이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#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;
ret.lzy = 0;
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 (l == r) {st[idx].dp = val; return;}
if (x <= mid) set_dp(l, mid, x, val, idx * 2);
else 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 (l == r) {st[idx].dead = val; return;}
if (x <= mid) set_dead(l, mid, x, val, idx * 2);
else 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 || x > 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++) {
set_dp(1, n, pos[i], 1, 1);
set_dead(1, n, pos[i], i, 1);
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(1ll, qry(1, n, 1, pos[i] - 1, 1) + 1);
set_dp(1, n, pos[i], tmp, 1);
chmax(1, n, pos[i], n, i, 1);
ans = max(ans, tmp);
}
printf("%lld\n", ans);
return 0;
}
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |