oj.uz

답안 #962443

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
962443 2024-04-13T14:06:38 Z 12345678 Cake 3 (JOI19_cake3) C++17
0 / 100
 2 ms 6492 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=2e5+5;

ll n, m, cnt, ans;
map<ll, ll> mp;

struct cake
{
    ll v, c, idx;
    cake(): v(0), c(0), idx(0){}
    bool operator< (const  cake &o) const {return c<o.c;}
} c[nx];

struct persist
{
    struct node
    {
        ll f, s;
        node *l, *r;
        node(ll f, ll s): f(f), s(s){}
    };
    typedef node* pnode;
    pnode rt[nx];
    void build(int l, int r, pnode &k)
    {
        k=new node(0, 0);
        if (l==r) return;
        int md=(l+r)/2;
        build(l, md, k->l);
        build(md+1, r, k->r);
        k->f=k->l->f+k->r->f;
        k->s=k->l->s+k->r->s;
    }
    void update(int l, int r, pnode &k, pnode t, int idx, ll vl)
    {
        k=new node(*t);
        if (l==r) return k->f++, k->s+=vl, void();
        int md=(l+r)/2;
        if (idx<=md) update(l, md, k->l, t->l, idx, vl);
        else update(md+1, r, k->r, t->r, idx, vl);
        k->f=k->l->f+k->r->f;
        k->s=k->l->s+k->r->s;
    }
    ll query2(int l, int r, pnode k, pnode t, ll key)
    {
        if (key==0||k->f-t->f==0) return 0;
        if (l==r) return min(key, k->f-t->f)*((k->s)/(k->f));
        int md=(l+r)/2;
        if (k->r->f-t->r->f<=key) return query2(l, md, k->l, t->l, key-(k->r->f-t->r->f))+k->r->s-t->r->s;
        else return query2(md+1, r, k->r, t->r, key);
    }
    ll query(int l, int r)
    {
        if (r-l+1<m) return cout<<1/0, -1e18;
        return query2(1, n, rt[r], rt[l-1], m)-2*(c[r].c-c[l].c);
    }
} s;

void solve(int l, int r, int optl, int optr)
{
    if (r<l) return;
    int md=(l+r)/2;
    pair<ll, ll> mx={-1e18, 0};
    for (int i=optl; i<=min(md-m+1, (ll)optr); i++) mx=max(mx, {s.query(i, md), i});
    ans=max(ans, mx.first);
    //cout<<"here "<<md<<' '<<mx.first<<' '<<mx.second<<'\n';
    solve(l, md-1, optl, mx.second);
    solve(md+1, r, mx.second, optr);
} 

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=1; i<=n; i++) cin>>c[i].v>>c[i].c, mp[c[i].v]=0;
    sort(c+1, c+n+1);
    for (auto &[x, y]:mp) y=++cnt;
    s.build(1, n, s.rt[0]);
    for (int i=1; i<=n; i++) c[i].idx=mp[c[i].v];
    for (int i=1; i<=n; i++) s.update(1, n, s.rt[i], s.rt[i-1], c[i].idx, c[i].v);
    //for (int i=1; i<=n; i++) for (int j=i; j<=n; j++) cout<<"debug "<<i<<' '<<j<<' '<<s.query(i, j)<<'\n';
    solve(m, n, 1, n);
    cout<<ans;
}

Compilation message

cake3.cpp: In member function 'long long int persist::query(int, int)':
cake3.cpp:59:36: warning: division by zero [-Wdiv-by-zero]
   59 |         if (r-l+1<m) return cout<<1/0, -1e18;
      |                                   ~^~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6488 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Incorrect 2 ms 6492 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #2
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6488 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Incorrect 2 ms 6492 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #3
0 / 76.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6488 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Incorrect 2 ms 6492 KB Output isn't correct
18 Halted 0 ms 0 KB -