Submission #980742

#	Time	Username	Problem	Language	Result	Execution time	Memory
980742		michified	Holiday (IOI14_holiday)	C++17	0 / 100	3574 ms	1624 KiB

holiday

#include <bits/stdc++.h>
#define ll long long
#define lid id * 2 + 1
#define rid id * 2 + 2
#define pll pair<ll, ll>
#define mp make_pair
#define pb push_back
using namespace std;

struct node_t {
    ll tot, oncnt;
};

int n, d;
vector<node_t> st;
vector<pll> cor, bestdpl, bestdpr, bestdplp1, bestdprp1;
vector<int> pos;

void build(int id, int l, int r) {
    if (l == r) {
        st[id] = {cor[l].first, 0};
        return;
    }
    int mid = (l + r) / 2;
    build(lid, l, mid);
    build(rid, mid + 1, r);
}

ll que(int id, int l, int r, int take) {
    if (take == 0) return 0;
    if (take >= st[id].oncnt) return st[id].tot;
    int mid = (l + r) / 2;
    if (take >= st[lid].oncnt) return st[lid].tot + que(rid, mid + 1, r, take - st[lid].oncnt);
    return que(lid, l, mid, take);
}

void turnon(int id, int l, int r, int tgt, ll tgtval) {
    if (l == r) {
        st[id].oncnt = 1;
        return;
    }
    int mid = (l + r) / 2;
    if (tgt <= mid) turnon(lid, l, mid, tgt, tgtval);
    else turnon(rid, mid + 1, r, tgt, tgtval);
    st[id].oncnt++;
    st[id].tot += tgtval;
}

pll findpos(int d) {
    int i, bestpos;
    ll best = -1, res;
    for (i = 0; i < min(d, n); i++) {
        turnon(0, 0, n - 1, pos[i], cor[pos[i]].first);
        res = que(0, 0, n - 1, d - i);
        if (res > best) {
            best = res;
            bestpos = i;
        }
    }
    return mp(best, bestpos);
}

void dc(vector<pll>& res) {
    int i, j;
    for (i = 0; i <= d; i++) {
        res[i] = findpos(i);
        st.clear();
        st.resize(n * 4);
        build(0, 0, n - 1);
    }
}

ll findMaxAttraction(int N, int start, int D, int att[]) {
    if (N > 3000) return -1;
    int i;
    d = D;
    bestdpl.resize(d + 1);
    bestdpr.resize(d + 1);
    bestdplp1.resize(d + 1);
    bestdprp1.resize(d + 1);

    n = N;
    st.resize(n * 4);
    pos.resize(n);
    for (i = start; i < n; i++) cor.pb(mp(att[i], i - start));
    sort(cor.rbegin(), cor.rend());
    n = cor.size();
    for (i = 0; i < n; i++) pos[cor[i].second] = i;
    build(0, 0, n - 1);
    dc(bestdpr);

    if (start < n - 1) {
        n = N;
        st.clear();
        st.resize(n * 4);
        pos.clear();
        pos.resize(n);
        cor.clear();
        for (i = start + 1; i < n; i++) cor.pb(mp(att[i], i - start - 1));
        sort(cor.rbegin(), cor.rend());
        n = cor.size();
        for (i = 0; i < n; i++) pos[cor[i].second] = i;
        build(0, 0, n - 1);
        dc(bestdprp1);
    }
    
    n = N;
    st.clear();
    st.resize(n * 4);
    pos.clear();
    pos.resize(n);
    cor.clear();
    for (i = start; i >= 0; i--) cor.pb(mp(att[i], start - i));
    sort(cor.rbegin(), cor.rend());
    n = cor.size();
    for (i = start; i >= 0; i--) pos[cor[i].second] = start - i;
    build(0, 0, n - 1);
    dc(bestdpl);

    if (start > 0) {
        n = N;
        st.clear();
        st.resize(n * 4);
        pos.clear();
        pos.resize(n);
        cor.clear();
        for (i = start - 1; i >= 0; i--) cor.pb(mp(att[i], start - i - 1));
        sort(cor.rbegin(), cor.rend());
        n = cor.size();
        for (i = start - 1; i >= 0; i--) pos[cor[i].second] = start - i - 1;
        build(0, 0, n - 1);
        dc(bestdplp1);
    }

    ll ans = max(bestdpl[d].first, bestdpr[d].first);
    // rL
    for (i = 0; i < d; i++) ans = max(ans, bestdpr[i].first + bestdplp1[max(d - bestdpr[i].second - i - 1, 0ll)].first);
    // lR
    for (i = 0; i < d; i++) ans = max(ans, bestdpl[i].first + bestdprp1[max(d - bestdpl[i].second - i - 1, 0ll)].first);
    return ans;
}

Compilation message (stderr)

holiday.cpp: In function 'void dc(std::vector<std::pair<long long int, long long int> >&)':
holiday.cpp:64:12: warning: unused variable 'j' [-Wunused-variable]
   64 |     int i, j;
      |            ^

• Subtask 1: 0 / 7
• Subtask 2: 0 / 23
• Subtask 3: 0 / 17
• Subtask 4: 0 / 53