Submission #632106

#	Time	Username	Problem	Language	Result	Execution time	Memory
632106		arayi	Measures (CEOI22_measures)	C++17	100 / 100	631 ms	35056 KiB

Main

// Arayi
#include <bits/stdc++.h>
#define fr first
#define sc second
#define MP make_pair
#define ad push_back
#define PB push_back
#define fastio                        \
    ios_base::sync_with_stdio(false); \
    cin.tie(0);                       \
    cout.tie(0);
#define lli long long int
#define y1 arayikhalatyan
#define j1 jigglypuff
#define ld long double
#define itn int
#define pir pair<int, int>
#define all(x) (x).begin(), (x).end()
#define str string
#define enl endl
#define en endl
#define cd complex<long double>
#define vcd vector<cd>
#define vii vector<int>
#define vlli vector<lli>
using namespace std;

lli gcd(lli a, lli b) { return (b == 0LL ? a : gcd(b, a % b)); }
ld dist(ld x, ld y1, ld x2, ld y2)
{
    return sqrt((x - x2) * (x - x2) + (y1 - y2) * (y1 - y2));
}
lli S(lli a)
{
    return (a * (a + 1LL)) / 2;
}
mt19937 rnd(363542);
char vow[] = {'a', 'e', 'i', 'o', 'u'};
int dx[] = {0, -1, 0, 1, -1, -1, 1, 1, 0};
int dy[] = {-1, 0, 1, 0, -1, 1, -1, 1, 0};
char dc[] = {'R', 'D', 'L', 'U'};

const int N = 5e5 + 20;
const lli mod = 1e9 + 7;
const ld pi = acos(-1);
const ld e = 1e-13;
const int T = 128;

lli bp(lli a, lli b = mod - 2LL)
{
    lli ret = 1;
    while (b)
    {
        if (b & 1)
            ret *= a, ret %= mod;
        a *= a;
        a %= mod;
        b >>= 1;
    }
    return ret;
}
ostream &operator<<(ostream &c, pir a)
{
    c << a.fr << " " << a.sc;
    return c;
}
template <class T>
void maxi(T &a, T b)
{
    a = max(a, b);
}
template <class T>
void mini(T &a, T b)
{
    a = min(a, b);
}

int n, m;
lli x[N];
lli sum, d;
lli fl[4 * N], t[4 * N], t1[4 * N];
void push(int nd)
{
    fl[nd * 2] += fl[nd];
    fl[nd * 2 + 1] += fl[nd];
    t[nd] += fl[nd];
    t1[nd] += fl[nd];
    fl[nd] = 0;
}
void upd(int l, int r, lli v, int nl = 0, int nr = n + m + 1, int nd = 1)
{
    push(nd);
    if (l > nr || r < nl)
        return;
    if (l == nl && r == nr)
    {
        fl[nd] += v;
        push(nd);
        return;
    }
    int md = (nl + nr) / 2;
    upd(l, min(md, r), v, nl, md, nd * 2);
    upd(max(md + 1, l), r, v, md + 1, nr, nd * 2 + 1);
    t[nd] = min(t[nd * 2], t[nd * 2 + 1]);
    t1[nd] = max(t1[nd * 2], t1[nd * 2 + 1]);
}
lli qry(int l, int r, bool b, int nl = 0, int nr = n + m + 1, int nd = 1)
{
    push(nd);
    if (l > nr || r < nl)
    {
        if (b)
            return LLONG_MAX;
        else
            return LLONG_MIN;
    }
    if (l == nl && r == nr)
    {
        if (b)
            return t[nd];
        return t1[nd];
    }
    int md = (nl + nr) / 2;
    if (b)
        return min(qry(l, min(md, r), b, nl, md, nd * 2), qry(max(md + 1, l), r, b, md + 1, nr, nd * 2 + 1));
    return max(qry(l, min(md, r), b, nl, md, nd * 2), qry(max(md + 1, l), r, b, md + 1, nr, nd * 2 + 1));
}
int main()
{
    fastio;
    //freopen("input.in", "r", stdin);
    cin >> n >> m >> d;
    vector<pair<lli, int>> fp;
    for (int i = 1; i <= n; i++)
    {
        cin >> x[i];
        fp.ad(MP(x[i], i));
    }
    for (int i = n + 1; i <= n + m; i++)
    {
        cin >> x[i];
        fp.ad(MP(x[i], i));
    }
    sort(all(fp));
    set<int> st;
    for (int i = 1; i <= n; i++)
    {
        int i1 = upper_bound(all(fp), MP(x[i], i)) - fp.begin() - 1;
        auto p = st.upper_bound(i1);
        // cout << i1 << "-";
        if (p != st.end() && p != st.begin())
        {
            int hj = *p;
            int nx = *(--p);
            upd(i1 + 1, n + m + 1, d - (fp[hj].fr - x[i]));
            upd(nx + 1, n + m + 1, d - (x[i] - fp[nx].fr));
            upd(nx + 1, n + m + 1, -d + fp[hj].fr - fp[nx].fr);
            // cout << nx << " " << fp[nx].fr << endl;
            // cout << hj << " " << fp[hj].fr << endl;
        }
        else if (p != st.end())
        {
            int hj = *p;
            upd(i1 + 1, n + m + 1, d - (fp[hj].fr - x[i]));
            // cout << hj << " " << fp[hj].fr << endl;
        }
        else if (p != st.begin())
        {
            int nx = *(--p);
            upd(nx + 1, n + m + 1, d - (x[i] - fp[nx].fr));
            // cout << nx << " " << fp[nx].fr << endl;
        }
        maxi(sum, qry(i1, n + m + 1, 0) - qry(0, i1, 1));
        st.insert(i1);
        // cout << endl;
    }
    // cout << qry(0, 0, 0) << " " << qry(1, 1, 0) << " " << qry(2, 2, 0) << " " << qry(3, 3, 0) << " " << qry(4, 4, 0) << endl;
    for (int i = n + 1; i <= n + m; i++)
    {
        int i1 = upper_bound(all(fp), MP(x[i], i)) - fp.begin() - 1;
        auto p = st.upper_bound(i1);
        // cout << i1 << "-";
        if (p != st.end() && p != st.begin())
        {
            int hj = *p;
            int nx = *(--p);
            upd(i1 + 1, n + m + 1, d - (fp[hj].fr - x[i]));
            upd(nx + 1, n + m + 1, d - (x[i] - fp[nx].fr));
            upd(nx + 1, n + m + 1, -d + fp[hj].fr - fp[nx].fr);
            // cout << nx << " " << fp[nx].fr << endl;
            // cout << hj << " " << fp[hj].fr << endl;
        }
        else if (p != st.end())
        {
            int hj = *p;
            upd(i1 + 1, n + m + 1, d - (fp[hj].fr - x[i]));
            // cout << hj << " " << fp[hj].fr << endl;
        }
        else if (p != st.begin())
        {
            int nx = *(--p);
            upd(nx + 1, n + m + 1, d - (x[i] - fp[nx].fr));
            // cout << nx << " " << fp[nx].fr << endl;
        }
        maxi(sum, qry(i1, n + m + 1, 0) - qry(0, i1, 1));
        st.insert(i1);
        if (sum % 2LL == 0)
            cout << sum / 2LL << " ";
        else
            cout << sum / 2LL << ".5 ";
    }
    // cout << qry(0, 0, 0) << " " << qry(1, 1, 0) << " " << qry(2, 2, 0) << " " << qry(3, 3, 0) << " " << qry(4, 4, 0) << endl;
    cout << endl;
    return 0;
}

/*
    __
  *(><)*
    \/ /
    ||/
  --||
    ||
    /\
   /  \
  /    \

*/

• Subtask 1: 10 / 10
• Subtask 2: 14 / 14
• Subtask 3: 35 / 35
• Subtask 4: 41 / 41