Submission #1213158

#	Time	Username	Problem	Language	Result	Execution time	Memory
1213158		Rawlat_vanak	Rotating Lines (APIO25_rotate)	C++20	5 / 100	1 ms	840 KiB

rotate

#include "rotate.h"
#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define speedIO ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//#define mod 1000000007
#define f first
#define s second
#define pii pair<int,int>
#define pb push_back

const int M=50000;

vector<int> final,bit;

int get(int n, int i){
	i++;
	int ans=0;
	while(i>0){
		ans+=bit[i];
		i-=i&(-i);

	}
	return ans;
}

void update(int n, int i, int x){
	i++;
	while(i<=n){
		bit[i]+=x;
		i+=i&(-i);
	}
}



void energy(int n, vector<int> v){
	vector<pii> w(n);
	for(int i=0;i<n;i++){
		w[i]={v[i],i};
	}
	sort(w.begin(),w.end());
	set<pair<pii,int>> a;
	for(int i=0;i<n;i++){
		a.insert({{w[i].f,i},w[i].s});
	}
	//will work with w, w[i].s is the og index.
	// a.f.f is value, a.f.s is the sorted index and a.s is the og index.
	int idx=0;
	vector<int> marked(n,0);
	bit.resize(n+1,0);
	for(int i=1;i<=n;i++){
		bit[i]=i&(-i);
	}
	while(idx<n){
		if(marked[idx]){
			idx++;
			continue;
		}
		marked[idx]=1;
		update(n,idx,-1);
		if(w[idx].f<M/2){
			auto it=a.upper_bound({{w[idx].f+M/2,1e9},1e9});
			it--; // j st w[j]<=w[i]+M/2<w[j+1]
			auto element=*it;
			if(get(n,element.f.s)-get(n,idx)>=n/2){
				rotate({w[idx].s},w[element.f.s].f+M/2-w[idx].f);

				a.erase({{w[idx].f,idx},w[idx].s});
				w[idx].f=(w[element.f.s].f+M/2)%M;
				//a.insert({{w[idx].f,idx},w[idx].s});
				update(n,element.f.s,marked[element.f.s]-1);
				marked[element.f.s]=1;
				a.erase({{w[element.f.s].f,element.f.s},w[element.f.s].s});

			}else{
				rotate({w[idx].s},w[(element.f.s+1)%n].f+M/2-w[idx].f);

				a.erase({{w[idx].f,idx},w[idx].s});
				w[idx].f=(w[(element.f.s+1)%n].f+M/2)%M;
				//a.insert({{w[idx].f,idx},w[idx].s});
				update(n,(element.f.s+1)%n,marked[(element.f.s+1)%n]-1);
				marked[(element.f.s+1)%n]=1;
				a.erase({{w[(element.f.s+1)%n].f,(element.f.s+1)%n},w[(element.f.s+1)%n].s});
			}
		}else{
			auto it=a.lower_bound({{w[idx].f-M/2,0},0});
			//it--; // j st w[j-1]<w[i]+M/2<=w[j]
			auto element=*it;
			if(get(n,idx)-get(n,element.f.s)>=n/2){
				rotate({w[idx].s},w[element.f.s].f+M/2-w[idx].f);

				a.erase({{w[idx].f,idx},w[idx].s});
				w[idx].f=(w[element.f.s].f+M/2)%M;
				//a.insert({{w[idx].f,idx},w[idx].s});
				update(n,element.f.s,marked[element.f.s]-1);
				marked[element.f.s]=1;
				a.erase({{w[element.f.s].f,element.f.s},w[element.f.s].s});
				cout<<idx<<" pairs with "<<element.f.s<<'\n';
			}else{
				int lmao=(element.f.s-1)%n;
				if(lmao<0) lmao+=n;
				rotate({w[idx].s},w[lmao].f+M/2-w[idx].f);

				a.erase({{w[idx].f,idx},w[idx].s});
				
				//cout<<lmao<<" lmao\n";
				w[idx].f=(w[lmao].f+M/2)%M;
				//a.insert({{w[idx].f,idx},w[idx].s});
				update(n,lmao,marked[lmao]-1);
				marked[lmao]=1;
				a.erase({{w[lmao].f,lmao},w[lmao].s});
				//cout<<idx<<" pairs with "<<lmao<<'\n';
			}
		}


		idx++;
	

	}

	
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 8
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 26