結果
| 問題 | No.409 ダイエット |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-01-25 14:39:54 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,044 bytes |
| 記録 | |
| コンパイル時間 | 1,762 ms |
| コンパイル使用メモリ | 175,052 KB |
| 実行使用メモリ | 8,064 KB |
| 最終ジャッジ日時 | 2024-09-16 04:46:59 |
| 合計ジャッジ時間 | 7,141 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 79 WA * 13 |
ソースコード
#include <bits/stdc++.h>
#define FOR(v, a, b) for(int v = (a); v < (b); ++v)
#define FORE(v, a, b) for(int v = (a); v <= (b); ++v)
#define REP(v, n) FOR(v, 0, n)
#define REPE(v, n) FORE(v, 0, n)
#define REV(v, a, b) for(int v = (a); v >= (b); --v)
#define ALL(x) (x).begin(), (x).end()
#define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it)
#define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it)
#define EXIST(c,x) ((c).find(x) != (c).end())
#define LLI long long int
#define fst first
#define snd second
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_E
#define M_E 2.71828182845904523536
#endif
#ifdef DEBUG
#include <boost/core/demangle.hpp>
#define dump(x) cerr << "L" << __LINE__ << ": in " << __PRETTY_FUNCTION__ << " \e[32;1m" << boost::core::demangle(typeid(x).name()) << "\e[37m" << " " << (#x) << " = " << (x) << "\e[m" << endl;
#else
#define dump(x)
#endif
using namespace std;
template <typename T> using V = vector<T>;
template <typename T, typename U> using P = pair<T,U>;
template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;}
template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;}
template <typename T, typename U> istream& operator>>(istream &is, pair<T,U> &p){is >> p.first >> p.second; return is;}
template <typename Iter> ostream& out_container(ostream &os, Iter first, Iter last){
os << "{"; auto itr = first; while(itr != last){if(itr != first) os << ","; os << *itr; ++itr;} os << "}"; return os;
}
template <typename T> ostream& operator<<(ostream &os, const vector<T> &c){return out_container(os,ALL(c));}
template <typename T> ostream& operator<<(ostream &os, const deque<T> &c){return out_container(os,ALL(c));}
template <typename T> ostream& operator<<(ostream &os, const set<T> &c){return out_container(os,ALL(c));}
template <typename T> ostream& operator<<(ostream &os, const unordered_set<T> &c){return out_container(os,ALL(c));}
template <typename T, typename U> ostream& operator<<(ostream &os, const map<T,U> &c){return out_container(os,ALL(c));}
template <typename T, typename U> ostream& operator<<(ostream &os, const unordered_map<T,U> &c){return out_container(os,ALL(c));}
template <typename T, typename U> ostream& operator<<(ostream& os, const pair<T,U> &p){os << "(" << p.first << "," << p.second << ")"; return os;}
template <typename T> T& chmin(T &a, const T &b){return a = min(a,b);}
template <typename T> T& chmax(T &a, const T &b){return a = max(a,b);}
// 追加直線の傾きが単調減少、minクエリの値が単調増加
template <typename T> class ConvexHullTrick{
public:
deque<pair<T,T>> lines;
bool is_needless(pair<T,T> a, pair<T,T> b, pair<T,T> c){
return (a.snd-b.snd)*(a.fst-c.fst) >= (a.snd-c.snd)*(a.fst-b.fst);
}
void add(T a, T b){
if(!lines.empty()){
auto l = lines.back();
if(l.fst == a){
if(l.snd < b) return;
else lines.pop_back();
}
}
while(lines.size()>=2 && is_needless(make_pair(a,b), lines.back(), *(lines.end()-2))){
lines.pop_back();
}
lines.push_back(make_pair(a,b));
}
T apply(pair<T,T> f, T x){
return f.fst*x + f.snd;
}
T query(T x){
while(lines.size()>=2 && apply(lines[0],x)>apply(lines[1],x)){
lines.pop_front();
}
return apply(lines[0],x);
}
};
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
LLI N;
double A,B,W;
while(cin >> N >> A >> B >> W){
vector<double> D(N); cin >> D;
vector<double> dp(N);
ConvexHullTrick<double> cht;
dp[0] = W+D[0];
cht.add(-B/2,dp[0]+A*0+B*0*(0+1)/2);
FOR(i,1,N){
double t = cht.query(i);
dump(t);
dp[i] = D[i]-A*(i-1)+B*i*i/2+t;
chmin(dp[i], D[i]+W-A*i+B*i*(i+1)/2);
cht.add(-B*(2*i+1)/2,dp[i]+A*i+B*i*(i+1)/2);
}
dump(dp);
LLI ans = -A*(N-1)+B*N*N/2+cht.query(N);
chmin(ans, (LLI)(W-A*N+B*N*(N+1)/2));
cout << ans << endl;
}
return 0;
}