#681195 (C++17) No.1617 Palindrome Removal

• 問題: No.1617 Palindrome Removal
• ユーザー: ei1333333
• 提出日時: 2021-07-22 21:24:10
• 言語: C++17 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 39 ms / 2,000 ms
• コード長: 2,412 bytes
• コンパイル時間: 2,342 ms
• コンパイル使用メモリ: 206,200 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-07-17 16:13:28
• 合計ジャッジ時間: 3,266 ms
• ジャッジサーバーID （参考情報）: judge1 / judge3

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	11 ms; 5,248 KB
testcase_01	AC	12 ms; 5,376 KB
testcase_02	AC	13 ms; 5,376 KB
testcase_03	AC	12 ms; 5,376 KB
testcase_04	AC	16 ms; 5,376 KB
testcase_05	AC	13 ms; 5,376 KB
testcase_06	AC	39 ms; 5,376 KB
testcase_07	AC	25 ms; 5,376 KB
testcase_08	AC	2 ms; 5,376 KB
testcase_09	AC	2 ms; 5,376 KB
testcase_10	AC	33 ms; 5,376 KB
testcase_11	AC	28 ms; 5,376 KB
testcase_12	AC	35 ms; 5,376 KB
testcase_13	AC	35 ms; 5,376 KB
testcase_14	AC	2 ms; 5,376 KB
testcase_15	AC	2 ms; 5,376 KB
testcase_16	AC	2 ms; 5,376 KB
testcase_17	AC	2 ms; 5,376 KB
testcase_18	AC	2 ms; 5,376 KB
testcase_19	AC	2 ms; 5,376 KB
testcase_20	AC	2 ms; 5,376 KB
testcase_21	AC	2 ms; 5,376 KB
testcase_22	AC	2 ms; 5,376 KB
testcase_23	AC	2 ms; 5,376 KB

ソースコード

#include<bits/stdc++.h>

using namespace std;

using int64 = long long;
// const int mod = 1e9 + 7;
const int mod = 998244353;

const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;

struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;


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 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}

template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    os << v[i] << (i + 1 != v.size() ? " " : "");
  }
  return os;
}

template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
  for(T &in : v) is >> in;
  return is;
}

template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}

template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}

template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}

template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}

template< typename F >
struct FixPoint : F {
  FixPoint(F &&f) : F(forward< F >(f)) {}

  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};

template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}


int main() {
  string S;
  cin >> S;
  if(set< char >(begin(S), end(S)).size() == 1) {
    if(S.size() % 2 == 1) {
      cout << "-1\n";
    } else {
      cout << "0\n";
    }
    return 0;
  }
  string T = {S};
  reverse(begin(T), end(T));
  if(S == T) {
    if(S.size() == 3) cout << "-1\n";
    else cout << S.size() - 2 << "\n";
  } else cout << S.size() << "\n";
}