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 <bits/stdc++.h>
//#include "boxes.h"
using namespace std;
typedef long long ll;
typedef vector<int> vi;
ll delivery(int n, int k, int L, int positions[]){
ll l=(ll)L;
if(k==1){
ll ans=0;
for(int i=0; i<n; i++){
ans+=min(positions[i],L-positions[i])*2;
}
return ans;
}
if(k==n){
// vi pos;
// set<ll> z;
// for(int i=0; i<n; i++){
// int size=(int)z.size();
// z.insert(positions[i]);
// if((int)z.size()!=size){
// pos.push_back(positions[i]);
// }
// }
// int x=-1,y=-1;
// for(int i=0; i<pos.size(); i++){
// if(pos[i]*2>=l) break;
// x = i;
// }
// for(int i=pos.size()-1; i>=0; i--){
// if((l-pos[i])*2>l) break;
// y = i;
// }
// long long ans=0;
// if(x!=-1) ans+=pos[x]*2;
// if(y!=-1) ans+=(n-pos[y])*2;
// ans=min(l, ans);
// if(x==-1 && y==-1) ans=l;
return l;
}
return 0;
}
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