結果

問題 No.1339 循環小数
ユーザー apricity
提出日時 2023-01-25 02:02:23
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 640 ms / 2,000 ms
コード長 3,664 bytes
コンパイル時間 1,448 ms
コンパイル使用メモリ 130,928 KB
最終ジャッジ日時 2025-02-10 06:39:13
ジャッジサーバーID
(参考情報)
judge2 / judge4
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 1
other AC * 36
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 #
プレゼンテーションモードにする

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<numeric>
#include<cmath>
#include<utility>
#include<tuple>
#include<cstdint>
#include<cstdio>
#include<iomanip>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<deque>
#include<unordered_map>
#include<unordered_set>
#include<bitset>
#include<chrono>
#include<random>
#include<cctype>
#include<cassert>
#include<cstddef>
#include<iterator>
#include<string_view>
#include<type_traits>
#ifdef LOCAL
# include "debug_print.hpp"
# define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
# define debug(...) (static_cast<void>(0))
#endif
using namespace std;
#define rep(i,n) for(decltype(n) i=0; i<(n); i++)
#define rrep(i,n) for(decltype(n) i=(n)-1; i>=0; i--)
#define FOR(i,a,b) for(decltype(a) i=(a); i<(b); i++)
#define RFOR(i,a,b) for(decltype(b) i=(b-1); i>=(a); i--)
#define ALL(v) v.begin(), v.end()
#define RALL(v) v.rbegin(), v.rend()
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
#define pb push_back
using ll = long long;
using D = double;
using LD = long double;
using P = pair<int, int>;
template<typename T> using PQ = priority_queue<T,vector<T>>;
template<typename T> using minPQ = priority_queue<T, vector<T>, greater<T>>;
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; }
void yesno(bool flag) {cout << (flag?"Yes":"No") << "\n";}
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;
}
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...);
}
void outr() {}
template<typename T, class... U, char sep = ' '>
void outr(const T &t, const U &...u) {
cout << t;
outr(u...);
}
int64_t mod_log(int64_t a, int64_t b, int64_t p) {
int64_t g = 1;
for(int64_t i = p; i; i /= 2) (g *= a) %= p;
g = gcd(g, p);
int64_t t = 1, c = 0;
for(; t % g; c++) {
if(t == b) return c;
(t *= a) %= p;
}
if(b % g) return -1;
t /= g;
b /= g;
int64_t n = p / g, h = 0, gs = 1;
for(; h * h < n; h++) (gs *= a) %= n;
unordered_map< int64_t, int64_t > bs;
for(int64_t s = 0, e = b; s < h; bs[e] = ++s) {
(e *= a) %= n;
}
for(int64_t s = 0, e = t; s < n;) {
(e *= gs) %= n;
s += h;
if(bs.count(e)) return c + s - bs[e];
}
return -1;
}
long long modinv(long long a, long long m) {
long long b = m, u = 1, v = 0;
while (b) {
long long t = a / b;
a -= t * b; swap(a, b);
u -= t * v; swap(u, v);
}
u %= m;
if (u < 0) u += m;
return u;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int t; in(t);
while(t--){
int64_t n; in(n);
while(n%2 == 0) n /= 2;
while(n%5 == 0) n /= 5;
out(mod_log(10,modinv(10,n),n)+1);
}
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0