Submission #533151

#	Time	Username	Problem	Language	Result	Execution time	Memory
533151		4fecta	Financial Report (JOI21_financial)	C++17	48 / 100	4075 ms	14524 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)

const int MN = 300005;

int n, d, a[MN], ans = 1, dp[MN], dead[MN], pos[MN];
vector<pii> v;

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;
    memset(dp, -0x3f, sizeof(dp));
    memset(dead, 0x3f, sizeof(dead));
    for (int i = 1; i <= n; i++) {
        dp[pos[i]] = 1, dead[pos[i]] = i;
        for (int j = 1; j <= n; j++) if (dead[j] < i - d) dp[j] = -0x3f3f3f3f, dead[j] = 0x3f3f3f3f;
        for (int j = 1; j < pos[i]; j++) dp[pos[i]] = max(dp[pos[i]], dp[j] + 1);
        for (int j = pos[i]; j <= n; j++) dead[j] = max(dead[j], i);
        ans = max(ans, dp[pos[i]]);
    }
    printf("%lld\n", ans);

    return 0;
}

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