#1031191 (C++17(gcc12)) No.3000 Optimal Run Length Encoding

提出ソース

結果

問題	No.3000 Optimal Run Length Encoding
ユーザー	NyaanNyaan
提出日時	2024-12-13 23:27:27
言語	C++17(gcc12) (gcc 12.3.0 + boost 1.87.0)
結果	WA
実行時間	-
コード長	16,748 bytes
コンパイル時間	3,436 ms
コンパイル使用メモリ	282,236 KB
実行使用メモリ	292,788 KB
最終ジャッジ日時	2024-12-24 23:40:20
合計ジャッジ時間	110,685 ms
ジャッジサーバーID （参考情報）	judge4 / judge2

このコードへのチャレンジ
（要ログイン）

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 5,248 KB
testcase_01	AC	203 ms 5,248 KB
testcase_02	AC	203 ms 5,248 KB
testcase_03	AC	194 ms 5,248 KB
testcase_04	AC	197 ms 5,248 KB
testcase_05	AC	176 ms 5,248 KB
testcase_06	AC	185 ms 5,248 KB
testcase_07	AC	199 ms 5,248 KB
testcase_08	AC	189 ms 5,248 KB
testcase_09	AC	180 ms 5,248 KB
testcase_10	AC	169 ms 5,248 KB
testcase_11	AC	179 ms 5,248 KB
testcase_12	AC	197 ms 5,248 KB
testcase_13	AC	191 ms 5,248 KB
testcase_14	AC	163 ms 5,248 KB
testcase_15	AC	169 ms 5,248 KB
testcase_16	AC	181 ms 5,248 KB
testcase_17	AC	163 ms 5,248 KB
testcase_18	AC	120 ms 5,248 KB
testcase_19	AC	304 ms 5,248 KB
testcase_20	AC	308 ms 5,248 KB
testcase_21	AC	309 ms 5,248 KB
testcase_22	AC	305 ms 5,248 KB
testcase_23	AC	314 ms 5,248 KB
testcase_24	AC	307 ms 5,248 KB
testcase_25	AC	305 ms 5,248 KB
testcase_26	AC	310 ms 5,248 KB
testcase_27	AC	275 ms 5,248 KB
testcase_28	AC	309 ms 5,248 KB
testcase_29	AC	325 ms 5,248 KB
testcase_30	AC	374 ms 5,248 KB
testcase_31	WA	-
testcase_32	AC	443 ms 5,248 KB
testcase_33	WA	-
testcase_34	AC	570 ms 12,380 KB
testcase_35	AC	298 ms 22,844 KB
testcase_36	AC	300 ms 22,740 KB
testcase_37	AC	365 ms 22,680 KB
testcase_38	AC	301 ms 22,844 KB
testcase_39	AC	296 ms 22,744 KB
testcase_40	AC	301 ms 22,824 KB
testcase_41	AC	297 ms 22,732 KB
testcase_42	AC	293 ms 22,860 KB
testcase_43	AC	296 ms 22,744 KB
testcase_44	AC	295 ms 22,712 KB
testcase_45	AC	2,048 ms 292,528 KB
testcase_46	AC	1,597 ms 220,296 KB
testcase_47	AC	1,845 ms 265,672 KB
testcase_48	AC	1,513 ms 239,172 KB
testcase_49	AC	1,724 ms 263,392 KB
testcase_50	AC	1,493 ms 253,144 KB
testcase_51	AC	1,712 ms 260,276 KB
testcase_52	AC	1,634 ms 263,636 KB
testcase_53	AC	1,685 ms 252,984 KB
testcase_54	AC	1,496 ms 208,376 KB
testcase_55	AC	1,916 ms 292,788 KB
testcase_56	AC	1,596 ms 262,032 KB
testcase_57	AC	1,730 ms 249,348 KB
testcase_58	AC	1,442 ms 225,404 KB
testcase_59	AC	1,871 ms 276,264 KB
testcase_60	AC	1,926 ms 292,660 KB
testcase_61	AC	1,869 ms 288,492 KB
testcase_62	AC	1,459 ms 233,280 KB
testcase_63	AC	1,825 ms 275,164 KB
testcase_64	AC	1,430 ms 219,936 KB
testcase_65	AC	653 ms 48,292 KB
testcase_66	AC	362 ms 28,604 KB
testcase_67	AC	685 ms 48,788 KB
testcase_68	AC	351 ms 27,428 KB
testcase_69	AC	740 ms 57,244 KB
testcase_70	AC	1,249 ms 111,048 KB
testcase_71	AC	309 ms 26,048 KB
testcase_72	AC	654 ms 47,072 KB
testcase_73	AC	302 ms 25,468 KB
testcase_74	AC	749 ms 49,216 KB
testcase_75	AC	365 ms 42,144 KB
testcase_76	AC	710 ms 47,324 KB
testcase_77	AC	278 ms 23,736 KB
testcase_78	AC	612 ms 46,932 KB
testcase_79	AC	301 ms 24,916 KB
testcase_80	AC	539 ms 42,228 KB
testcase_81	AC	58 ms 5,248 KB
testcase_82	AC	873 ms 68,408 KB
testcase_83	AC	895 ms 68,088 KB
testcase_84	AC	889 ms 67,944 KB
testcase_85	AC	886 ms 67,068 KB
testcase_86	AC	828 ms 64,256 KB
testcase_87	AC	924 ms 71,824 KB
testcase_88	AC	846 ms 65,404 KB
testcase_89	AC	909 ms 71,908 KB
testcase_90	AC	817 ms 62,320 KB
testcase_91	AC	814 ms 63,664 KB
testcase_92	AC	859 ms 67,784 KB
testcase_93	AC	868 ms 67,796 KB
testcase_94	AC	874 ms 67,364 KB
testcase_95	WA	-
testcase_96	WA	-
testcase_97	WA	-
testcase_98	AC	260 ms 21,436 KB
testcase_99	WA	-
testcase_100	WA	-
testcase_101	WA	-
testcase_102	WA	-
testcase_103	WA	-
testcase_104	WA	-
testcase_105	WA	-
testcase_106	WA	-
testcase_107	WA	-
testcase_108	WA	-
testcase_109	WA	-
testcase_110	WA	-
testcase_111	WA	-
testcase_112	AC	794 ms 43,748 KB
testcase_113	AC	794 ms 43,592 KB
testcase_114	AC	769 ms 43,460 KB
testcase_115	AC	779 ms 43,636 KB
testcase_116	AC	769 ms 44,680 KB
testcase_117	AC	768 ms 44,068 KB
testcase_118	AC	778 ms 44,112 KB
testcase_119	AC	766 ms 44,804 KB
testcase_120	AC	763 ms 44,516 KB
testcase_121	AC	765 ms 44,448 KB
testcase_122	AC	770 ms 44,060 KB
testcase_123	AC	771 ms 44,316 KB
testcase_124	AC	755 ms 44,420 KB
testcase_125	WA	-
testcase_126	WA	-
testcase_127	AC	779 ms 43,804 KB
testcase_128	WA	-
testcase_129	WA	-
testcase_130	AC	801 ms 44,360 KB
testcase_131	WA	-
testcase_132	AC	1,097 ms 87,012 KB
testcase_133	AC	1,035 ms 85,192 KB
testcase_134	AC	1,021 ms 83,588 KB
testcase_135	AC	1,208 ms 81,236 KB
testcase_136	AC	961 ms 77,380 KB
testcase_137	AC	947 ms 76,856 KB
testcase_138	AC	940 ms 75,996 KB
testcase_139	AC	934 ms 75,328 KB
testcase_140	AC	931 ms 74,756 KB
testcase_141	AC	922 ms 73,740 KB

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ソースコード

raw source code

/**
 * date   : 2024-12-13 23:27:13
 * author : Nyaan
 */

#define NDEBUG

using namespace std;

// intrinstic
#include <immintrin.h>

#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cctype>
#include <cfenv>
#include <cfloat>
#include <chrono>
#include <cinttypes>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdarg>
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <deque>
#include <fstream>
#include <functional>
#include <initializer_list>
#include <iomanip>
#include <ios>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <streambuf>
#include <string>
#include <tr2/dynamic_bitset>
#include <tuple>
#include <type_traits>
#include <typeinfo>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

// utility

namespace Nyaan {
using ll = long long;
using i64 = long long;
using u64 = unsigned long long;
using i128 = __int128_t;
using u128 = __uint128_t;

template <typename T>
using V = vector<T>;
template <typename T>
using VV = vector<vector<T>>;
using vi = vector<int>;
using vl = vector<long long>;
using vd = V<double>;
using vs = V<string>;
using vvi = vector<vector<int>>;
using vvl = vector<vector<long long>>;
template <typename T>
using minpq = priority_queue<T, vector<T>, greater<T>>;

template <typename T, typename U>
struct P : pair<T, U> {
  template <typename... Args>
  constexpr P(Args... args) : pair<T, U>(args...) {}

  using pair<T, U>::first;
  using pair<T, U>::second;

  P &operator+=(const P &r) {
    first += r.first;
    second += r.second;
    return *this;
  }
  P &operator-=(const P &r) {
    first -= r.first;
    second -= r.second;
    return *this;
  }
  P &operator*=(const P &r) {
    first *= r.first;
    second *= r.second;
    return *this;
  }
  template <typename S>
  P &operator*=(const S &r) {
    first *= r, second *= r;
    return *this;
  }
  P operator+(const P &r) const { return P(*this) += r; }
  P operator-(const P &r) const { return P(*this) -= r; }
  P operator*(const P &r) const { return P(*this) *= r; }
  template <typename S>
  P operator*(const S &r) const {
    return P(*this) *= r;
  }
  P operator-() const { return P{-first, -second}; }
};

using pl = P<ll, ll>;
using pi = P<int, int>;
using vp = V<pl>;

constexpr int inf = 1001001001;
constexpr long long infLL = 4004004004004004004LL;

template <typename T>
int sz(const T &t) {
  return t.size();
}

template <typename T, typename U>
inline bool amin(T &x, U y) {
  return (y < x) ? (x = y, true) : false;
}
template <typename T, typename U>
inline bool amax(T &x, U y) {
  return (x < y) ? (x = y, true) : false;
}

template <typename T>
inline T Max(const vector<T> &v) {
  return *max_element(begin(v), end(v));
}
template <typename T>
inline T Min(const vector<T> &v) {
  return *min_element(begin(v), end(v));
}
template <typename T>
inline long long Sum(const vector<T> &v) {
  return accumulate(begin(v), end(v), 0LL);
}

template <typename T>
int lb(const vector<T> &v, const T &a) {
  return lower_bound(begin(v), end(v), a) - begin(v);
}
template <typename T>
int ub(const vector<T> &v, const T &a) {
  return upper_bound(begin(v), end(v), a) - begin(v);
}

constexpr long long TEN(int n) {
  long long ret = 1, x = 10;
  for (; n; x *= x, n >>= 1) ret *= (n & 1 ? x : 1);
  return ret;
}

template <typename T, typename U>
pair<T, U> mkp(const T &t, const U &u) {
  return make_pair(t, u);
}

template <typename T>
vector<T> mkrui(const vector<T> &v, bool rev = false) {
  vector<T> ret(v.size() + 1);
  if (rev) {
    for (int i = int(v.size()) - 1; i >= 0; i--) ret[i] = v[i] + ret[i + 1];
  } else {
    for (int i = 0; i < int(v.size()); i++) ret[i + 1] = ret[i] + v[i];
  }
  return ret;
};

template <typename T>
vector<T> mkuni(const vector<T> &v) {
  vector<T> ret(v);
  sort(ret.begin(), ret.end());
  ret.erase(unique(ret.begin(), ret.end()), ret.end());
  return ret;
}

template <typename F>
vector<int> mkord(int N, F f) {
  vector<int> ord(N);
  iota(begin(ord), end(ord), 0);
  sort(begin(ord), end(ord), f);
  return ord;
}

template <typename T>
vector<int> mkinv(vector<T> &v) {
  int max_val = *max_element(begin(v), end(v));
  vector<int> inv(max_val + 1, -1);
  for (int i = 0; i < (int)v.size(); i++) inv[v[i]] = i;
  return inv;
}

vector<int> mkiota(int n) {
  vector<int> ret(n);
  iota(begin(ret), end(ret), 0);
  return ret;
}

template <typename T>
T mkrev(const T &v) {
  T w{v};
  reverse(begin(w), end(w));
  return w;
}

template <typename T>
bool nxp(T &v) {
  return next_permutation(begin(v), end(v));
}

// 返り値の型は入力の T に依存
// i 要素目 : [0, a[i])
template <typename T>
vector<vector<T>> product(const vector<T> &a) {
  vector<vector<T>> ret;
  vector<T> v;
  auto dfs = [&](auto rc, int i) -> void {
    if (i == (int)a.size()) {
      ret.push_back(v);
      return;
    }
    for (int j = 0; j < a[i]; j++) v.push_back(j), rc(rc, i + 1), v.pop_back();
  };
  dfs(dfs, 0);
  return ret;
}

// F : function(void(T&)), mod を取る操作
// T : 整数型のときはオーバーフローに注意する
template <typename T>
T Power(T a, long long n, const T &I, const function<void(T &)> &f) {
  T res = I;
  for (; n; f(a = a * a), n >>= 1) {
    if (n & 1) f(res = res * a);
  }
  return res;
}
// T : 整数型のときはオーバーフローに注意する
template <typename T>
T Power(T a, long long n, const T &I = T{1}) {
  return Power(a, n, I, function<void(T &)>{[](T &) -> void {}});
}

template <typename T>
T Rev(const T &v) {
  T res = v;
  reverse(begin(res), end(res));
  return res;
}

template <typename T>
vector<T> Transpose(const vector<T> &v) {
  using U = typename T::value_type;
  if(v.empty()) return {};
  int H = v.size(), W = v[0].size();
  vector res(W, T(H, U{}));
  for (int i = 0; i < H; i++) {
    for (int j = 0; j < W; j++) {
      res[j][i] = v[i][j];
    }
  }
  return res;
}

template <typename T>
vector<T> Rotate(const vector<T> &v, int clockwise = true) {
  using U = typename T::value_type;
  int H = v.size(), W = v[0].size();
  vector res(W, T(H, U{}));
  for (int i = 0; i < H; i++) {
    for (int j = 0; j < W; j++) {
      if (clockwise) {
        res[W - 1 - j][i] = v[i][j];
      } else {
        res[j][H - 1 - i] = v[i][j];
      }
    }
  }
  return res;
}

}  // namespace Nyaan


// bit operation

namespace Nyaan {
__attribute__((target("popcnt"))) inline int popcnt(const u64 &a) {
  return __builtin_popcountll(a);
}
inline int lsb(const u64 &a) { return a ? __builtin_ctzll(a) : 64; }
inline int ctz(const u64 &a) { return a ? __builtin_ctzll(a) : 64; }
inline int msb(const u64 &a) { return a ? 63 - __builtin_clzll(a) : -1; }
template <typename T>
inline int gbit(const T &a, int i) {
  return (a >> i) & 1;
}
template <typename T>
inline void sbit(T &a, int i, bool b) {
  if (gbit(a, i) != b) a ^= T(1) << i;
}
constexpr long long PW(int n) { return 1LL << n; }
constexpr long long MSK(int n) { return (1LL << n) - 1; }
}  // namespace Nyaan


// inout

namespace Nyaan {

template <typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
  os << p.first << " " << p.second;
  return os;
}
template <typename T, typename U>
istream &operator>>(istream &is, pair<T, U> &p) {
  is >> p.first >> p.second;
  return is;
}

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

istream &operator>>(istream &is, __int128_t &x) {
  string S;
  is >> S;
  x = 0;
  int flag = 0;
  for (auto &c : S) {
    if (c == '-') {
      flag = true;
      continue;
    }
    x *= 10;
    x += c - '0';
  }
  if (flag) x = -x;
  return is;
}

istream &operator>>(istream &is, __uint128_t &x) {
  string S;
  is >> S;
  x = 0;
  for (auto &c : S) {
    x *= 10;
    x += c - '0';
  }
  return is;
}

ostream &operator<<(ostream &os, __int128_t x) {
  if (x == 0) return os << 0;
  if (x < 0) os << '-', x = -x;
  string S;
  while (x) S.push_back('0' + x % 10), x /= 10;
  reverse(begin(S), end(S));
  return os << S;
}
ostream &operator<<(ostream &os, __uint128_t x) {
  if (x == 0) return os << 0;
  string S;
  while (x) S.push_back('0' + x % 10), x /= 10;
  reverse(begin(S), end(S));
  return os << S;
}

void in() {}
template <typename T, class... U>
void in(T &t, U &...u) {
  cin >> t;
  in(u...);
}

void out() { cout << "\n"; }
template <typename T, class... U, char sep = ' '>
void out(const T &t, const U &...u) {
  cout << t;
  if (sizeof...(u)) cout << sep;
  out(u...);
}

struct IoSetupNya {
  IoSetupNya() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(15);
    cerr << fixed << setprecision(7);
  }
} iosetupnya;

}  // namespace Nyaan


// debug


#ifdef NyaanDebug
#define trc(...) (void(0))
#endif
#ifndef NyaanDebug
#define trc(...) (void(0))
#endif

#ifndef NyaanLocal
#define trc2(...) (void(0))
#endif


// macro

#define each(x, v) for (auto&& x : v)
#define each2(x, y, v) for (auto&& [x, y] : v)
#define all(v) (v).begin(), (v).end()
#define rep(i, N) for (long long i = 0; i < (long long)(N); i++)
#define repr(i, N) for (long long i = (long long)(N)-1; i >= 0; i--)
#define rep1(i, N) for (long long i = 1; i <= (long long)(N); i++)
#define repr1(i, N) for (long long i = (N); (long long)(i) > 0; i--)
#define reg(i, a, b) for (long long i = (a); i < (b); i++)
#define regr(i, a, b) for (long long i = (b)-1; i >= (a); i--)
#define fi first
#define se second
#define ini(...)   \
  int __VA_ARGS__; \
  in(__VA_ARGS__)
#define inl(...)         \
  long long __VA_ARGS__; \
  in(__VA_ARGS__)
#define ins(...)      \
  string __VA_ARGS__; \
  in(__VA_ARGS__)
#define in2(s, t)                           \
  for (int i = 0; i < (int)s.size(); i++) { \
    in(s[i], t[i]);                         \
  }
#define in3(s, t, u)                        \
  for (int i = 0; i < (int)s.size(); i++) { \
    in(s[i], t[i], u[i]);                   \
  }
#define in4(s, t, u, v)                     \
  for (int i = 0; i < (int)s.size(); i++) { \
    in(s[i], t[i], u[i], v[i]);             \
  }
#define die(...)             \
  do {                       \
    Nyaan::out(__VA_ARGS__); \
    return;                  \
  } while (0)


namespace Nyaan {
void solve();
}
int main() { Nyaan::solve(); }


//



using namespace std;



template <typename Container>
vector<int> z_algorithm(const Container& s) {
  int n = s.size();
  if(n == 0) return {};
  vector<int> a(n);
  a[0] = n;
  int i = 1, j = 0;
  while (i < n) {
    while (i + j < n && s[j] == s[i + j]) j++;
    a[i] = j;
    if (j == 0) {
      i++;
      continue;
    }
    int k = 1;
    while (i + k < n && k + a[k] < j) a[i + k] = a[k], k++;
    i += k, j -= k;
  }
  return a;
}

/**
 * @brief Z algorithm
 */


// (p, l, r) : S[l, r) は周期 p かつ極大
// sum_{(p,l,r)} 1 <= n
// sum_{(p,l,r)} (r-l)/p <= 3n
// sum_{(p,l,r)} (r-l+1-2*p) = O(n log n)
template <typename C>
vector<tuple<int, int, int>> run_enumerate(const C& S) {
  int N = S.size();
  using T = tuple<int, int, int>;
  vector<vector<pair<int, int>>> by_p(N + 1);

  auto solve_sub = [&](const C& l, const C& r) {
    vector<T> res;
    int n = l.size(), m = r.size();
    C s = l, t = r;
    t.insert(end(t), begin(l), end(l));
    t.insert(end(t), begin(r), end(r));
    reverse(begin(s), end(s));
    auto ZS = z_algorithm(s), ZT = z_algorithm(t);
    for (int p = 1; p <= n; p++) {
      int a = p == n ? p : min(ZS[p] + p, n);
      int b = min(ZT[n + m - p], m);
      if (a + b < 2 * p) continue;
      res.emplace_back(p, a, b);
    }
    return res;
  };

  auto dfs = [&](auto rc, int L, int R) -> void {
    if (R - L <= 1) return;
    int M = (L + R) / 2;
    rc(rc, L, M), rc(rc, M, R);
    C SL{begin(S) + L, begin(S) + M};
    C SR{begin(S) + M, begin(S) + R};
    auto sub_res1 = solve_sub(SL, SR);
    for (auto& [p, a, b] : sub_res1) by_p[p].emplace_back(M - a, M + b);
    reverse(begin(SL), end(SL));
    reverse(begin(SR), end(SR));
    auto sub_res2 = solve_sub(SR, SL);
    for (auto& [p, a, b] : sub_res2) by_p[p].emplace_back(M - b, M + a);
  };
  dfs(dfs, 0, N);

  vector<T> res;
  set<pair<int, int>> done;
  for (int p = 0; p <= N; p++) {
    auto& LR = by_p[p];
    sort(begin(LR), end(LR), [](auto& x, auto& y) {
      if (x.first == y.first) return x.second > y.second;
      return x.first < y.first;
    });
    int r = -1;
    for (auto& lr : LR) {
      if (r >= lr.second) continue;
      r = lr.second;
      if (!done.count(lr)) {
        done.insert(lr);
        res.emplace_back(p, lr.first, lr.second);
      }
    }
  }
  return res;
}




using namespace Nyaan;

int min_period(string S) {
  int N = sz(S);
  vi z = z_algorithm(S);
  rep1(i, N - 1) {
    if (N % i != 0) continue;
    if (z[i] == N - i) return i;
  }
  return N;
}
int num_len(int x) { return to_string(x).size(); }

string naive(string S) {
  int N = sz(S);
  vector<int> dp(N + 1, inf);
  vector<int> prev(N + 1, -1);
  dp[0] = 0;
  rep(i, N) reg(j, i + 1, N + 1) {
    int p = min_period(S.substr(i, j - i));
    int val = dp[i] + p + num_len((j - i) / p);
    if (amin(dp[j], val)) prev[j] = i;
  }
  string ans;
  for (int j = N; j != 0;) {
    int i = prev[j];
    int p = min_period(S.substr(i, j - i));
    string cur = S.substr(i, p) + to_string((j - i) / p);
    reverse(all(cur));
    ans += cur;
    j = i;
  }
  reverse(all(ans));
  assert(sz(ans) == dp[N]);
  return ans;
}

string uso(string S) {
  int N = sz(S);
  auto run = run_enumerate(S);

  VV<pi> rundata(N + 1);
  auto ketasuu = [&](int i) {
    if (i < 10) return 1;
    if (i < 100) return 2;
    if (i < 1000) return 3;
    if (i < 10000) return 4;
    if (i < 100000) return 5;
    if (i < 1000000) return 6;
    if (i < 10000000) return 7;
    return 8;
  };
  auto add = [&](int l, int r, int p) -> void {
    if (l >= r) return;
    assert((r - l) % p == 0);
    int x = p + ketasuu((r - l) / p);
    rundata[l].emplace_back(r, x);
  };

  for (auto &[p, l, r] : run) {
    rep(i, p) {
      if (l + i + 2 * p <= r) {
        // [l+i, s) が p の倍数であるような最大の s<=r
        int s = l + i + (r - (l + i)) / p * p;
        rep(x, 5) rep(y, 5) add(l + i + x * p, s - y * p, p);
      } else {
        break;
      }
    }
  }
  vector<int> dp(N + 1, inf);
  vector<int> prev(N + 1, -1);
  dp[0] = 0;
  // dp[i] - i を保持する
  int prev_best = inf, prev_pos = -1;

  rep(i, N + 1) {
    // dp[j] (j<i) からの遷移
    if (amin(dp[i], prev_best + i + 1)) prev[i] = prev_pos;

    // dp[i] の値, 決定
    if (amin(prev_best, dp[i] - i)) prev_pos = i;
    each2(r, x, rundata[i]) {
      if (amin(dp[r], dp[i] + x)) prev[r] = i;
    }
  }

  string ans;
  for (int j = N; j != 0;) {
    int i = prev[j];
    int p = min_period(S.substr(i, j - i));
    string cur = S.substr(i, p) + to_string((j - i) / p);
    reverse(all(cur));
    ans += cur;
    j = i;
  }
  reverse(all(ans));
  assert(sz(ans) == dp[N]);
  return ans;
}

string restore(string T, int limit) {
  string res;
  for (int i = 0; i < (int)T.size();) {
    int j = i;
    while (j < (int)T.size() and 'a' <= T[j] and T[j] <= 'z') j++;
    int k = j;
    while (k < (int)T.size() and '0' <= T[k] and T[k] <= '9') k++;
    if (i == j or j == k) return {};
    if (k - j > 15) return {};
    string sub = T.substr(i, j - i);
    int num = stoll(T.substr(j, k - j));
    while (num--) {
      res += sub;
      if ((int)res.size() > limit) return res;
    }
    i = k;
  }
  return res;
}

void check(string S) {
  auto an = naive(S);
  auto ac = uso(S);
  assert(restore(an, sz(S)) == S);
  assert(restore(ac, sz(S)) == S);
  if (sz(an) != sz(ac)) {
    trc(S, an, ac);
    exit(1);
  }
}

void q() {
  /*
  check("aaaaaaaaaa");
  check("baaaaaaaaa");
  check("aabababc");
  check("aaaaaaaaaa");
  rep1(len, 11) {
    rep(b, Power(3, len)) {
      string S;
      for (int x = b; sz(S) < len; x /= 3) S.push_back(x % 3 + 'a');
      check(S);
    }
  }
  rep1(len, 18) {
    rep(b, PW(len)) {
      string S;
      rep(i, len) S.push_back('a' + gbit(b, i));
      check(S);
    }
  }
  trc2("OK");
  */

  ins(S);
  auto ans = uso(S);
  assert(restore(ans, sz(S)) == S);
  out(ans);
}

void Nyaan::solve() {
  int t = 1;
  in(t);
  while (t--) q();
}

yukicoder

結果

テストケース

ソースコード