Submission #293607

#	Time	Username	Problem	Language	Result	Execution time	Memory
293607		Dovran	Meetings (IOI18_meetings)	C++11	0 / 100	192 ms	2036 KiB

meetings

#include <bits/stdc++.h>
#include "meetings.h"
#define N 100009
#define LL 1000000009
#define pii pair <int, int>
#define ff first
#define ss second
#define sz size
#define pb push_back
#define ll long long

using namespace std;

int n, v[N];
pii t[4*N];

void bld(int nd, int l, int r){
	if(l==r){
		t[nd].ff=v[l];
		t[nd].ss=l;
		return;
	}
	
	int md=(l+r)/2;
	bld(nd*2, l, md);
	bld(nd*2+1, md+1, r);
	
	if(t[nd*2]<=t[nd*2+1])
		t[nd].ss=t[nd*2].ss;
	else
		t[nd].ss=t[nd*2+1].ss;
	
	t[nd].ff=max(t[nd*2].ff, t[nd*2+1].ff);
}

pii tap(int nd, int l, int r, int x, int y){
	if(l>=x and r<=y){
		return t[nd];
	}
	if(l>y or r<x){
		return {0, 0};
	}

	int md=(l+r)/2;
	return max(tap(nd*2, l, md, x, y), tap(nd*2+1, md+1, r, x, y));
		
}

std::vector<ll> minimum_costs(std::vector<int>H, std::vector<int>L, std::vector<int>R){
	n=H.sz();
	for(int i=0; i<n; i++)
		v[i]=H[i];
	bld(1, 0, n-1);
	vector<ll>e;
	for(int i=0; i<(int)L.size(); i++){
		int l=L[i], r=R[i];
		ll ans=0;
		while(r>l){
			int md=(l+r)/2;
			pii p=tap(1, 0, n-1, l, r);
			if(p.ss<md)
				r=md-1;
			else if(p.ss>md)
				l=md+1;
			else{
				int a=tap(1, 0, n-1, l, md-1).ss;
				int b=tap(1, 0, n-1, md+1, r).ss;
				if(a>=b)
					l=md+1;
				else
					r=md-1;
			}
			
		}
		for(int j=l; j<=r; j++)
			if(j<=l)
				ans+=tap(1, 0, n-1, j, l).ff;
			else
				ans+=tap(1, 0, n-1, l, j).ff;
		e.pb(ans);
	}
	return e;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40