結果

問題 No.910 素数部分列
ユーザー fumiphysfumiphys
提出日時 2019-10-18 22:10:05
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 3,852 bytes
コンパイル時間 1,591 ms
コンパイル使用メモリ 171,840 KB
実行使用メモリ 6,948 KB
最終ジャッジ日時 2024-06-25 17:03:57
合計ジャッジ時間 2,953 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge5
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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
6,816 KB
testcase_01 AC 2 ms
6,944 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 1 ms
6,940 KB
testcase_04 AC 2 ms
6,944 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 1 ms
6,940 KB
testcase_07 WA -
testcase_08 AC 2 ms
6,940 KB
testcase_09 AC 1 ms
6,940 KB
testcase_10 WA -
testcase_11 AC 1 ms
6,940 KB
testcase_12 AC 2 ms
6,944 KB
testcase_13 AC 2 ms
6,944 KB
testcase_14 AC 2 ms
6,944 KB
testcase_15 WA -
testcase_16 WA -
testcase_17 AC 2 ms
6,940 KB
testcase_18 WA -
testcase_19 AC 2 ms
6,940 KB
testcase_20 WA -
testcase_21 WA -
testcase_22 AC 2 ms
6,944 KB
testcase_23 WA -
testcase_24 WA -
testcase_25 WA -
testcase_26 WA -
testcase_27 WA -
testcase_28 WA -
testcase_29 WA -
testcase_30 WA -
testcase_31 WA -
testcase_32 WA -
testcase_33 WA -
testcase_34 WA -
testcase_35 WA -
testcase_36 WA -
testcase_37 WA -
testcase_38 WA -
testcase_39 AC 5 ms
6,940 KB
testcase_40 AC 5 ms
6,944 KB
testcase_41 AC 5 ms
6,944 KB
testcase_42 AC 5 ms
6,944 KB
testcase_43 AC 5 ms
6,940 KB
testcase_44 AC 6 ms
6,940 KB
testcase_45 AC 5 ms
6,940 KB
testcase_46 AC 5 ms
6,940 KB
testcase_47 AC 5 ms
6,940 KB
testcase_48 AC 3 ms
6,940 KB
testcase_49 AC 3 ms
6,940 KB
testcase_50 AC 4 ms
6,940 KB
testcase_51 AC 3 ms
6,940 KB
testcase_52 AC 4 ms
6,940 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 # 

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

// macros
#define pb emplace_back
#define mk make_pair
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define rep(i, n) FOR(i, 0, n)
#define rrep(i, n) for(int i=((int)(n)-1);i>=0;i--)
#define irep(itr, st) for(auto itr = (st).begin(); itr != (st).end(); ++itr)
#define irrep(itr, st) for(auto itr = (st).rbegin(); itr != (st).rend(); ++itr)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end())
#define bit(n) (1LL<<(n))
// functions
template <class T>bool chmax(T &a, const T &b){if(a < b){a = b; return 1;} return 0;}
template <class T>bool chmin(T &a, const T &b){if(a > b){a = b; return 1;} return 0;}
template <typename T> istream &operator>>(istream &is, vector<T> &vec){for(auto &v: vec)is >> v; return is;}
template <typename T> ostream &operator<<(ostream &os, const vector<T>& vec){for(int i = 0; i < vec.size(); i++){ os << vec[i]; if(i + 1 != vec.size())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const set<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const unordered_set<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const multiset<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T>& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;}
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p){os << p.first << " " << p.second; return os;}
template <typename T1, typename T2> ostream &operator<<(ostream &os, const map<T1, T2> &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;}
template <typename T1, typename T2> ostream &operator<<(ostream &os, const unordered_map<T1, T2> &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;}
//  types
using ll = long long int;
using P = pair<int, int>;
// constants
const int inf = 1e9;
const ll linf = 1LL << 50;
const double EPS = 1e-10;
const int mod = 1000000007;
const int dx[4] = {-1, 0, 1, 0};
const int dy[4] = {0, -1, 0, 1};
// io
struct fast_io{
  fast_io(){ios_base::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(20);}
} fast_io_;


int main(int argc, char const* argv[])
{
  int n; cin >> n;
  string s; cin >> s;
  int res = 0;
  string t = "";
  rep(i, sz(s)){
      if(s[i] != '1' && s[i] != '9'){
          ++res;
      }else{
          t += s[i];
      }
  }
  vector<bool> used(sz(t), false);
  for(int i = 0, j = sz(t) - 1; i < sz(t);){
      while(i < j && t[j] == '1')j--;
      while(i < j && t[i] == '9')i++;
      if(i >= j)break;
      used[i] = true;
      used[j] = true;
      ++res;
      i++; j--;
  }
  for(int i = 0, j = sz(t) - 1; i < sz(t); ){
      while(i < j && (used[j] || t[j] == '9'))j--;
      while(i < j && (used[i] || t[i] == '1'))i++;
      int idx = i;
      i++;
      while(i < j && (used[i] || t[i] == '1'))i++;
      if(i >= j)break;
      used[i] = true;
      used[idx] = true;
      used[j] = true;
      ++res;
      i++;
      j--;
  }
  int cnt = 0;
  rep(i, sz(t)){
      if(t[i] == '1' && !used[i])cnt++;
  }
  res += cnt / 2;
  cout << res << endl;
  return 0;
}
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