#include "boxes.h"
#include<bits/stdc++.h>
#define int long long
#define vi vector<int>
#define pii pair<int,int>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define f0r(i,n) for(int i = 0; i < n; i++)
#define FOR(i,k,n) for(int i = k; i < n; i++)
#define dout(x) cout<<x<<' '<<#x<<endl
#define dout2(x,y) cout<<x<<' '<<#x<<' '<<y<<' '<<#y<<endl
#define vout(v) cout<<#v<<": "; for(auto u : v)cout<<u<<' '; cout<<endl
using namespace std;
long long delivery(signed N, signed K, signed L, signed p[]) {
int ans = 0; f0r(i,N)ans+=min(p[i],L-p[i]); return ans;
}
