Submission #875448

#	Time	Username	Problem	Language	Result	Execution time	Memory
875448		Denkata	Cake 3 (JOI19_cake3)	C++14	0 / 100	1 ms	2524 KiB

cake3

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 2e5+3;
ll i,j,p,q,n,m,k,v[maxn],c[maxn];
pair <ll,ll> inp[maxn];
set < pair <ll,int> > vals;
set < pair<ll,int> > :: iterator it;
ll sum = 0,sum_all=0;
bool fl = false;
int l,r;

void add(ll val,int ind)
{
    sum_all += val;
    if(vals.size()<m-2)
    {
        vals.insert({val,ind});

        if(vals.size()==m-2)
            fl = true,it = vals.begin(),sum = sum_all;
        return ;
    }
    if((*it).first>val)
        vals.insert({val,ind});//dano ne pravi problemi s it
    else //if((*it).first<=val)
    {
        sum -= (*it).first;
        sum += val;
        vals.insert({val,ind});
        it++;
    }
}
void rem(ll val,int ind)
{
    sum_all-=val;
    if(vals.size()<=m-2)
    {
        vals.erase({val,ind});
        sum = -1e18;
        fl = false;
        return ;
    }
    //dano ne pravi problemi s it
    if((*it).first>val)
    {
        vals.erase({val,ind});
    }
    else //if((*it).first<=val)
    {
        sum -= val;
        it--;
        vals.erase({val,ind});
        sum+=(*it).first;

    }

}
void activate(int ll,int rr)
{
    while(r<rr)
    {
        r++;
        add(v[r],r);
    }
    //cout<<l<<" "<<r<<" "<<sum<<endl;
    while(ll<l)
    {
        l--;
        add(v[l],l);
    }
    //cout<<l<<" "<<r<<" "<<sum<<endl;
    while(ll>l)
    {
        rem(v[l],l);
        l++;
    }
    //cout<<l<<" "<<r<<" "<<sum<<endl;
    while(rr<r)
    {
        rem(v[r],r);
        r--;
    }
    //cout<<l<<" "<<r<<" "<<sum<<endl;
    //cout<<l<<" "<<r<<" "<<sum<<endl;
}
ll overall = -1e18;
void solve(int l,int r,int optl,int optr)
{
    if(r<l)return;
    int mid = (l+r)/2;
    ll ans = -1e18;
    int pos = -1;
    for(int i=optl;i<=min(mid,optr);i++)
    {
        if(i+1<=mid-1)activate(i+1,mid-1);
        if(fl && i+1<=mid-1)
        {
            ll tek = v[i]+v[mid]+sum - 2*(c[mid] - c[i]);
         //   cout<<tek<<endl;
            if(tek>ans)
            {
                pos = i;
                ans = tek;
            }
        }
    }
    overall = max(overall,ans);
    if(pos==-1)
        solve(l,mid-1,optl,optr);
    else solve(l,mid-1,optl,pos);
    if(pos!=-1)
        solve(mid+1,r,pos,optr);
    else solve(mid+1,r,optl,optr);
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>n>>m;
    for(i=1;i<=n;i++)
    {
        cin>>inp[i].second>>inp[i].first;

    }
    //cout<<endl;
    sort(inp+1,inp+n+1);
    for(i=1;i<=n;i++)
    {
        v[i] = inp[i].second;
        c[i] = inp[i].first;
      //  cout<<v[i]<<" "<<c[i]<<endl;
    }
    sum_all = v[1];
    sum = -1e18;
    l=r=1;
    vals.insert({v[1],1});
    solve(1,n,1,n);
    cout<<overall<<endl;
    return 0;
}
/*
94 22
17729830 195028137
17729832 195028150
17729830 195028178
17729832 195028140
17729832 195028118
17729836 195028176
17729835 195028180
17729829 195028198
17729829 195028141
17729835 195028132
17729834 195028115
17729829 195028197
17729829 195028160
17729829 195028137
17729834 195028161
17729836 195028115
17729829 195028107
17729834 195028170
17729832 195028132
17729829 195028159
17729833 195028183
17729836 195028178
17729834 195028201
17729830 195028108
17729831 195028145
17729832 195028202
17729829 195028191
17729832 195028150
17729829 195028180
17729835 195028118
17729829 195028176
17729830 195028176
17729834 195028167
17729828 195028160
17729833 195028202
17729829 195028188
17729834 195028107
17729836 195028202
17729830 195028150
17729828 195028137
17729836 195028188
17729831 195028106
17729835 195028176
17729835 195028140
17729834 195028132
17729836 195028137
17729834 195028107
17729834 195028124
17729833 195028137
17729834 195028112
17729834 195028161
17729834 195028154
17729835 195028132
17729832 195028132
17729837 195028202
17729834 195028127
17729830 195028152
17729835 195028150
17729835 195028111
17729829 195028161
17729832 195028137
17729830 195028172
17729829 195028162
17729834 195028161
17729835 195028150
17729834 195028162
17729832 195028114
17729830 195028183
17729829 195028181
17729835 195028113
17729829 195028107
17729835 195028180
17729834 195028145
17729829 195028186
17729837 195028181
17729829 195028159
17729835 195028126
17729836 195028146
17729834 195028118
17729835 195028180
17729832 195028130
17729830 195028172
17729829 195028189
17729834 195028190
17729829 195028150
17729832 195028147
17729833 195028168
17729834 195028120
17729829 195028199
17729834 195028118
17729835 195028178
17729828 195028194
17729837 195028191
17729837 195028170

*/

Compilation message (stderr)

cake3.cpp: In function 'void add(ll, int)':
cake3.cpp:16:19: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   16 |     if(vals.size()<m-2)
      |        ~~~~~~~~~~~^~~~
cake3.cpp:20:23: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   20 |         if(vals.size()==m-2)
      |            ~~~~~~~~~~~^~~~~
cake3.cpp: In function 'void rem(ll, int)':
cake3.cpp:37:19: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   37 |     if(vals.size()<=m-2)
      |        ~~~~~~~~~~~^~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 19
• Subtask 3: 0 / 76