This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "boxes.h"
#include<bits/stdc++.h>
using namespace std;
class pont{
public:
int elotte;
int utana;
int hely;
long long vissza;
long long elolrol;
long long hatulrol;
};
vector<pont> p;
long long delivery(int n, int k, int l, int in[]) {
p.resize(n+1);
for(int i=0;i<=n;i++){
p[i].elotte = (i-1+n+1)%(n+1);
p[i].utana = (i+1)%(n+1);
}
p[0].hely=0;
for(int i=1;i<=n;i++){
p[i].hely=in[i-1];
}
for(int i=1;i<=n;i++){
p[i].vissza= min (
p[i].hely, l-p[i].hely
);
p[i].elolrol=p[max(i-k,0)].elolrol+p[i].hely+p[i].vissza;
}
if(k==1){
long long ossz=0;
for(int i=1;i<=n;i++){
ossz+=p[i].vissza;
}
return ossz*2;
}
p[0].hely=l;
for(int i=n;i>0;i--){
int mit=i+k;
if(i+k > n){
mit=0;
}
p[i].hatulrol=p[mit].hatulrol+l-p[i].hely+p[i].vissza;
}
long long mn= LLONG_MAX;
for(int i=0;i<=n;i++){
mn = min(p[i].elolrol+p[p[i].utana].hatulrol,mn);
}
return mn;
}
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