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Submission #424217

# Submission time Handle Problem Language Result Execution time Memory
424217 2021-06-11T18:09:16 Z fskarica Global Warming (CEOI18_glo) C++14
100 / 100
 893 ms 33904 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define fi first
#define se second

const int MAX = 4e5 + 10;
int n, k;
int x, y;
int ucit[MAX];
int arr[MAX];
int treeFront[4 * MAX];
int treeBack[4 * MAX];
int dpFront[MAX];
int dpBack[MAX];
vector <int> v;
map <int, int> mp;
int id;

void updateFront(int left, int right, int a, int idx, int val) {
    if (left > a || a > right) return;
    if (left == right) {
        treeFront[idx] = max(treeFront[idx], val);
        return;
    }

    int mid = (left + right) / 2;
    updateFront(left, mid, a, idx * 2, val);
    updateFront(mid + 1, right, a, idx * 2 + 1, val);

    treeFront[idx] = max(treeFront[idx * 2], treeFront[idx * 2 + 1]);
}

void updateBack(int left, int right, int a, int idx, int val) {
    if (left > a || a > right) return;
    if (left == right) {
        treeBack[idx] = max(treeBack[idx], val);
        return;
    }

    int mid = (left + right) / 2;
    updateBack(left, mid, a, idx * 2, val);
    updateBack(mid + 1, right, a, idx * 2 + 1, val);

    treeBack[idx] = max(treeBack[idx * 2], treeBack[idx * 2 + 1]);
}

int queryFront(int left, int right, int a, int idx) {
    if (left > a) return 0;
    if (a >= right) {
        return treeFront[idx];
    }

    int mid = (left + right) / 2;
    int ret1 = queryFront(left, mid, a, idx * 2);
    int ret2 = queryFront(mid + 1, right, a, idx * 2 + 1);

    return max(ret1, ret2);
}

int queryBack(int left, int right, int a, int idx) {
    if (right < a) return 0;
    if (a <= left) {
        return treeBack[idx];
    }

    int mid = (left + right) / 2;
    int ret1 = queryBack(left, mid, a, idx * 2);
    int ret2 = queryBack(mid + 1, right, a, idx * 2 + 1);

    return max(ret1, ret2);
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> k;

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

        v.push_back(ucit[i]);
        v.push_back(ucit[i] + k);
    }
    sort(v.begin(), v.end());

    mp[v[0]] = 0;

    id = 1;
    for (int i = 1; i < v.size(); i++) {
        if (v[i] == v[i - 1]) continue;

        mp[v[i]] = id;
        id++;
    }

    for (int i = 1; i <= n; i++) {
        arr[i] = mp[ucit[i]];
    }

    for (int i = n; i >= 1; i--) {
        x = arr[i];

        dpBack[i] = queryBack(0, 2 * n - 1, x + 1, 1) + 1;
        updateBack(0, 2 * n - 1, x, 1, dpBack[i]);
    }

    int sol = queryBack(0, 2 * n - 1, -1, 1);
    for (int i = 1; i < n; i++) {
        x = arr[i];

        dpFront[i] = queryFront(0, 2 * n - 1, x - 1, 1) + 1;
        updateFront(0, 2 * n - 1, x, 1, dpFront[i]);

        sol = max(sol, queryFront(0, 2 * n - 1, mp[ucit[i + 1] + k] - 1 , 1) + dpBack[i + 1]);
    }

    cout << sol << "\n";

    return 0;
}

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:92:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |     for (int i = 1; i < v.size(); i++) {
      |                     ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 320 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 1 ms 460 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 2 ms 460 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 660 ms 18700 KB Output is correct
2 Correct 675 ms 18536 KB Output is correct
3 Correct 636 ms 18556 KB Output is correct
4 Correct 589 ms 18624 KB Output is correct
5 Correct 256 ms 11864 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 128 ms 8200 KB Output is correct
2 Correct 160 ms 8244 KB Output is correct
3 Correct 134 ms 8160 KB Output is correct
4 Correct 65 ms 4840 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 85 ms 5120 KB Output is correct
7 Correct 122 ms 7600 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 287 ms 14168 KB Output is correct
2 Correct 312 ms 14848 KB Output is correct
3 Correct 672 ms 29580 KB Output is correct
4 Correct 310 ms 16504 KB Output is correct
5 Correct 185 ms 14192 KB Output is correct
6 Correct 360 ms 26824 KB Output is correct
7 Correct 366 ms 26716 KB Output is correct
8 Correct 218 ms 14140 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 1 ms 460 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 2 ms 460 KB Output is correct
27 Correct 660 ms 18700 KB Output is correct
28 Correct 675 ms 18536 KB Output is correct
29 Correct 636 ms 18556 KB Output is correct
30 Correct 589 ms 18624 KB Output is correct
31 Correct 256 ms 11864 KB Output is correct
32 Correct 128 ms 8200 KB Output is correct
33 Correct 160 ms 8244 KB Output is correct
34 Correct 134 ms 8160 KB Output is correct
35 Correct 65 ms 4840 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 85 ms 5120 KB Output is correct
38 Correct 122 ms 7600 KB Output is correct
39 Correct 287 ms 14168 KB Output is correct
40 Correct 312 ms 14848 KB Output is correct
41 Correct 672 ms 29580 KB Output is correct
42 Correct 310 ms 16504 KB Output is correct
43 Correct 185 ms 14192 KB Output is correct
44 Correct 360 ms 26824 KB Output is correct
45 Correct 366 ms 26716 KB Output is correct
46 Correct 218 ms 14140 KB Output is correct
47 Correct 370 ms 17188 KB Output is correct
48 Correct 403 ms 17112 KB Output is correct
49 Correct 893 ms 33904 KB Output is correct
50 Correct 317 ms 19804 KB Output is correct
51 Correct 270 ms 14600 KB Output is correct
52 Correct 361 ms 19908 KB Output is correct
53 Correct 422 ms 29364 KB Output is correct
54 Correct 416 ms 29944 KB Output is correct
55 Correct 561 ms 29500 KB Output is correct