Submission #289741

#	Time	Username	Problem	Language	Result	Execution time	Memory
289741		HynDuf	Lightning Conductor (POI11_pio)	C++14	100 / 100	286 ms	14164 KiB

pio

#include <bits/stdc++.h>

#define task "C"
#define all(v) (v).begin(), (v).end()
#define rep(i, l, r) for (int i = (l); i <= (r); ++i)
#define Rep(i, r, l) for (int i = (r); i >= (l); --i)
#define DB(X) { cerr << #X << " = " << (X) << '\n'; }
#define DB1(A, _) { cerr << #A << "[" << _ << "] = " << (A[_]) << '\n'; }
#define DB2(A, _, __) { cerr << #A << "[" << _ << "][" << __ << "] = " << (A[_][__]) << '\n'; }
#define DB3(A, _, __, ___) { cerr << #A << "[" << _ << "][" << __ << "][" << ___ << "] = " << (A[_][__][___]) << '\n'; }
#define PR(A, l, r) { cerr << '\n'; rep(_, l, r) DB1(A, _); cerr << '\n';}
#define SZ(x) ((int)(x).size())
#define pb push_back
#define eb emplace_back
#define pf push_front
#define F first
#define S second
#define by(x) [](const auto& a, const auto& b) { return a.x < b.x; } // sort(arr, arr + N, by(a));
#define next ___next
#define prev ___prev
#define y1 ___y1
#define left ___left
#define right ___right
#define y0 ___y0
#define div ___div
#define j0 ___j0
#define jn ___jn

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using namespace std;
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<ll> vl;
const int N = 5e5 + 2;
int n, h[N], sq[N], dp[N];
int cost(int i, int j)
{
    return h[j] + sq[abs(i - j)];
}
ld costd(int i, int j)
{
    return h[j] + (ld) (sqrt(abs(i - j)));
}
void cal(int l, int r, int optl, int optr)
{
    if (l > r) return;
    int m = (l + r) >> 1, opt = optl;
    rep(k, optl + 1, min(m, optr)) if (costd(m, k) > costd(m, opt)) opt = k;
    dp[m] = max(dp[m], cost(m, opt));
    cal(l, m - 1, optl, opt);
    cal(m + 1, r, opt, optr);
}
int main()
{
#ifdef HynDuf
    freopen(task".in", "r", stdin);
    //freopen(task".out", "w", stdout);
#else
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
#endif
    cin >> n;
    rep(i, 1, n) cin >> h[i];
    rep(i, 1, 708)
    {
        if (i * i >= n)
        {
            sq[n] = i;
            break;
        }
        sq[i * i] = i;
    }
    Rep(i, n - 1, 2) if (!sq[i]) sq[i] = sq[i + 1];
    cal(1, n, 1, n);
    reverse(h + 1, h + 1 + n);
    reverse(dp + 1, dp + 1 + n);
    cal(1, n, 1, n);
    Rep(i, n, 1) cout << dp[i] - h[i] << '\n';
    return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 9 / 9
• Subtask 9: 9 / 9
• Subtask 10: 9 / 9
• Subtask 11: 10 / 10