結果

問題 No.1606 Stuffed Animals Keeper
ユーザー stoqstoq
提出日時 2021-08-03 05:58:01
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 70 ms / 3,000 ms
コード長 3,638 bytes
コンパイル時間 3,619 ms
コンパイル使用メモリ 210,704 KB
実行使用メモリ 101,632 KB
最終ジャッジ日時 2024-09-16 14:53:30
合計ジャッジ時間 6,293 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
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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 47 ms
101,504 KB
testcase_01 AC 47 ms
101,376 KB
testcase_02 AC 47 ms
101,376 KB
testcase_03 AC 53 ms
101,504 KB
testcase_04 AC 64 ms
101,632 KB
testcase_05 AC 66 ms
101,504 KB
testcase_06 AC 68 ms
101,376 KB
testcase_07 AC 70 ms
101,504 KB
testcase_08 AC 70 ms
101,632 KB
testcase_09 AC 68 ms
101,504 KB
testcase_10 AC 66 ms
101,376 KB
testcase_11 AC 67 ms
101,376 KB
testcase_12 AC 69 ms
101,504 KB
testcase_13 AC 66 ms
101,376 KB
testcase_14 AC 58 ms
101,504 KB
testcase_15 AC 49 ms
101,452 KB
testcase_16 AC 57 ms
101,532 KB
testcase_17 AC 55 ms
101,504 KB
testcase_18 AC 50 ms
101,632 KB
testcase_19 AC 50 ms
101,504 KB
testcase_20 AC 49 ms
101,556 KB
testcase_21 AC 42 ms
101,376 KB
testcase_22 AC 45 ms
101,376 KB
testcase_23 AC 43 ms
101,376 KB
testcase_24 AC 43 ms
101,376 KB
testcase_25 AC 43 ms
101,388 KB
testcase_26 AC 42 ms
101,376 KB
testcase_27 AC 41 ms
101,376 KB
testcase_28 AC 41 ms
101,504 KB
testcase_29 AC 42 ms
101,392 KB
testcase_30 AC 41 ms
101,428 KB
testcase_31 AC 41 ms
101,368 KB
testcase_32 AC 40 ms
101,376 KB
testcase_33 AC 42 ms
101,392 KB
testcase_34 AC 42 ms
101,376 KB
testcase_35 AC 41 ms
101,376 KB
testcase_36 AC 42 ms
101,504 KB
testcase_37 AC 42 ms
101,376 KB
testcase_38 AC 43 ms
101,376 KB
testcase_39 AC 42 ms
101,420 KB
testcase_40 AC 42 ms
101,376 KB
testcase_41 AC 42 ms
101,376 KB
testcase_42 AC 41 ms
101,504 KB
testcase_43 AC 55 ms
101,580 KB
testcase_44 AC 53 ms
101,504 KB
testcase_45 AC 53 ms
101,504 KB
testcase_46 AC 53 ms
101,504 KB
testcase_47 AC 55 ms
101,476 KB
testcase_48 AC 40 ms
101,376 KB
testcase_49 AC 41 ms
101,504 KB
testcase_50 AC 41 ms
101,376 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#define MOD_TYPE 2

#pragma region Macros

#include <bits/stdc++.h>
using namespace std;

#if 1
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif

#if 0
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/tag_and_trait.hpp>
#include <ext/rope>
using namespace __gnu_pbds;
using namespace __gnu_cxx;
template <typename T>
using extset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#endif

#if 0
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using Int = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
#endif

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 T>
using smaller_queue = priority_queue<T, vector<T>, greater<T>>;

constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353);
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
constexpr ld PI = acos(-1.0);
constexpr ld EPS = 1e-7;
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 all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";

struct io_init
{
  io_init()
  {
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << setprecision(30) << setiosflags(ios::fixed);
  };
} io_init;
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

random_device seed_gen;
mt19937_64 engine(seed_gen());

// --------------------------------------

int dp[5010][5010];

void solve()
{
  int n;
  cin >> n;
  int sum0 = 0;
  vector<int> a(n);
  rep(i, n) cin >> a[i];
  vector<pii> v;
  int len = 0, zero = 0;
  rep(i, n)
  {
    if (a[i] == 0)
      sum0++;
    if (a[i] == 2)
    {
      if (len == 0)
        continue;
      v.push_back({len, zero});
      len = zero = 0;
    }
    else
    {
      len++;
      if (a[i] == 0)
        zero++;
    }
  }
  if (len > 0)
    v.push_back({len, zero});

  int m = v.size();
  Fill(dp, INF);
  dp[0][0] = 0;
  rep(i, m)
  {
    auto [l, z] = v[i];
    rep(j, n + 1)
    {
      // 0 で埋める
      chmin(dp[i + 1][j + l], dp[i][j] + l - z);
      // 1 で埋める
      chmin(dp[i + 1][j], dp[i][j] + z);
    }
  }
  int ans = dp[m][sum0];
  cout << (ans == INF ? -1 : ans / 2) << "\n";
}

int main()
{
  solve();
}
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