 Correct 34 ms 5024 KB Output is correct
57 Correct 32 ms 4956 KB Output is correct
58 Correct 32 ms 4956 KB Output is correct
59 Correct 34 ms 5220 KB Output is correct
60 Correct 33 ms 5452 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 464 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 480 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 464 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 352 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 480 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 604 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 1 ms 604 KB Output is correct
43 Correct 1 ms 620 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 604 KB Output is correct
46 Correct 29 ms 4824 KB Output is correct
47 Correct 31 ms 4960 KB Output is correct
48 Correct 31 ms 5340 KB Output is correct
49 Correct 34 ms 5460 KB Output is correct
50 Correct 38 ms 5464 KB Output is correct
51 Correct 37 ms 5468 KB Output is correct
52 Correct 17 ms 3928 KB Output is correct
53 Correct 11 ms 3420 KB Output is correct
54 Correct 31 ms 4700 KB Output is correct
55 Correct 35 ms 5464 KB Output is correct
56 Correct 34 ms 5024 KB Output is correct
57 Correct 32 ms 4956 KB Output is correct
58 Correct 32 ms 4956 KB Output is correct
59 Correct 34 ms 5220 KB Output is correct
60 Correct 33 ms 5452 KB Output is correct
61 Correct 155 ms 20564 KB Output is correct
62 Correct 162 ms 20588 KB Output is correct
63 Correct 166 ms 20824 KB Output is correct
64 Correct 181 ms 23120 KB Output is correct
65 Correct 192 ms 23524 KB Output is correct
66 Correct 181 ms 23464 KB Output is correct
67 Correct 144 ms 20308 KB Output is correct
68 Correct 70 ms 10572 KB Output is correct
69 Correct 169 ms 19564 KB Output is correct
70 Correct 183 ms 23380 KB Output is correct
71 Correct 180 ms 20560 KB Output is correct
72 Correct 179 ms 20976 KB Output is correct
73 Correct 186 ms 21328 KB Output is correct
74 Correct 183 ms 21940 KB Output is correct
75 Correct 186 ms 21744 KB Output is correct