Submission #794573

#	Time	Username	Problem	Language	Result	Execution time	Memory
794573		firewater	Wiring (IOI17_wiring)	C++14	0 / 100	1 ms	212 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)
{
	ll m1,m2,sum1,sum2;
	m1=num[r]-num[l-1];
	m2=r-l+1-m1;
	if(a[l].sn==2)swap(m1,m2);
	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));


	// m1=r.size();
	// m2=b.size();
	// ll sum1=0,sum2=0;
	// for(ll i=0;i<m1;++i)
	// 	sum1+=r[i];
	// for(ll i=0;i<m2;++i)
	// 	sum2+=b[i];
	// return ((sum2-b[0]*m2)+(r[m1-1]*m1-sum1)+(b[0]-r[m1-1])*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;
	}
	for(ll i=1;i<=n;++i)
		f[i]=100000000000000000ll;
	printf("%lld\n",f[0]);
	f[0]=0;
	// for(ll i=n;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));
	// 		printf("%lld %lld %lld\n",j,i,f[i]);
	// 		j--;
	// 	}
	// }
	// return f[n];
	return ask(1,n);
}

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