Submission #794576

#	Time	Username	Problem	Language	Result	Execution time	Memory
794576		firewater	Wiring (IOI17_wiring)	C++14	0 / 100	1067 ms	10876 KiB

wiring

#include "wiring.h"
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include <cassert>
#define ll long long
#define mp make_pair
#define fs first
#define sn second
#define MX 202300
using namespace std;
ll n,sum[MX],num[MX],f[MX];
pair<ll,ll>a[MX];
 
ll ask(ll l,ll r)
{
	int m1,m2,sum1,sum2;
	m1=num[r]-num[l-1];
	m2=r-l+1-m1;
	sum1=sum[l+m1-1]-sum[l-1];
	sum2=sum[r]-sum[r-m2];
	return ((a[l+m1-1].fs*m1-sum1)+(sum2-a[r-m2+1].fs*m2)+(a[r-m2+1].fs-a[l+m1-1].fs)*max(m1,m2));
}
long long min_total_length(std::vector<int> r, std::vector<int> b) {
	ll m1=r.size(),m2=b.size();
	for(ll i=1;i<=m1;++i)
		a[i]=mp(r[i-1],1);
	for(ll i=1;i<=m2;++i)
		a[i+m1]=mp(b[i-1],2);
	n=m1+m2;
	sort(a+1,a+1+n);
	for(ll i=1;i<=n;++i){
		if(a[i].sn==1)num[i]=1;
		num[i]+=num[i-1];
		sum[i]=sum[i-1]+a[i].fs;
	}
	memset(f,0x7f,sizeof(f));
	f[0]=0;
	for(ll i=1;i<=n;++i){
		ll j=i-1,now=1;
		while(j>0){
			if(now==1&&a[j].sn==a[i].sn){
				j--;
				continue;
			}
			now=2;
			if(a[j].sn==a[i].sn)break;
			f[i]=min(f[i],min(f[j-1],f[j])+ask(j,i));
			j--;
		}
	}
	return f[n];
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45