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Submission #1094951

# Submission time Handle Problem Language Result Execution time Memory
1094951 2024-10-01T02:29:15 Z HiepVu217 Global Warming (CEOI18_glo) C++17
100 / 100
 288 ms 7732 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 17;
int n, c, a[N], b[N], ans;
int st[4 * N], fl[N], fr[N];
void build (int id, int l, int r)
{
    st[id] = 0;
    if (l == r)
    {
        return;
    }
    int mid = l + r >> 1;
    build (id * 2, l, mid);
    build (id * 2 + 1, mid + 1, r);
}
void update (int id, int l, int r, int u, long long z)
{
    if (l == r)
    {
        st[id] = z;
        return;
    }
    int mid = l + r >> 1;
    if (u <= mid)
    {
        update (id * 2, l, mid, u, z);
    }
    else
    {
        update (id * 2 + 1, mid + 1, r, u, z);
    }
    st[id] = max (st[id * 2], st[id * 2 + 1]);
}
int get (int id, int l, int r, int u, int v)
{
    if (u > r || l > v)
    {
        return 0;
    }
    if (u <= l && v >= r)
    {
        return st[id];
    }
    int mid = l + r >> 1;
    return max (get (id * 2, l, mid, u, v), get (id * 2 + 1, mid + 1, r, u, v));
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> c;
    for (int i = 1; i <= n; ++i)
    {
        cin >> a[i];
        b[i] = a[i];
    }
    sort (b + 1, b + n + 1);
    for (int i = 1; i <= n; ++i)
    {
        int id = lower_bound (b + 1, b + n + 1, a[i]) - b;
        fr[i] = get (1, 1, n, 1, id - 1) + 1;
        update (1, 1, n, id, fr[i]);
    }
    build (1, 1, n);
    for (int i = n; i >= 1; --i)
    {
        int id = lower_bound (b + 1, b + n + 1, a[i]) - b;
        fl[i] = get (1, 1, n, 1, n - id) + 1;
        update (1, 1, n, n - id + 1, fl[i]);
    }
    build (1, 1, n);
    for (int i = 1; i <= n; ++i)
    {
        int id = lower_bound (b + 1, b + n + 1, a[i] + c) - b;
        ans = max (ans, get (1, 1, n, 1, id - 1) + fl[i]);
        id = lower_bound (b + 1, b + n + 1, a[i]) - b;
        update (1, 1, n, id, fr[i]);
    }
    cout << ans;
}

Compilation message

glo.cpp: In function 'void build(int, int, int)':
glo.cpp:13:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   13 |     int mid = l + r >> 1;
      |               ~~^~~
glo.cpp: In function 'void update(int, int, int, int, long long int)':
glo.cpp:24:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |     int mid = l + r >> 1;
      |               ~~^~~
glo.cpp: In function 'int get(int, int, int, int, int)':
glo.cpp:45:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 464 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 344 KB Output is correct
11 Correct 0 ms 352 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 464 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 344 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 0 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 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 360 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 464 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 344 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 0 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 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 360 KB Output is correct
19 Correct 1 ms 360 KB Output is correct
20 Correct 1 ms 356 KB Output is correct
21 Correct 1 ms 356 KB Output is correct
22 Correct 1 ms 356 KB Output is correct
23 Correct 1 ms 516 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 278 ms 7328 KB Output is correct
2 Correct 284 ms 7304 KB Output is correct
3 Correct 277 ms 7504 KB Output is correct
4 Correct 288 ms 7504 KB Output is correct
5 Correct 130 ms 6752 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 2240 KB Output is correct
2 Correct 63 ms 2112 KB Output is correct
3 Correct 56 ms 2036 KB Output is correct
4 Correct 30 ms 1880 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 34 ms 2040 KB Output is correct
7 Correct 47 ms 2128 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 4016 KB Output is correct
2 Correct 109 ms 3952 KB Output is correct
3 Correct 232 ms 7324 KB Output is correct
4 Correct 107 ms 6740 KB Output is correct
5 Correct 65 ms 3408 KB Output is correct
6 Correct 115 ms 6560 KB Output is correct
7 Correct 117 ms 7268 KB Output is correct
8 Correct 88 ms 3920 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 464 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 344 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 0 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 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 360 KB Output is correct
19 Correct 1 ms 360 KB Output is correct
20 Correct 1 ms 356 KB Output is correct
21 Correct 1 ms 356 KB Output is correct
22 Correct 1 ms 356 KB Output is correct
23 Correct 1 ms 516 KB Output is correct
24 Correct 1 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 278 ms 7328 KB Output is correct
28 Correct 284 ms 7304 KB Output is correct
29 Correct 277 ms 7504 KB Output is correct
30 Correct 288 ms 7504 KB Output is correct
31 Correct 130 ms 6752 KB Output is correct
32 Correct 57 ms 2240 KB Output is correct
33 Correct 63 ms 2112 KB Output is correct
34 Correct 56 ms 2036 KB Output is correct
35 Correct 30 ms 1880 KB Output is correct
36 Correct 0 ms 344 KB Output is correct
37 Correct 34 ms 2040 KB Output is correct
38 Correct 47 ms 2128 KB Output is correct
39 Correct 108 ms 4016 KB Output is correct
40 Correct 109 ms 3952 KB Output is correct
41 Correct 232 ms 7324 KB Output is correct
42 Correct 107 ms 6740 KB Output is correct
43 Correct 65 ms 3408 KB Output is correct
44 Correct 115 ms 6560 KB Output is correct
45 Correct 117 ms 7268 KB Output is correct
46 Correct 88 ms 3920 KB Output is correct
47 Correct 125 ms 3924 KB Output is correct
48 Correct 123 ms 3964 KB Output is correct
49 Correct 271 ms 7732 KB Output is correct
50 Correct 123 ms 6744 KB Output is correct
51 Correct 112 ms 5716 KB Output is correct
52 Correct 167 ms 6836 KB Output is correct
53 Correct 137 ms 6744 KB Output is correct
54 Correct 130 ms 7504 KB Output is correct
55 Correct 220 ms 7504 KB Output is correct