Submission #654167

#	Time	Username	Problem	Language	Result	Execution time	Memory
654167		ParsaS	Financial Report (JOI21_financial)	C++14	60 / 100	37 ms	5084 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;
const ll inf = 1e18;
ll arr[2][N];

void upd(int t, int l, int r, int val) {
    for (int i = l; i <= r; i++)
        arr[t][i] = val;
}
int bs(int t, int val) {
    for (int i = 1; i < N; i++) {
        if (arr[t][i] >= val)
            return i;
    }
}
int get(int t, int i) {
    return arr[t][i];
}

void solve() {
    cin >> n >> d;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    if (n > 7000)
        return;

    fill(arr[1], arr[1] + N, inf);
    fill(arr[0], arr[0] + N, inf);

    // inx, l, r, val
    for (int i = 0; i < n; i++) {
        if (i >= d) {
            int j = bs(0, i - d);
            //cout << "bs " << j << endl;
            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;
        for (int j = 1; j < n; j++)
            cout << arr[1][j] << ' ';
        cout << endl;
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        if (get(1, i) < inf) {
            ans = i;
        }
    }
    cout << ans << endl;
}
void solve2() {
    if (n <= 7000)
        return;
    int ans = 0;
    stack<int> st;
    for (int i = n - 1; i >= 0; i--) {
        while (!st.empty() && a[st.top()] <= a[i]) {
            st.pop();
        }
        st.push(i);
        ans = max(ans, (int)st.size());
    }
    cout << ans << endl;
}

int32_t main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    solve();
    solve2();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'll bs(ll, ll)':
Main.cpp:23:1: warning: control reaches end of non-void function [-Wreturn-type]
   23 | }
      | ^

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