이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "wiring.h"
#include<bits/stdc++.h>
using namespace std;
#define sz(v) ((int)(v).size())
typedef long long lint;
typedef pair<int,int> pii;
int rec[200002][2],fow[200002][2];
int n,m;
lint D[200002],sum[200002];
vector<pii>V;
lint f(int p)
{
if(D[p]>=0)return D[p];
if(p==0)return D[p]=0;
D[p]=1e18;
if(fow[p][1-V[p].second]!=-1)D[p]=min(D[p],f(p-1)+V[fow[p][1-V[p].second]].first-V[p].first);
if(rec[p][1-V[p].second]!=-1)D[p]=min(D[p],f(p-1)+V[p].first-V[rec[p][1-V[p].second]].first);
int ind=rec[p][1-V[p].second];
if(ind!=-1)
{
int ind2=rec[ind][1-V[ind].second];
if(ind2==-1)ind2=0;
if(p-ind<=ind-ind2)
{
D[p]=min(D[p],f(ind-(p-ind))+sum[p]-sum[ind]-(sum[ind]-sum[ind-(p-ind)]));
}
}
return D[p];
}
lint min_total_length(vector<int> r, vector<int> b) {
lint ans=0;
n=sz(r),m=sz(b);
for(int i=0;i<n;i++)V.push_back({r[i],0});
for(int j=0;j<m;j++)V.push_back({b[j],1});
V.push_back({-1e9,0});
sort(V.begin(),V.end());
n=sz(V)-1;
rec[0][0]=rec[0][1]=-1;
sum[0]=0;
for(int i=1;i<=n;i++)
{
rec[i][0]=rec[i-1][0];
rec[i][1]=rec[i-1][1];
rec[i][V[i].second]=i;
sum[i]=sum[i-1]+V[i].first;
}
fow[n+1][0]=fow[n+1][1]=-1;
for(int i=n;i>=1;i--)
{
fow[i][0]=fow[i+1][0];
fow[i][1]=fow[i+1][1];
fow[i][V[i].second]=i;
}
memset(D,-1,sizeof(D));
ans=f(n);
//for(int i=1;i<=n;i++)for(int j=0;j<7;j++)printf("%d %d %lld %lld\n",i,j,D[i][j][0],D[i][j][1]);
return ans;
}
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