結果
| 問題 | 
                            No.798 コレクション
                             | 
                    
| コンテスト | |
| ユーザー | 
                             | 
                    
| 提出日時 | 2024-06-21 16:57:16 | 
| 言語 | C++23  (gcc 13.3.0 + boost 1.87.0)  | 
                    
| 結果 | 
                             
                                AC
                                 
                             
                            
                         | 
                    
| 実行時間 | 10 ms / 2,000 ms | 
| コード長 | 2,895 bytes | 
| コンパイル時間 | 2,131 ms | 
| コンパイル使用メモリ | 155,792 KB | 
| 実行使用メモリ | 6,944 KB | 
| 最終ジャッジ日時 | 2024-06-21 16:57:21 | 
| 合計ジャッジ時間 | 3,829 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge5 / judge2 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 23 | 
ソースコード
#include <algorithm>
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <numeric>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <functional>
#include <iomanip>
using namespace std;
using ll = long long;
class range {private: struct I{int x;int operator*(){return x;}bool operator!=(I& lhs){return x<lhs.x;}void operator++(){++x;}};I i,n;
public:range(int n_):i({0}),n({n_}){}range(int i_,int n_):i({i_}),n({n_}){}I& begin(){return i;}I& end(){return n;}};
template<typename T, typename U> ostream& operator<<(ostream& os, const pair<T, U>& p){ return os << "{" << p.first << ", " << p.second << "}"; }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& obj) { os << "{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> ostream& operator<<(ostream& os, const set<T>& obj) { os << "set{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& obj) { os << "map{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> void take(vector<T>& vec, int n) { vec.resize(n); for (int i = 0; i < n; ++i) cin >> vec[i]; }
#ifdef ONLINE_JUDGE
#define dump(expr) ;
#else
#define dump(expr) { cerr << "\033[33m#L" << __LINE__ << ": " << expr << "\033[39m" << endl; }
#endif
namespace solver {
template<typename T1, typename T2> struct In2 {
  T1 a; T2 b;
  friend std::istream& operator>>(std::istream& is, In2& obj) { T1 t1; T2 t2; is >> t1 >> t2; obj = {t1, t2}; return is; }
};
template<typename T1, typename T2, typename T3> struct In3 {
  T1 a; T2 b; T3 c;
  friend std::istream& operator>>(std::istream& is, In3& obj) { T1 t1; T2 t2; T3 t3; is >> t1 >> t2 >> t3; obj = {t1, t2, t3}; return is; }
};
ll n;
vector<In2<ll, ll>> vs;
void read() {
  cin >> n;
  take(vs, n);
}
using RetType = ll;
RetType run() {
  vector<pair<ll, ll>> items(n);
  for (int i : range(n)) items[i] = {vs[i].b, vs[i].a}; // sort by b
  ranges::sort(items);
  ranges::reverse(items);
  const ll INF = 1LL << 60;
  vector<ll> dp(n + 1, INF);
  dp[0] = 0;
  for (auto item : items) {
    ll a = item.second;
    ll b = item.first;
    vector<ll> next(n + 1, INF);
    next[0] = 0;
    for (ll m : range(1, n + 1)) {
      next[m] = min(dp[m], dp[m - 1] + a + (m - 1) * b);
    }
    dp = next;
    dump(dp);
  }
  ll buying = n - n / 3;
  return dp[buying];
}
}  // namespace
template <typename F>
void run(F f) { if constexpr (std::is_same_v<decltype(f()), void>) f(); else cout << f() << endl; }
int main(int argc, char** argv) {
  cerr << fixed << setprecision(12);
  cout << fixed << setprecision(12);
  int testcase = 1;
  if (argc > 1) testcase = atoi(argv[1]);
  while (testcase--) {
    solver::read();
  }
  run(solver::run);
}