結果
問題 | No.551 夏休みの思い出(2) |
ユーザー | koyumeishi |
提出日時 | 2017-07-29 02:04:41 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,940 bytes |
コンパイル時間 | 1,423 ms |
コンパイル使用メモリ | 116,512 KB |
実行使用メモリ | 10,496 KB |
最終ジャッジ日時 | 2024-10-10 20:23:45 |
合計ジャッジ時間 | 37,561 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(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
10,496 KB |
testcase_01 | AC | 3 ms
5,248 KB |
testcase_02 | AC | 3 ms
5,248 KB |
testcase_03 | AC | 5 ms
5,248 KB |
testcase_04 | AC | 7 ms
5,248 KB |
testcase_05 | AC | 13 ms
5,248 KB |
testcase_06 | AC | 18 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | WA | - |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | WA | - |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 2 ms
5,248 KB |
testcase_17 | AC | 5 ms
5,248 KB |
testcase_18 | AC | 7 ms
5,248 KB |
testcase_19 | AC | 7 ms
5,248 KB |
testcase_20 | AC | 6 ms
5,248 KB |
testcase_21 | AC | 7 ms
5,248 KB |
testcase_22 | AC | 3 ms
5,248 KB |
testcase_23 | AC | 4 ms
5,248 KB |
testcase_24 | AC | 6 ms
5,248 KB |
testcase_25 | AC | 4 ms
5,248 KB |
testcase_26 | AC | 5 ms
5,248 KB |
testcase_27 | TLE | - |
testcase_28 | TLE | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | TLE | - |
testcase_34 | WA | - |
testcase_35 | AC | 1,884 ms
5,248 KB |
testcase_36 | WA | - |
testcase_37 | TLE | - |
testcase_38 | -- | - |
testcase_39 | -- | - |
testcase_40 | -- | - |
testcase_41 | -- | - |
testcase_42 | -- | - |
testcase_43 | -- | - |
testcase_44 | -- | - |
testcase_45 | -- | - |
testcase_46 | -- | - |
testcase_47 | -- | - |
testcase_48 | -- | - |
ソースコード
#include <iostream> #include <vector> #include <cstdio> #include <sstream> #include <map> #include <string> #include <algorithm> #include <queue> #include <cmath> #include <functional> #include <set> #include <ctime> #include <random> #include <chrono> #include <cassert> #include <tuple> #include <utility> using namespace std; namespace { using Integer = long long; //__int128; template<class T, class S> istream& operator >> (istream& is, pair<T,S>& p){return is >> p.first >> p.second;} template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;} template<class T> istream& operator , (istream& is, T& val){ return is >> val;} template<class T, class S> ostream& operator << (ostream& os, const pair<T,S>& p){return os << p.first << " " << p.second;} template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(size_t i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":" "); return os;} template<class T> ostream& operator , (ostream& os, const T& val){ return os << " " << val;} template<class H> void print(const H& head){ cout << head; } template<class H, class ... T> void print(const H& head, const T& ... tail){ cout << head << " "; print(tail...); } template<class ... T> void println(const T& ... values){ print(values...); cout << endl; } template<class H> void eprint(const H& head){ cerr << head; } template<class H, class ... T> void eprint(const H& head, const T& ... tail){ cerr << head << " "; eprint(tail...); } template<class ... T> void eprintln(const T& ... values){ eprint(values...); cerr << endl; } class range{ Integer start_, end_, step_; public: struct range_iterator{ Integer val, step_; range_iterator(Integer v, Integer step) : val(v), step_(step) {} Integer operator * (){return val;} void operator ++ (){val += step_;} bool operator != (range_iterator& x){return step_ > 0 ? val < x.val : val > x.val;} }; range(Integer len) : start_(0), end_(len), step_(1) {} range(Integer start, Integer end) : start_(start), end_(end), step_(1) {} range(Integer start, Integer end, Integer step) : start_(start), end_(end), step_(step) {} range_iterator begin(){ return range_iterator(start_, step_); } range_iterator end(){ return range_iterator( end_, step_); } }; inline string operator "" _s (const char* str, size_t size){ return move(string(str)); } constexpr Integer my_pow(Integer x, Integer k, Integer z=1){return k==0 ? z : k==1 ? z*x : (k&1) ? my_pow(x*x,k>>1,z*x) : my_pow(x*x,k>>1,z);} constexpr Integer my_pow_mod(Integer x, Integer k, Integer M, Integer z=1){return k==0 ? z%M : k==1 ? z*x%M : (k&1) ? my_pow_mod(x*x%M,k>>1,M,z*x%M) : my_pow_mod(x*x%M,k>>1,M,z);} constexpr unsigned long long operator "" _ten (unsigned long long value){ return my_pow(10,value); } inline int k_bit(Integer x, int k){return (x>>k)&1;} //0-indexed mt19937 mt(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count()); template<class T> string join(const vector<T>& v, const string& sep){ stringstream ss; for(size_t i=0; i<v.size(); i++){ if(i>0) ss << sep; ss << v[i]; } return ss.str(); } inline string operator * (string s, int k){ string ret; while(k){ if(k&1) ret += s; s += s; k >>= 1; } return ret; } } long long power_mod(long long x, long long y, long long mod){ long long ret = 1; while(y){ if(y&1) ret = (ret*x) % mod; x = (x*x) % mod; y >>= 1; } return ret; } //find k such that x^k = y (mod z) //x and z are co-prime //x^(aH-b) = y (mod z) //x^aH = y * x^b (mod z) long long baby_step_giant_step(long long x, long long y, long long z){ static long long H = sqrt(z) + 1; static set<pair<int,long long>> S; if(S.size()==0) for(long long i=0, w=1; i<H; i++, w=(w*x)%z){ S.insert({w,i}); } long long k = -1; static long long x_H = power_mod(x, H, z); long long y_inv = power_mod(y, z-2, z); for(long long i=1, w=x_H * y_inv; i<=H; i++, w=(w*x_H)%z){ auto itr = S.lower_bound({w+1, 0}); if(itr == S.begin()) continue; itr--; if(itr->first == w){ return H * i - itr->second; } } return k; } int main(){ long long p,r; cin >> p,r; long long q; cin >> q; for(int i=0; i<q; i++){ long long a,b,c; cin >> a,b,c; long long a2_inv = my_pow_mod(2*a%p, p-2, p); long long b_ = (p-b) % p; long long d = (b*b%p - 4*a%p*c%p) % p; if( d<0 ) d += p; long long w = baby_step_giant_step(r,d, p); if( d==0 ){ long long x = b_ * a2_inv % p; println(x); continue; } if( w%2 != 0 ){ println(-1); continue; } long long xa = (b_ + my_pow_mod(r, w/2, p)) * a2_inv % p; long long xb = (b_ - my_pow_mod(r, w/2, p) + p) * a2_inv % p; set<long long> ans; ans.insert(xa); ans.insert(xb); vector<long long> ans_(ans.begin(), ans.end()); println(ans_); } return 0; }