結果
問題 | No.3000 Optimal Run Length Encoding |
ユーザー | NyaanNyaan |
提出日時 | 2024-12-14 01:13:09 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 16,783 bytes |
コンパイル時間 | 4,132 ms |
コンパイル使用メモリ | 281,824 KB |
実行使用メモリ | 353,228 KB |
最終ジャッジ日時 | 2024-12-24 23:45:40 |
合計ジャッジ時間 | 143,771 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 3 ms
5,248 KB |
testcase_01 | AC | 237 ms
5,248 KB |
testcase_02 | AC | 229 ms
5,248 KB |
testcase_03 | AC | 222 ms
5,248 KB |
testcase_04 | AC | 224 ms
5,248 KB |
testcase_05 | AC | 206 ms
5,248 KB |
testcase_06 | AC | 208 ms
5,248 KB |
testcase_07 | AC | 219 ms
5,248 KB |
testcase_08 | AC | 216 ms
5,248 KB |
testcase_09 | AC | 205 ms
5,248 KB |
testcase_10 | AC | 194 ms
5,248 KB |
testcase_11 | AC | 202 ms
5,248 KB |
testcase_12 | AC | 212 ms
5,248 KB |
testcase_13 | AC | 212 ms
5,248 KB |
testcase_14 | AC | 196 ms
5,248 KB |
testcase_15 | AC | 193 ms
5,248 KB |
testcase_16 | AC | 218 ms
5,248 KB |
testcase_17 | AC | 185 ms
5,248 KB |
testcase_18 | AC | 134 ms
5,248 KB |
testcase_19 | AC | 355 ms
5,248 KB |
testcase_20 | AC | 362 ms
5,248 KB |
testcase_21 | AC | 358 ms
5,248 KB |
testcase_22 | AC | 359 ms
5,248 KB |
testcase_23 | AC | 366 ms
5,248 KB |
testcase_24 | AC | 354 ms
5,248 KB |
testcase_25 | AC | 358 ms
5,248 KB |
testcase_26 | AC | 359 ms
5,248 KB |
testcase_27 | AC | 322 ms
5,248 KB |
testcase_28 | AC | 360 ms
5,248 KB |
testcase_29 | AC | 382 ms
5,248 KB |
testcase_30 | AC | 442 ms
5,248 KB |
testcase_31 | AC | 466 ms
5,248 KB |
testcase_32 | AC | 523 ms
5,248 KB |
testcase_33 | AC | 568 ms
5,248 KB |
testcase_34 | AC | 680 ms
12,512 KB |
testcase_35 | AC | 374 ms
22,720 KB |
testcase_36 | AC | 378 ms
22,736 KB |
testcase_37 | AC | 373 ms
22,852 KB |
testcase_38 | AC | 372 ms
22,612 KB |
testcase_39 | AC | 373 ms
22,740 KB |
testcase_40 | AC | 365 ms
22,604 KB |
testcase_41 | AC | 372 ms
22,728 KB |
testcase_42 | AC | 372 ms
22,608 KB |
testcase_43 | AC | 369 ms
22,868 KB |
testcase_44 | AC | 366 ms
22,608 KB |
testcase_45 | AC | 2,122 ms
292,404 KB |
testcase_46 | AC | 1,509 ms
220,200 KB |
testcase_47 | AC | 1,970 ms
265,668 KB |
testcase_48 | AC | 1,680 ms
239,176 KB |
testcase_49 | AC | 1,993 ms
263,068 KB |
testcase_50 | AC | 1,656 ms
253,008 KB |
testcase_51 | AC | 1,925 ms
260,152 KB |
testcase_52 | AC | 1,721 ms
263,768 KB |
testcase_53 | AC | 1,898 ms
252,988 KB |
testcase_54 | AC | 1,526 ms
208,372 KB |
testcase_55 | AC | 2,065 ms
292,548 KB |
testcase_56 | AC | 1,765 ms
261,904 KB |
testcase_57 | AC | 1,951 ms
249,296 KB |
testcase_58 | AC | 1,597 ms
225,428 KB |
testcase_59 | AC | 2,058 ms
276,132 KB |
testcase_60 | AC | 2,129 ms
292,656 KB |
testcase_61 | AC | 2,069 ms
288,232 KB |
testcase_62 | AC | 1,596 ms
233,496 KB |
testcase_63 | AC | 2,039 ms
279,032 KB |
testcase_64 | AC | 1,537 ms
219,988 KB |
testcase_65 | AC | 764 ms
48,296 KB |
testcase_66 | AC | 423 ms
28,680 KB |
testcase_67 | AC | 820 ms
50,196 KB |
testcase_68 | AC | 406 ms
27,544 KB |
testcase_69 | AC | 868 ms
56,984 KB |
testcase_70 | AC | 1,448 ms
110,792 KB |
testcase_71 | AC | 374 ms
26,044 KB |
testcase_72 | AC | 856 ms
68,248 KB |
testcase_73 | AC | 376 ms
29,324 KB |
testcase_74 | AC | 1,397 ms
198,200 KB |
testcase_75 | AC | 520 ms
54,716 KB |
testcase_76 | AC | 1,429 ms
287,712 KB |
testcase_77 | AC | 339 ms
30,008 KB |
testcase_78 | AC | 730 ms
53,208 KB |
testcase_79 | AC | 350 ms
30,428 KB |
testcase_80 | AC | 638 ms
43,128 KB |
testcase_81 | AC | 132 ms
5,248 KB |
testcase_82 | AC | 1,529 ms
248,436 KB |
testcase_83 | AC | 1,505 ms
238,496 KB |
testcase_84 | AC | 1,490 ms
237,816 KB |
testcase_85 | AC | 1,407 ms
208,508 KB |
testcase_86 | AC | 1,307 ms
174,616 KB |
testcase_87 | AC | 1,843 ms
353,228 KB |
testcase_88 | AC | 1,334 ms
187,224 KB |
testcase_89 | AC | 1,832 ms
353,228 KB |
testcase_90 | AC | 1,240 ms
165,980 KB |
testcase_91 | AC | 1,286 ms
171,604 KB |
testcase_92 | AC | 1,488 ms
236,148 KB |
testcase_93 | AC | 1,498 ms
235,928 KB |
testcase_94 | AC | 1,504 ms
235,920 KB |
testcase_95 | WA | - |
testcase_96 | WA | - |
testcase_97 | WA | - |
testcase_98 | AC | 294 ms
21,308 KB |
testcase_99 | WA | - |
testcase_100 | WA | - |
testcase_101 | WA | - |
testcase_102 | WA | - |
testcase_103 | WA | - |
testcase_104 | WA | - |
testcase_105 | AC | 618 ms
106,124 KB |
testcase_106 | WA | - |
testcase_107 | AC | 489 ms
51,052 KB |
testcase_108 | WA | - |
testcase_109 | AC | 611 ms
105,412 KB |
testcase_110 | AC | 599 ms
81,648 KB |
testcase_111 | WA | - |
testcase_112 | AC | 922 ms
44,264 KB |
testcase_113 | AC | 918 ms
44,364 KB |
testcase_114 | AC | 926 ms
44,476 KB |
testcase_115 | AC | 931 ms
44,340 KB |
testcase_116 | AC | 908 ms
45,580 KB |
testcase_117 | AC | 914 ms
44,856 KB |
testcase_118 | AC | 912 ms
44,260 KB |
testcase_119 | AC | 913 ms
45,704 KB |
testcase_120 | AC | 921 ms
45,044 KB |
testcase_121 | AC | 911 ms
45,348 KB |
testcase_122 | AC | 921 ms
45,080 KB |
testcase_123 | AC | 912 ms
45,200 KB |
testcase_124 | AC | 916 ms
45,312 KB |
testcase_125 | WA | - |
testcase_126 | WA | - |
testcase_127 | AC | 902 ms
44,776 KB |
testcase_128 | WA | - |
testcase_129 | WA | - |
testcase_130 | AC | 924 ms
44,356 KB |
testcase_131 | WA | - |
testcase_132 | AC | 1,341 ms
87,048 KB |
testcase_133 | AC | 1,299 ms
85,312 KB |
testcase_134 | AC | 1,347 ms
83,640 KB |
testcase_135 | AC | 1,438 ms
96,376 KB |
testcase_136 | AC | 1,597 ms
171,732 KB |
testcase_137 | AC | 1,601 ms
183,796 KB |
testcase_138 | AC | 1,625 ms
195,888 KB |
testcase_139 | AC | 1,681 ms
230,612 KB |
testcase_140 | AC | 1,778 ms
275,564 KB |
testcase_141 | AC | 1,848 ms
320,668 KB |
ソースコード
/** * date : 2024-12-14 01:13:00 * 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; int len = min<int>(100, (r - (l + i)) / p + 2); rep(x, len) rep(y, len) 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(); }