結果
問題 | No.1287 えぬけー |
ユーザー | rniya |
提出日時 | 2020-11-13 22:15:34 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,405 bytes |
コンパイル時間 | 2,257 ms |
コンパイル使用メモリ | 208,328 KB |
実行使用メモリ | 14,016 KB |
最終ジャッジ日時 | 2024-07-22 21:04:08 |
合計ジャッジ時間 | 5,624 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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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 | 21 ms
11,356 KB |
testcase_01 | AC | 19 ms
6,944 KB |
testcase_02 | AC | 19 ms
6,940 KB |
testcase_03 | AC | 28 ms
6,940 KB |
testcase_04 | WA | - |
testcase_05 | TLE | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; #define LOCAL #pragma region Macros typedef long long ll; #define ALL(x) (x).begin(),(x).end() const long long MOD=1000000007; // const long long MOD=998244353; const int INF=1e9; const long long IINF=1e18; const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; const char dir[4]={'D','R','U','L'}; template<typename T> istream &operator>>(istream &is,vector<T> &v){ for (T &x:v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os,const vector<T> &v){ for (int i=0;i<v.size();++i){ os << v[i] << (i+1==v.size()?"": " "); } return os; } 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> ostream &operator<<(ostream &os,const map<T,U> &m){ os << '{'; for (auto itr=m.begin();itr!=m.end();++itr){ os << '(' << itr->first << ',' << itr->second << ')'; if (++itr!=m.end()) os << ','; --itr; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const set<T> &s){ os << '{'; for (auto itr=s.begin();itr!=s.end();++itr){ os << *itr; if (++itr!=s.end()) os << ','; --itr; } os << '}'; return os; } void debug_out(){cerr << '\n';} template<class Head,class... Tail> void debug_out(Head&& head,Tail&&... tail){ cerr << head; if (sizeof...(Tail)>0) cerr << ", "; debug_out(move(tail)...); } #ifdef LOCAL #define debug(...) cerr << " ";\ cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\ cerr << " ";\ debug_out(__VA_ARGS__) #else #define debug(...) 42 #endif template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;} template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;} template<class T1,class T2> inline bool chmin(T1 &a,T2 b){ if (a>b){a=b; return true;} return false; } template<class T1,class T2> inline bool chmax(T1 &a,T2 b){ if (a<b){a=b; return true;} return false; } #pragma endregion 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 modpow(long long x,long long n,long long mod){ long long res=1; while (n>0){ if (n&1LL) res=res*x%mod; x=x*x%mod; n>>=1LL; } return res; } long long modinv(long long x,long long p){ return modpow(x,p-3,p); } constexpr int r=5; int main(){ cin.tie(0); ios::sync_with_stdio(false); int T; cin >> T; for (;T--;){ int X,K; cin >> X >> K; if (X==0){ cout << 0 << '\n'; return 0; } ll x=mod_log(r,X,MOD),inv=modinv(K,MOD-1); // debug(x,K,inv); (x*=inv)%=(MOD-1); ll ans=modpow(r,x,MOD); cout << ans << '\n'; } }