제출 #533158

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
533158		4fecta	Financial Report (JOI21_financial)	C++17	100 / 100	917 ms	45764 KiB

Main

#include <bits/stdc++.h>
 
using namespace std;
#define ll long long
#define int ll
#define ld long double
#define pii pair<int, int>
#define f first
#define s second
#define boost() cin.tie(0), cin.sync_with_stdio(0)
#define mid ((l + r) / 2)
 
struct node {
    int dp, dead, i, lzy;
};
 
const int MN = 300005;
 
int n, d, a[MN], ans = 1, pos[MN];
vector<pii> v;
node st[4 * MN];
 
node push_up(node p, node q) {
    node ret{};
    ret.dp = max(p.dp, q.dp);
    if (p.dead < q.dead) ret.dead = p.dead, ret.i = p.i;
    else ret.dead = q.dead, ret.i = q.i;
    return ret;
}
 
void push_down(int l, int r, int idx) {
    if (!st[idx].lzy) return;
    st[idx].dead = max(st[idx].dead, st[idx].lzy);
    if (l != r) st[idx * 2].lzy = max(st[idx * 2].lzy, st[idx].lzy), st[idx * 2 + 1].lzy = max(st[idx * 2 + 1].lzy, st[idx].lzy);
    st[idx].lzy = 0;
}
 
void build(int l, int r, int idx) {
    if (l == r) {st[idx] = {-0x3f3f3f3f, 0x3f3f3f3f, l, 0}; return;}
    build(l, mid, idx * 2), build(mid + 1, r, idx * 2 + 1);
    st[idx] = push_up(st[idx * 2], st[idx * 2 + 1]);
}
 
void set_dp(int l, int r, int x, int val, int idx) {
    push_down(l, r, idx);
    if (x < l || r < x) return;
    if (l == r) {st[idx].dp = val; return;}
    set_dp(l, mid, x, val, idx * 2);
    set_dp(mid + 1, r, x, val, idx * 2 + 1);
    st[idx] = push_up(st[idx * 2], st[idx * 2 + 1]);
}
 
void set_dead(int l, int r, int x, int val, int idx) {
    push_down(l, r, idx);
    if (x < l || r < x) return;
    if (l == r) {st[idx].dead = val; return;}
    set_dead(l, mid, x, val, idx * 2);
    set_dead(mid + 1, r, x, val, idx * 2 + 1);
    st[idx] = push_up(st[idx * 2], st[idx * 2 + 1]);
}
 
void chmax(int l, int r, int x, int y, int val, int idx) {
    push_down(l, r, idx);
    if (r < x || l > y) return;
    if (r <= y && l >= x) {
        st[idx].lzy = val;
        push_down(l, r, idx);
        return;
    }
    chmax(l, mid, x, y, val, idx * 2), chmax(mid + 1, r, x, y, val, idx * 2 + 1);
    st[idx] = push_up(st[idx * 2], st[idx * 2 + 1]);
}
 
int qry(int l, int r, int x, int y, int idx) {
    push_down(l, r, idx);
    if (r < x || l > y) return -0x3f3f3f3f;
    if (r <= y && l >= x) return st[idx].dp;
    return max(qry(l, mid, x, y, idx * 2), qry(mid + 1, r, x, y, idx * 2 + 1));
}
 
bool cmp(pii p, pii q) {
    if (p.f != q.f) return p.f < q.f;
    return p.s > q.s;
}
 
int32_t main() {
    boost();
 
    cin >> n >> d;
    for (int i = 1; i <= n; i++) cin >> a[i], v.push_back({a[i], i});
    sort(v.begin(), v.end(), cmp);
    for (int i = 0; i < n; i++) pos[v[i].s] = i + 1;
    build(1, n, 1);
    for (int i = 1; i <= n; i++) {
        while (st[1].dead < i - d) {
            int j = st[1].i;
            set_dp(1, n, j, -0x3f3f3f3f, 1);
            set_dead(1, n, j, 0x3f3f3f3f, 1);
        }
        int tmp = max(0ll, qry(1, n, 1, pos[i], 1)) + 1;
        set_dead(1, n, pos[i], i, 1);
        chmax(1, n, pos[i], n, i, 1);
        ans = max(ans, tmp);
        set_dp(1, n, pos[i], tmp, 1);
    }
    printf("%lld\n", ans);
 
    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