이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
#include "boxes.h"
using namespace std;
//#define INF 1e18LL
#define MAX 1000005
#define xx first
#define yy second
#define pb push_back
#define mp make_pair
#define ull long long
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define nl '\n'
#define zai <<' '<<
#define all(a) a.begin(),a.end()
#define pc __builtin_popcount
#define debug(args...) cerr << #args << " = "; Dbg,args; cerr << nl;
struct Dbg { template<typename T> Dbg& operator,(const T& v) { cerr << v << ", "; return *this; } } Dbg;
template <typename T> ostream& operator<<(ostream& _o_, const vector<T>& _v_){
if(!_v_.empty()){_o_<<'[';copy(_v_.begin(),_v_.end(),ostream_iterator<T>(_o_,", "));_o_<<"\b\b]";}return _o_;}
typedef vector<int> vi;
typedef pair<int,int> ii;
typedef vector<ii> vii;
template<class C> void mini(C &_a, C _b) { _a = min(_a, _b); }
template<class C> void maxi(C &_a, C _b) { _a = max(_a, _b); }
ull dp[MAX][2];
const ull INF = 1e18;
ull delivery(int n, int k, int L, int pos[]){
ull ans = INF;
dp[0][0] = dp[n + 1][1] = 0;
for(int i = 1; i <= n; i++){
dp[i][0] = dp[max(0, i - k)][0] + min(pos[i - 1] * 2, L);
}
for(int i = n; i >= 1; i--){
dp[i][1] = dp[min(n + 1, i + k)][1] + min((L - pos[i - 1]) * 2, L);
}
for(int i = 0; i <= n; i++){
mini(ans, dp[i][0] + dp[i + 1][1]);
}
return ans;
}
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