#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef tuple <ll,ll,ll> plll;
typedef vector <plll> vplll;
typedef pair <ll,ll> pll;
typedef vector <ll> vll;
typedef vector <pll> vpll;
typedef vector <vector <pll>> vvpll;
typedef vector <vector <ll>> vvll;
typedef vector <bool> vb;
typedef vector <vector <bool>> vvb;
#define loop(i, s, e) for (ll i = (s); i < (e); ++i)
#define loopr(i, e, s) for (ll i = (e)-1; i >= (s); --i)
#define all(a) a.begin(), a.end()
const ll inf = 1e9 + 7;
ll n,k,l;
vll p;
long long delivery(int N, int K, int L, int P[]) {
n=N,k=K,l=L;
p.resize(n);
ll mx = 0;
ll ans = 0;
loop(i,0,n) {
p[i] = P[i];
if (p[i] > mx) {
mx = p[i];
ans = p[i] + min(p[i], l-p[i]);
}
}
return ans;
}
