結果

問題 No.1095 Smallest Kadomatsu Subsequence
ユーザー stoqstoq
提出日時 2020-07-04 03:40:53
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 119 ms / 2,000 ms
コード長 4,445 bytes
コンパイル時間 2,041 ms
コンパイル使用メモリ 212,492 KB
実行使用メモリ 18,300 KB
最終ジャッジ日時 2024-09-17 08:46:42
合計ジャッジ時間 4,552 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,812 KB
testcase_01 AC 2 ms
6,940 KB
testcase_02 AC 2 ms
6,940 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 1 ms
6,940 KB
testcase_05 AC 2 ms
6,944 KB
testcase_06 AC 2 ms
6,944 KB
testcase_07 AC 2 ms
6,944 KB
testcase_08 AC 1 ms
6,944 KB
testcase_09 AC 2 ms
6,944 KB
testcase_10 AC 2 ms
6,944 KB
testcase_11 AC 1 ms
6,944 KB
testcase_12 AC 2 ms
6,940 KB
testcase_13 AC 6 ms
6,944 KB
testcase_14 AC 6 ms
6,940 KB
testcase_15 AC 6 ms
6,944 KB
testcase_16 AC 5 ms
6,944 KB
testcase_17 AC 5 ms
6,940 KB
testcase_18 AC 5 ms
6,944 KB
testcase_19 AC 5 ms
6,940 KB
testcase_20 AC 5 ms
6,944 KB
testcase_21 AC 5 ms
6,944 KB
testcase_22 AC 6 ms
6,940 KB
testcase_23 AC 114 ms
17,888 KB
testcase_24 AC 103 ms
15,968 KB
testcase_25 AC 100 ms
14,676 KB
testcase_26 AC 102 ms
16,048 KB
testcase_27 AC 98 ms
14,744 KB
testcase_28 AC 98 ms
18,148 KB
testcase_29 AC 97 ms
18,088 KB
testcase_30 AC 116 ms
18,212 KB
testcase_31 AC 117 ms
18,300 KB
testcase_32 AC 119 ms
18,252 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function 'void solve()':
main.cpp:176:7: warning: 'mi' may be used uninitialized [-Wmaybe-uninitialized]
  176 |   REP(i, mi + 1, n)
      |       ^
main.cpp:163:18: note: 'mi' was declared here
  163 |   ll Min = LINF, mi;
      |                  ^~

ソースコード

diff # 

#define MOD_TYPE 1

#pragma region Macros
#include <bits/stdc++.h>
using namespace std;
/*
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using multiInt = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
*/
/*
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
*/
using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename Q_type>
using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>;

constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353);
//constexpr ll MOD = 1;
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
constexpr double PI = acos(-1.0);
constexpr double EPS = 1e-11;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};

#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define REPI(i, m, n) for (int i = m; i < (int)(n); ++i)
#define repi(i, n) REPI(i, 0, n)
#define MP make_pair
#define MT make_tuple
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define possible(n) cout << ((n) ? "possible" : "impossible") << "\n"
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n"
#define Yay(n) cout << ((n) ? "Yay!" : ":(") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";

inline void init_main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << setprecision(30) << setiosflags(ios::fixed);
}
template <typename T>
inline bool chmin(T &a, T b)
{
  if (a > b)
  {
    a = b;
    return true;
  }
  return false;
}
template <typename T>
inline bool chmax(T &a, T b)
{
  if (a < b)
  {
    a = b;
    return true;
  }
  return false;
}
inline ll CEIL(ll a, ll b)
{
  return (a + b - 1) / b;
}
template <typename A, size_t N, typename T>
inline void Fill(A (&array)[N], const T &val)
{
  fill((T *)array, (T *)(array + N), val);
}
template <typename T, typename U>
constexpr istream &operator>>(istream &is, pair<T, U> &p) noexcept
{
  is >> p.first >> p.second;
  return is;
}
template <typename T, typename U>
constexpr ostream &operator<<(ostream &os, pair<T, U> &p) noexcept
{
  os << p.first << " " << p.second;
  return os;
}
#pragma endregion

template <typename T>
class SegmentTree
{
private:
  using Fn = function<T(T, T)>;
  int N;
  vector<T> dat;
  T unit;
  Fn func;

public:
  SegmentTree() {}
  SegmentTree(int n_, Fn func_, T unit_) : func(func_), unit(unit_)
  {
    N = 1;
    while (N < n_)
      N *= 2;
    dat.assign(2 * N - 1, unit);
  }
  SegmentTree(const vector<T> &v, Fn func_, T unit_) : func(func_), unit(unit_)
  {
    N = 1;
    int sz = v.size();
    while (N < sz)
      N *= 2;
    dat.resize(2 * N - 1);
    for (int i = 0; i < N; ++i)
      dat[i + N - 1] = (i < sz ? v[i] : unit);
    for (int i = N - 2; i >= 0; --i)
      dat[i] = func(dat[i * 2 + 1], dat[i * 2 + 2]);
  }

  void update(int k, T a)
  {
    k += N - 1;
    dat[k] = a;
    while (k > 0)
    {
      k = (k - 1) / 2;
      dat[k] = func(dat[k * 2 + 1], dat[k * 2 + 2]);
    }
  }

  T get(int k) { return dat[k + N - 1]; }

  T query(int l, int r)
  {
    T vl = unit, vr = unit;
    for (l += (N - 1), r += (N - 1); l < r; l >>= 1, r >>= 1)
    {
      if ((l & 1) == 0)
        vl = func(vl, dat[l]);
      if ((r & 1) == 0)
        vr = func(vr, dat[--r]);
    }
    return func(vl, vr);
  }
};

void solve()
{
  ll n;
  cin >> n;
  vector<ll> a(n);
  rep(i, n) cin >> a[i];
  ll Min = LINF, mi;
  rep(i, n)
  {
    if (Min > a[i])
    {
      Min = a[i], mi = i;
    }
  }
  auto my_min = [](ll a, ll b) { return min(a, b); };
  SegmentTree<ll> sg(a, my_min, LINF);
  ll ans = LINF;
  // A
  set<ll> st;
  REP(i, mi + 1, n)
  {
    auto itr = st.upper_bound(a[i]);
    st.insert(a[i]);
    if (itr == st.end())
      continue;
    chmin(ans, Min + a[i] + *itr);
  }
  // C
  st.clear();
  for (int i = mi - 1; i >= 0; i--)
  {
    auto itr = st.upper_bound(a[i]);
    st.insert(a[i]);
    if (itr == st.end())
      continue;
    chmin(ans, Min + a[i] + *itr);
  }
  // B
  chmin(ans, Min + sg.query(0, mi) + sg.query(mi + 1, n));
  cout << (ans == LINF ? -1 : ans) << "\n";
}

int main()
{
  init_main();
  solve();
}
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