Submission #1244011

#	Time	Username	Problem	Language	Result	Execution time	Memory
1244011		HishamAlshehri	Financial Report (JOI21_financial)	C++20	5 / 100	531 ms	26592 KiB

Main

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
// using namespace __gnu_pbds;
 
#define int long long
#define mod 1000000007
#define base 7001
#define base2 757
#define F first
#define S second
// #define pi acos(-1)
#define double long double
// #define ordered_set tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update>
// #define ordered_multiset tree<int, null_type, less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>

// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,sse3,sse4,avx")

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

constexpr int maxn = 1000005;
const int N = 1 << (int)(ceil(log2(maxn)));

int n, d, a[maxn], l, r, tree[2 * N + 5];
bool b[maxn];

int q(int ql, int qr, int i) {
    if (ql >= l && qr <= r) return tree[i];
    if (ql > r || qr < l) return 0;
    return max(q(ql, (ql + qr) / 2, i * 2), q((ql + qr) / 2 + 1, qr, i * 2 + 1));
}

void u(int i) {
    while (i /= 2) tree[i] = max(tree[i * 2], tree[i * 2 + 1]);
}

void compress() {
    map<int, int> mp;
    for (int i = 0; i < n; i++) mp[a[i]] = 1;
    
    int cnt = 0;
    for (auto [i, j] : mp) if (j != NULL) mp[i] = cnt++;

    for (int i = 0; i < n; i++) a[i] = mp[a[i]];
}

signed main()
{
    cin.tie(0) -> sync_with_stdio(0);
    cin >> n >> d;
    for (int i = 0; i < n; i++) cin >> a[i];

    compress();

    int curl = 0, mxl = 0, ans = 0;
    multiset<bool> s;

    for (int i = 0; i < n; i++) {
        if (s.size() && !(*s.begin())) mxl = i - d;

        if (curl < mxl) {
            while (curl < i - d) {
                tree[a[curl] + N] = 0;
                u(a[curl] + N);
                curl++;
            }
        }

        l = 0, r = a[i] - 1;
        int cur = q(0, N - 1, 1) + 1;

        l = a[i], r = N;
        if (q(0, N - 1, 1)) b[i] = 1;
        if (i >= d) {
            s.extract(b[i - d]);
            s.insert(b[i]);
        }

        ans = max(cur, ans);
        tree[a[i] + N] = cur;
        u(a[i] + N);
        
        // cout << cur << ' ' << curl << ' ' << b[i] << ' ' << a[i] << '\n';
    }

    cout << ans;
}

Compilation message (stderr)

Main.cpp: In function 'void compress()':
Main.cpp:45:37: warning: NULL used in arithmetic [-Wpointer-arith]
   45 |     for (auto [i, j] : mp) if (j != NULL) mp[i] = cnt++;
      |                                     ^~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 5 / 5
• Subtask 6: 0 / 35