Submission #654193

#	Time	Username	Problem	Language	Result	Execution time	Memory
654193		mhn2	Financial Report (JOI21_financial)	C++17	60 / 100	4067 ms	4964 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;

const int N = 3e5+5;
int n, d;
int a[N], dp[N], nx[N];

void input() {
    cin >> n >> d;
    for (int i = 0; i < n; i++)
        cin >> a[i];
}

void solve1() {
    int ans = 0;
    for (int i = n-1; i > -1; i--) {
        int t = 0;
        for (int j = i+1; j < n; j++) {
            if (a[j] <= a[i]) {
                t = 0;
                continue;
            }

            t++;
            dp[i] = max(dp[i], dp[j]);
            
            if (t == d)
                break;
        }
        dp[i]++;
        ans = max(ans, dp[i]);
    }
    cout << ans << endl;
}

void solve2() {
    stack<int> st;
    for (int i = 0; i < n; i++) {
        while (st.size() && a[st.top()] < a[i]) {
            nx[st.top()] = i;
            st.pop();
        }
        st.push(i);
    }
    while (st.size()) {
        nx[st.top()] = n;
        st.pop();
    }
    dp[n] = 0;
    for (int i = n-1; i > -1; i--)
        dp[i] = dp[nx[i]] + 1;

    int ans = 1;
    for (int i = 0; i < n; i++)
        ans = max(ans, dp[i]);
    cout << ans;
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    input();
    if (d == 1)
        solve2();
    else
        solve1();
}

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