結果
問題 | No.2454 Former < Latter |
ユーザー | kaikey |
提出日時 | 2023-09-01 21:57:37 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,336 bytes |
コンパイル時間 | 2,539 ms |
コンパイル使用メモリ | 208,552 KB |
実行使用メモリ | 8,416 KB |
最終ジャッジ日時 | 2024-06-11 03:44:33 |
合計ジャッジ時間 | 5,479 ms |
ジャッジサーバーID (参考情報) |
judge2 / 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
5,248 KB |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | AC | 63 ms
8,292 KB |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | AC | 64 ms
8,284 KB |
testcase_12 | AC | 65 ms
8,416 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 1,307 ms
5,376 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
ソースコード
#include "bits/stdc++.h" #include <random> #include <chrono> #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define SZ(x) ((lint)(x).size()) #define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i) #define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) #define endk '\n' using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld; struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(30); }; } fast_ios_; template<class T> auto add = [](T a, T b) -> T { return a + b; }; template<class T> auto mul = [](T a, T b) -> T { return a * b; }; template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); }; template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); }; template<class T> using V = vector<T>; using Vl = V<lint>; using VVl = V<Vl>; using VVVl = V<V<Vl>>; 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<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 (b < a) { a = b; return 1; } return 0; } template <class T> T div_floor(T a, T b) { if (b < 0) a *= -1, b *= -1; return a >= 0 ? a / b : (a + 1) / b - 1; } template <class T> T div_ceil(T a, T b) { if (b < 0) a *= -1, b *= -1; return a > 0 ? (a - 1) / b + 1 : a / b; } template <class F> struct rec { F f; rec(F&& f_) : f(std::forward<F>(f_)) {} template <class... Args> auto operator()(Args &&... args) const { return f(*this, std::forward<Args>(args)...); } }; lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); } lint digit(lint a) { return (lint)log10(a); } lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); } lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); } bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); } const lint MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e18; lint dx[8] = { 0, 1, 0, -1, 1, -1, 1, -1 }, dy[8] = { 1, 0, -1, 0, -1, -1, 1, 1 }; bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; } struct Edge { lint from, to; lint cost; Edge() { } Edge(lint u, lint v, lint c) { cost = c; from = u; to = v; } bool operator<(const Edge& e) const { return cost < e.cost; } }; struct WeightedEdge { lint to; lint cost; WeightedEdge(lint v, lint c) { to = v; cost = c; } bool operator<(const WeightedEdge& e) const { return cost < e.cost; } }; using WeightedGraph = V<V<WeightedEdge>>; typedef pair<plint, lint> tlint; typedef pair<ld, ld> pld; typedef pair<plint, plint> qlint; typedef pair<Edge, lint> pEd; typedef pair<lint, Vl> vVl; typedef pair<set<lint>, set<lint>> pset; struct RollingHash { const _ulong MASK30 = (1ULL << 30) - 1; const _ulong MASK31 = (1ULL << 31) - 1; const _ulong MOD = (1ULL << 61) - 1; const _ulong MASK61 = MOD; vector<_ulong> hashed, power; RollingHash(const string& s, _ulong base) { int sz = SZ(s); hashed.assign(sz + 1, 0); power.assign(sz + 1, 0); power[0] = 1; for (int i = 0; i < sz; i++) { power[i + 1] = mul(power[i], base); hashed[i + 1] = mul(hashed[i], base) + s[i]; if (hashed[i + 1] >= MOD) hashed[i + 1] -= MOD; } } //乱数生成、main関数にコピペする void generate_base() { _ulong base; { //乱数生成 random_device seed_gen; mt19937 engine(seed_gen()); uniform_real_distribution<> dist1(129, INT_MAX); base = dist1(engine); } } _ulong get(int l, int r) const { _ulong ret = hashed[r] + MOD - mul(hashed[l], power[r - l]); if (ret >= MOD) ret -= MOD; return ret; } //a*b mod 2^61-1を返す関数 inline _ulong mul(_ulong a, _ulong b) const { _ulong u_a = a >> 31;//aの31bit以降 _ulong d_a = a & MASK31;//aの31bit未満 _ulong u_b = b >> 31; _ulong d_b = b & MASK31; _ulong mid = d_a * u_b + u_a * d_b; _ulong u_mid = mid >> 30; _ulong d_mid = mid & MASK30; return CalcMod(u_a * u_b * 2 + u_mid + (d_mid << 31) + d_a * d_b); } //mod 2^61-1を返す関数 inline _ulong CalcMod(_ulong x) const { _ulong u_x = x >> 61; _ulong d_x = x & MASK61; _ulong res = u_x + d_x; if (res >= MOD) res -= MOD; return res; } }; int main() { lint T; cin >> T; while (T--) { lint N; cin >> N; string s; cin >> s; _ulong base; { //乱数生成 random_device seed_gen; mt19937 engine(seed_gen()); uniform_real_distribution<> dist1(129, INT_MAX); base = dist1(engine); } RollingHash rh(s, base); lint ans = 0; REP(i, N - 1) { lint ng = 0, ok = min(i + 1, N - (i + 1)); while (ok - ng > 1) { lint mid = (ok + ng) / 2; if (rh.get(0, ok) != rh.get(i + 1, i + 1 + ok)) ok = mid; else ng = mid; } if (s[ng] == s[i + 1 + ng]) { if (i + 1 < N - (i + 1)) ans++; } else { if (s[ng] < s[i + 1 + ng]) ans++; } } cout << ans << endk; } }