Submission #241460

#	Time	Username	Problem	Language	Result	Execution time	Memory
241460		abacaba	Holiday (IOI14_holiday)	C++14	0 / 100	107 ms	65540 KiB

holiday

#include <iostream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include <chrono>
#include <vector>
#include <map>
#include <random>
#include <set>
#include <algorithm>
#include <math.h>
#include <cstdio>
#include <stdio.h>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <deque>
#include <cassert>
#include <stack>
using namespace std;

#define mp make_pair
#define f first
#define se second
#define pb push_back
#define ppb pop_back
#define emb emplace_back
#define ll long long
#define ull unsigned long long
#define cntbit(x) __builtin_popcount(x)
#define endl '\n'
#define uset unordered_set
#define umap unordered_map
#define pii pair<int, int>
#define ld long double
#define pll pair<long long, long long>

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

template <typename T> inline T range(T l, T r) {
    return uniform_int_distribution<T>(l, r)(rng);
}

inline void setin(string s) {
    freopen(s.c_str(), "r", stdin);
}

inline void setout(string s) {
    freopen(s.c_str(), "w", stdout);
}

template <typename T> void Min(T &a, T b) {
    a = min(a, b);
}

template <typename T> void Max(T &a, T b) {
    a = max(a, b);
}

const int inf = 1e9;
const int mod = 998244353;
const int N = 1e5 + 15;
int a[N];
multiset <int> now1, now2;
ll sum1, sum2;

vector <pii> back;

struct node {
    node *l, *r;
    int sum, cnt;
    inline void copy(node *t) {
        if(t)
            l = t->l, r = t->r, sum = t->sum, cnt = t->cnt;
        else
            l = r = NULL, sum = 0, cnt = 0;
    }
    node(node *_l = NULL, node *_r = NULL) {
        l = _l, r = _r;
        sum = cnt = 0;
        if(l)
            sum += l->sum, cnt += l->cnt;
        if(r)
            sum += r->sum, cnt += r->cnt;
    }
};

typedef node* pnode;

vector <pnode> root = {NULL};

inline int get_cnt(pnode t) {
    return t ? t->cnt : 0;
}

inline ll get_sum(pnode t) {
    return t ? t->sum : 0LL;
}

inline pnode get_r(pnode t) {
    return t ? t->r : t;
}

inline pnode get_l(pnode t) {
    return t ? t->l : t;
}

pnode update(pnode t, int tl, int tr, int pos) {
    if(tl == tr) {
        pnode nw = new node(t);
        ++nw->cnt, nw->sum += tl;
        return nw;
    }
    int mid = tl + tr >> 1;
    if(pos <= mid)
        return new node(update(get_l(t), tl, mid, pos), get_r(t));
    return new node(get_l(t), update(get_r(t), mid + 1, tr, pos));
}

ll get_sum_of_k(pnode t1, pnode t2, int tl, int tr, int k) {
    if(k <= 0)
        return 0;

    int cnt = get_cnt(t2) - get_cnt(t1);
    if(cnt <= k)
        return get_sum(t2) - get_sum(t1);

    if(tl == tr)
        return 1LL * max(0, min(cnt, k)) * tl;

    int mid = tl + tr >> 1;

    int cntr = get_cnt(get_r(t2)) - get_cnt(get_r(t1));

    return get_sum_of_k(get_l(t1), get_l(t2), tl, mid, k - cntr) + get_sum_of_k(get_r(t1), get_r(t2), mid + 1, tr, k);

    // if(cntr >= k)
    //     return get_sum_of_k(get_r(t1), get_r(t2), mid + 1, tr, k);
    // return get_sum_of_k(get_l(t1), get_l(t2), tl, mid, k - cntr) + get_sum(get_r(t2)) - get_sum(get_r(t1));
}

long long findMaxAttraction(int n, int start, int d, int attraction[]) {
    for(int i = 0; i < n; ++i)
        a[i+1] = attraction[i];

    for(int i = 1; i <= n; ++i)
        root.pb(update(root.back(), 1, inf, a[i]));

    ++start;

    ll ans = 0;

    for(int i = start; i <= n; ++i) {
        Max(ans, get_sum_of_k(root[start - 1], root[i], 1, inf, d - (i - start)));
        for(int j = start - 1; j >= 1; --j)
            Max(ans, get_sum_of_k(root[j - 1], root[i], 1, inf, d - (i - j) - (i - start)));
    }
    for(int i = start; i >= 1; --i) {
        Max(ans, get_sum_of_k(root[i - 1], root[start], 1, inf, d - (start - i)));
        for(int j = start + 1; j <= n; ++j)
            Max(ans, get_sum_of_k(root[i - 1], root[j], 1, inf, d - (j - i) - (start - i)));
    }
    return ans;
}

Compilation message (stderr)

holiday.cpp: In function 'node* update(pnode, int, int, int)':
holiday.cpp:115:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = tl + tr >> 1;
               ~~~^~~~
holiday.cpp: In function 'long long int get_sum_of_k(pnode, pnode, int, int, int)':
holiday.cpp:132:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = tl + tr >> 1;
               ~~~^~~~

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