Submission #654181

#	Time	Username	Problem	Language	Result	Execution time	Memory
654181		ParsaS	Financial Report (JOI21_financial)	C++14	100 / 100	501 ms	43252 KiB

Main

// In the name of God
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
typedef long long ll;
#define int ll
const int N = 3e5 + 5;
int n, a[N], d;
ll lz[2][N << 2], mx[2][N << 2];
const ll inf = 1e18;

void shift(int t, int v, int Tl, int Tr) {
    if (lz[t][v] == -1)
        return;
    mx[t][v] = lz[t][v];
    if (Tl < Tr) {
        lz[t][v << 1] = lz[t][v];
        lz[t][v << 1 | 1] = lz[t][v];
    }
    lz[t][v] = -1;
}

void upd(int t, int l, int r, int val, int v = 1, int Tl = 1, int Tr = n) {
    shift(t, v, Tl, Tr);
    if (l > Tr || r < Tl)
        return;
    if (Tl >= l && Tr <= r) {
        lz[t][v] = val;
        shift(t, v, Tl, Tr);
        return;
    }
    int mid = (Tl + Tr) >> 1;
    upd(t, l, r, val, v << 1, Tl, mid);
    upd(t, l, r, val, v << 1 | 1, mid + 1, Tr);
    mx[t][v] = max(mx[t][v << 1], mx[t][v << 1 | 1]);
}
int bs(int t, int val, int v = 1, int Tl = 1, int Tr = n) {
    shift(t, v, Tl, Tr);
    if (Tl == Tr) {
        return Tl;
    }
    int mid = (Tl + Tr) >> 1;
    shift(t, v << 1, Tl, mid);
    shift(t, v << 1 | 1, mid + 1, Tr);
    if (mx[t][v << 1] >= val)
        return bs(t, val, v << 1, Tl, mid);
    return bs(t, val, v << 1 | 1, mid + 1, Tr);
}
int get(int t, int i, int v = 1, int Tl = 1, int Tr = n) {
    shift(t, v, Tl, Tr);
    if (i == Tl && i == Tr)
        return mx[t][v];
    int mid = (Tl + Tr) >> 1;
    if (i <= mid)
        return get(t, i, v << 1, Tl, mid);
    return get(t, i, v << 1 | 1, mid + 1, Tr);
}

void solve() {
    cin >> n >> d;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    
    fill(mx[1], mx[1] + (N << 2), inf);
    fill(mx[0], mx[0] + (N << 2), inf);
    memset(lz, -1, sizeof lz);
    // inx, l, r, val
    for (int i = 0; i < n; i++) {
        if (i >= d) {
            int j = bs(0, i - d);
            upd(0, 1, j - 1, get(0, j));
            upd(1, 1, j - 1, get(1, j));
        }
        int j = bs(1, a[i]);
        upd(0, j, n, i);
        upd(1, j, j, a[i]);
        continue;
        cout << i << ' ' << j << endl;
        for (int j = 0; j < n; j++)
            cout << get(1, j) << ' ';
        cout << endl;
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        if (get(1, i) < inf) {
            ans = i;
        }
    }
    cout << ans << endl;
}
int32_t main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    solve();
    return 0;
}

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