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Submission #1096354

# Submission time Handle Problem Language Result Execution time Memory
1096354 2024-10-04T10:44:02 Z ducdev Global Warming (CEOI18_glo) C++14
38 / 100
 63 ms 7640 KB 
// Author: 4uckd3v - Nguyen Cao Duc
#include <bits/stdc++.h>
using namespace std;

#define all(x) (x).begin(), (x).end()

typedef long long ll;

const int MAX_N = 1e6;
const int MOD = 1e9 + 7;

int n;
ll a[MAX_N + 5], x;

struct FenwickTree {
    vector<int> bit;
    int n;

    void update(int pos, int val) {
        for (; pos <= n; pos += pos & (-pos))
            bit[pos] = max(bit[pos], val);
    };

    int get(int pos) {
        int ret = 0;
        for (; pos > 0; pos -= pos & (-pos))
            ret = max(ret, bit[pos]);
        return ret;
    };

    FenwickTree(int n) : n(n) {
        bit.assign(n + 5, 0);
    };
};

namespace SUBTASK_1 {
    const int N = MAX_N;

    int dp[N + 5][5];

    void Solve() {
        int res = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 0; j < 5; j++) dp[i][j] = 1;
            for (int j = 1; j < i; j++) {
                if (a[i] + x > a[j]) {
                    dp[i][1] = max(dp[i][1], dp[j][0] + 1);
                };
                if (a[i] - x > a[j]) {
                    dp[i][2] = max(dp[i][2], dp[j][0] + 1);
                };
                if (a[i] > a[j]) {
                    dp[i][0] = max(dp[i][0], dp[j][0] + 1);
                    dp[i][1] = max(dp[i][1], dp[j][1] + 1);
                    dp[i][2] = max(dp[i][2], dp[j][2] + 1);
                };
                if (a[i] > a[j] + x) {
                    dp[i][3] = max(dp[i][3], dp[j][1] + 1);
                };
                if (a[i] > a[j] - x) {
                    dp[i][4] = max(dp[i][4], dp[j][2] + 1);
                };
            }
            res = max({res, dp[i][0], dp[i][1], dp[i][2], dp[i][3], dp[i][4]});
        }

        cout << res << '\n';
    };
};  // namespace SUBTASK_1

namespace SUBTASK_2 {
    const int N = MAX_N;

    ll c[N + 5];

    void Solve() {
        vector<ll> v;
        for (int i = 1; i <= n; i++) c[i] = a[i];
        for (int i = 1; i <= n; i++) v.push_back(c[i]);

        sort(all(v));
        v.resize(unique(all(v)) - v.begin());

        for (int i = 1; i <= n; i++) {
            c[i] = lower_bound(all(v), c[i]) - v.begin() + 1;
        };

        FenwickTree bit(n);
        int res = 0;
        for (int i = 1; i <= n; i++) {
            int dp = bit.get(c[i] - 1);
            bit.update(c[i], dp + 1);
            res = max(res, dp + 1);
        }

        cout << res << '\n';
    };
};  // namespace SUBTASK_2

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if (fopen("MAIN.INP", "r")) {
        freopen("MAIN.INP", "r", stdin);
        freopen("MAIN.OUT", "w", stdout);
    };

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

    if (x == 0)
        return SUBTASK_2::Solve(), 0;

if (n <= 1000)   return SUBTASK_1::Solve(), 0;
  cout<< n;
};

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:104:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |         freopen("MAIN.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:105:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |         freopen("MAIN.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 1 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 1 ms 348 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 604 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 1 ms 348 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 604 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 3 ms 348 KB Output is correct
20 Correct 2 ms 348 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 0 ms 472 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 2 ms 344 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 7628 KB Output is correct
2 Correct 58 ms 7636 KB Output is correct
3 Correct 58 ms 7636 KB Output is correct
4 Correct 62 ms 7640 KB Output is correct
5 Correct 29 ms 6868 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 2216 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 1 ms 348 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 604 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 3 ms 348 KB Output is correct
20 Correct 2 ms 348 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 0 ms 472 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 2 ms 344 KB Output is correct
27 Correct 63 ms 7628 KB Output is correct
28 Correct 58 ms 7636 KB Output is correct
29 Correct 58 ms 7636 KB Output is correct
30 Correct 62 ms 7640 KB Output is correct
31 Correct 29 ms 6868 KB Output is correct
32 Incorrect 4 ms 1116 KB Output isn't correct
33 Halted 0 ms 0 KB -