Submission #503512

#	Time	Username	Problem	Language	Result	Execution time	Memory
503512		Koosha_mv	Candies (JOI18_candies)	C++14	0 / 100	2 ms	488 KiB

candies

#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#define int ll

const int N=1e6+99,S=2;

int n,t,ans,a[N],ps[N][S],L[N],R[N];
set<pair<int,pair<int,int> > > s;

void Add(int l,int r){
	if(r>n || l<1) return ;
	int res=(ps[r][1]-ps[l-1][0])-(ps[r][0]-ps[l-1][1]);
	s.insert({res,{l,r}});
}
void del(int l,int r){
	if(r>n || l<1) return ;
	int res=(ps[r][1]-ps[l-1][0])-(ps[r][0]-ps[l-1][1]);
	s.erase({res,{l,r}});
}

main(){
	cin>>n;
	f(i,1,n+1){
		L[i]=R[i]=i;
		cin>>a[i];
		s.insert({a[i],{L[i],R[i]}});
	}
	f(i,1,n+1){
		ps[i][0]=ps[i-1][1];
		ps[i][1]=ps[i-1][0]+a[i];
	}
	f(t,0,(n+1)/2){
		pair<int,pair<int,int> > p=*s.rbegin();
		int l=p.S.F-1,r=p.S.S+1;
		//cout<<l<<" "<<r<<endl;
		s.erase(p);
		ans+=p.F;
		if(L[l]){
			int copy=l;
			del(L[l],l);
			l=L[l];
			L[copy]=0,R[copy]=0;
			R[l]=r;
		}
		if(R[r]){
			int copy=r;
			del(r,R[r]);
			r=R[r];
			L[copy]=0,R[copy]=0;
			L[r]=l;
		}
		Add(l,r);
		//cout<<l<<" -> "<<r<<endl;
		cout<<ans<<" ";	
	}
}
/*
7
1 0 1 0 1 0 1
*/

Compilation message (stderr)

candies.cpp:39:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   39 | main(){
      | ^~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 92