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 02:43:59 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 3,642 ms / 4,000 ms |
コード長 | 5,280 bytes |
コンパイル時間 | 1,502 ms |
コンパイル使用メモリ | 116,116 KB |
実行使用メモリ | 224,548 KB |
最終ジャッジ日時 | 2024-10-10 20:27:03 |
合計ジャッジ時間 | 25,769 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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 3 ms
5,248 KB |
testcase_03 | AC | 5 ms
5,248 KB |
testcase_04 | AC | 5 ms
5,248 KB |
testcase_05 | AC | 10 ms
5,248 KB |
testcase_06 | AC | 14 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 2 ms
5,248 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 2 ms
5,248 KB |
testcase_17 | AC | 4 ms
5,248 KB |
testcase_18 | AC | 6 ms
5,248 KB |
testcase_19 | AC | 6 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 | 3 ms
5,248 KB |
testcase_24 | AC | 5 ms
5,248 KB |
testcase_25 | AC | 4 ms
5,248 KB |
testcase_26 | AC | 5 ms
5,248 KB |
testcase_27 | AC | 526 ms
42,728 KB |
testcase_28 | AC | 522 ms
42,604 KB |
testcase_29 | AC | 92 ms
9,860 KB |
testcase_30 | AC | 388 ms
30,952 KB |
testcase_31 | AC | 88 ms
9,724 KB |
testcase_32 | AC | 391 ms
30,448 KB |
testcase_33 | AC | 530 ms
42,604 KB |
testcase_34 | AC | 302 ms
26,860 KB |
testcase_35 | AC | 119 ms
13,120 KB |
testcase_36 | AC | 236 ms
22,920 KB |
testcase_37 | AC | 3,642 ms
224,548 KB |
testcase_38 | AC | 2,829 ms
183,332 KB |
testcase_39 | AC | 813 ms
56,320 KB |
testcase_40 | AC | 2,284 ms
165,000 KB |
testcase_41 | AC | 680 ms
48,888 KB |
testcase_42 | AC | 2,948 ms
187,300 KB |
testcase_43 | AC | 762 ms
56,192 KB |
testcase_44 | AC | 1,300 ms
90,408 KB |
testcase_45 | AC | 1,034 ms
82,936 KB |
testcase_46 | AC | 3,292 ms
208,420 KB |
testcase_47 | AC | 2 ms
5,248 KB |
testcase_48 | AC | 2 ms
5,248 KB |
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; } #include <unordered_map> //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 long long H = pow(z, 0.75) + 1; static long long W = z/H + 1; // static set<pair<int,long long>> S; static unordered_map<long long, 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}); S[w] = i; } static unordered_map<long long, long long> memo; if(memo.count(y)){ return memo[y]; } 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 % z; i<=W; 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; // } if( S.count(w) ){ return memo[y] = H*i - S[w]; } } return memo[y] = 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; scanf("%lld%lld%lld", &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; if( d==0 ){ long long x = b_ * a2_inv % p; println(x); continue; } long long w = baby_step_giant_step(r,d, p); 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; if(xa!=xb) println( min(xa,xb), max(xa,xb) ); else println(xa); } return 0; }