#include "boxes.h"
#include<bits/stdc++.h>
using namespace std;
long long delivery(int N, int K, int L, int p[]) {
if (K == 1){
long long ans = 0;
for (int i = 0;i<N;++i){
ans +=min(p[i],L - p[i]) * 2;
}
return ans;
}
else if (K == N){
long long ans = min({L,(L - p[0]) * 2,p[N - 1] * 2});
for (int i = 0;i<N - 1;++i){
ans = min(ans,(long long)p[i] * 2 + (L - p[i + 1]) * 2);
}
return ans;
}
/*map<int,int>clock_nxt,anti_nxt,cnts;
sort(p,p + N);
map<int,set<int,int>>remain;
int cur = 0;
for (int i = 0;i<n;++i){
clock_nxt[cur] = p[i];
cnts[p[i]]++;
cur = p[i];
}
clock_nxt[cur] = 0;
cur = 0;
for (int i = n - 1;i>=0;--i){
anti_nxt[cur] = p[i];
cur = p[i];
}
anti_nxt[cur] = 0;
int ans = 0;
while(true){
int temp1 = clock_nxt[0];
int temp2 = anti_nxt[0];
if (temp1 < temp2){
int times = (cnt[temp1] + K - 1) / K;
cnt[temp1]%=K;
remain[clock_nxt[temp1]].push_back({});
ans+=times * (temp1);
clock_nxt[0] = clock[clock_nxt[0]];
}
else{
int times = cnt[temp2] / K;
cnt[temp2]%=K;
ans+=times * temp2;
}
}
*/
return 0;
}
