Submission #391208

#	Time	Username	Problem	Language	Result	Execution time	Memory
391208		nathanlee726	Candies (JOI18_candies)	C++14	100 / 100	143 ms	12524 KiB

candies

//#include<i_am_noob_orz>
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
#define ll long long
#define int ll
#define ull unsigned long long
#define pii pair<int,int>
#define X first
#define Y second
#define mod ((ll)1e9+7)
#define pb push_back
#define mp make_pair
#define abs(x) ((x)>0?(x):(-(x)))
#define F(n) Fi(i,n)
#define Fi(i,n) Fl(i,0,n)
#define Fl(i,l,n) for(int i=l;i<n;i++)
#define memres(a) memset(a,0,sizeof(a))
#define all(a) a.begin(),a.end()
#define sz(a) ((int)a.size())
#define ceiling(a,b) (((a)+(b)-1)/(b))
#define endl '\n'
#define bit_count(x) __builtin_popcountll((x))
#define ykh mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define jimmy_is_kind false
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> rbtree;
 
//#define LOCAL
#ifdef LOCAL
#define bug(...) cerr<<"#"<<__LINE__<<' '<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do(T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T && x, S&&...y) {cerr<<x<<", "; _do(y...);}
#define IOS()
#else
#define IOS() ios_base::sync_with_stdio(0), cin.tie(0)
#define endl '\n'
#define bug(...)
#endif
 
int add(int a,int b){return(a+b>=mod?a+b-mod:a+b);}
int sub(int a,int b){return(a<b?a+mod-b:a-b);}
int po(int a,int b){
	if(b==0)return 1;
	if(b==1)return(a%mod);
	int tem=po(a,b/2);
	if(b&1)return(((tem*tem)%mod)*a)%mod;
	else return(tem*tem)%mod; 
}
int GCD(int a,int b){
	int x=0;
	int ra,rb;
	while(a&&b){
		if(((a&1)==0)&&((b&1)==0)){
			a>>=1,b>>=1,x++;
		}
		else if((a^b)&1){
			if(a&1)b>>=1;
			else a>>=1;
		}
		else{
			ra=abs(a-b),rb=min(a,b);
			a=ra,b=rb;
		}
	}
	return max(a,b)<<x;
}
int gcd(int a,int b){if(b==0)return a;return gcd(b,a%b);}
int a[200010],pre[200010],nxt[200010],o[200010];
priority_queue<pii,vector<pii>,less<pii> >pq;
signed main(){
	IOS();
	int n;
	cin>>n;
	F(n)cin>>a[i];
	a[n]=-1e18;
	F(n+1)pre[i]=i-1,nxt[i]=i+1;
	pre[0]=n,nxt[n]=0;
	F(n+1)pq.push({a[i],i});
	int ind=0,ans=0;
	while(1){
		pii pi=pq.top();
		pq.pop();
		if(pre[nxt[pi.Y]]!=pi.Y)continue;
		ans+=pi.X,ind++;
		o[ind]=max(o[ind],ans);
		bug(ind,ans,pre[pi.Y],nxt[pi.Y]);
		if((pre[pi.Y]==nxt[pi.Y])||((pre[pi.Y]+1)%(n+1)==nxt[pi.Y]))break;
		pi.X=(a[pre[pi.Y]]+a[nxt[pi.Y]]-pi.X);
		a[pi.Y]=pi.X;
		pre[pi.Y]=pre[pre[pi.Y]],nxt[pre[pi.Y]]=pi.Y;
		nxt[pi.Y]=nxt[nxt[pi.Y]],pre[nxt[pi.Y]]=pi.Y;
		pq.push(pi);
	} 
	F(ceiling(n,2))cout<<o[i+1]<<endl;
	return 0;
}

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