Submission #123147

#	Time	Username	Problem	Language	Result	Execution time	Memory
123147		MvC	Cake 3 (JOI19_cake3)	C++11	0 / 100	8 ms	420 KiB

cake3

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
//#include "rail.h"
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=2e5+50;
const int mod=1e9+7;
using namespace std;
int n,m,i,j,t;
pair<ll,ll>a[nmax];
vector<pair<ll,ll> >vc;
ll rs,ans,mx,mn;
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=1;i<=n;i++)cin>>a[i].sc>>a[i].fr;
	sort(a+1,a+n+1);
	for(i=1;i<=n;i++)
	{
		for(j=i+m-1;j<=n;j++)
		{
			vc.clear(),rs=0;
			for(t=i;t<=j;t++)vc.pb(mkp(a[t].sc,a[t].fr));
			sort(vc.begin(),vc.end());
			mx=0,mn=llinf;
			for(t=(int)vc.size()-1;t>=(int)vc.size()-m;t--)
			{
				rs+=vc[t].fr;
				mn=min(mn,vc[t].sc);
				mx=max(mx,vc[t].sc);
			}
			//rs-=2LL*(mx-mn);
			rs-=2LL*(a[j].fr-a[i].fr);
			ans=max(ans,rs);
		}
	}
	cout<<ans<<endl;
    return 0;
}

Compilation message (stderr)

cake3.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
cake3.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")

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