#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include"shortcut.h"
using namespace std;
typedef long long ll;
#define chmin(a,b) a=min(a,b)
#define chmax(a,b) a=max(a,b)
#define N 510
ll r[N],d[N],n,cost;
ll solve(ll p,ll q){
if(r[q]-r[p]<=cost)return 1e17;
ll x=-1e17;
for(int i=0;i<=p;i++){
chmax(x,r[p]-r[i]+d[i]);
}
ll y=-1e17;
for(int i=q;i<n;i++){
chmax(y,r[i]-r[q]+d[i]);
}
ll ans=x+y+cost;
for(int i=p+1;i<=q-1;i++){
chmax(ans,x+d[i]+min(r[i]-r[p],r[q]-r[i]+cost));
chmax(ans,y+d[i]+min(r[i]-r[p]+cost,r[q]-r[i]));
}
ll mik=1e17;
for(int i=0;i<=p;i++){
chmax(ans,r[i]+d[i]-mik);
chmin(mik,r[i]-d[i]);
}
mik=1e17;
for(int i=q;i<n;i++){
chmax(ans,r[i]+d[i]-mik);
chmin(mik,r[i]-d[i]);
}
if(p<q-1){
ll key=cost+r[q]-r[p];
vector<ll> rs,ds;
for(int k=0;k<=2;k++){
for(int i=p;i<=q;i++){
rs.push_back(r[i]-r[p]+k*key);
ds.push_back(d[i]);
}
}
int j=1;
deque<pair<ll,ll> > Q;
//for(int i=0;i<10;i++)cout<<rs[i]<<" "; cout<<endl;
for(int i=0;i<=q-p;i++){
while(!Q.empty()){
if(Q.front().second<=i)Q.pop_front();
else break;
}
for(;j<rs.size()&&(rs[j]-rs[i])*2LL<=key;j++){
while(!Q.empty()){
if(Q.back().first<=rs[j]+ds[j])Q.pop_back();
else break;
}
Q.push_back(make_pair(rs[j]+ds[j],j));
}
if(!Q.empty()){
if(Q.front.second==i)cout<<1/0<<endl;
chmax(ans,Q.front().first-rs[i]+ds[i]);
//cout<<p<<" "<<q<<" "<<i<<" "<<key<<":"<<Q.front().first-rs[i]+ds[i]<<" "<<j<<" "<<Q.front().second<<endl;
}
}
}/*
for(int i=p;i<=q;i++)for(int j=i+1;j<=q;j++){
ll mi=r[j]-r[i];
chmin(mi,abs(r[p]-r[i])+abs(r[q]-r[j])+cost);
mi+=d[i]+d[j];
chmax(ans,mi);
}*/
//cout<<"#"<<p<<" "<<q<<" "<<ans<<endl;
return ans;
}
ll find_shortcut(int nn,vector<int> l,vector<int> dd,int cc){
n=nn,cost=cc;
for(int i=0;i<n;i++)d[i]=dd[i];
r[0]=0;
for(int i=0;i<n-1;i++)r[i+1]=r[i]+l[i];
ll ans=-1e17;
for(int i=0;i<n;i++)for(int j=i+1;j<n;j++){
chmax(ans,r[j]-r[i]+d[i]+d[j]);
}
for(int p=0;p<n;p++)for(int q=p+1;q<n;q++){
chmin(ans,solve(p,q));
}
return ans;
}
Compilation message
shortcut.cpp: In function 'll solve(ll, ll)':
shortcut.cpp:56:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(;j<rs.size()&&(rs[j]-rs[i])*2LL<=key;j++){
~^~~~~~~~~~
shortcut.cpp:64:8: error: invalid use of member function 'std::deque<_Tp, _Alloc>::const_reference std::deque<_Tp, _Alloc>::front() const [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::deque<_Tp, _Alloc>::const_reference = const std::pair<long long int, long long int>&]' (did you forget the '()' ?)
if(Q.front.second==i)cout<<1/0<<endl;
~~^~~~~
shortcut.cpp:64:14: error: expected ')' before 'second'
if(Q.front.second==i)cout<<1/0<<endl;
^~~~~~
shortcut.cpp:64:31: warning: division by zero [-Wdiv-by-zero]
if(Q.front.second==i)cout<<1/0<<endl;
~^~
