結果
| 問題 |
No.1287 えぬけー
|
| コンテスト | |
| ユーザー |
Chanyuh
|
| 提出日時 | 2020-12-30 16:45:15 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 225 ms / 2,000 ms |
| コード長 | 4,650 bytes |
| コンパイル時間 | 1,229 ms |
| コンパイル使用メモリ | 133,328 KB |
| 最終ジャッジ日時 | 2025-01-17 08:35:41 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 5 |
ソースコード
#include<iostream>
#include<array>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<complex>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<utility>
#include<tuple>
#include<cassert>
using namespace std;
typedef long long ll;
typedef unsigned int ui;
const ll mod = 1000000007;
const ll INF = (ll)1000000007 * 1000000007;
typedef pair<int, int> P;
#define stop char nyaa;cin>>nyaa;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define Per(i,sta,n) for(int i=n-1;i>=sta;i--)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
typedef long double ld;
const ld eps = 1e-8;
const ld pi = acos(-1.0);
typedef pair<ll, ll> LP;
int dx[4]={1,-1,0,0};
int dy[4]={0,0,1,-1};
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<int mod>
struct ModInt {
long long x;
static constexpr int MOD = mod;
ModInt() : x(0) {}
ModInt(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
explicit operator int() const {return x;}
ModInt &operator+=(const ModInt &p) {
if((x += p.x) >= mod) x -= mod;
return *this;
}
ModInt &operator-=(const ModInt &p) {
if((x += mod - p.x) >= mod) x -= mod;
return *this;
}
ModInt &operator*=(const ModInt &p) {
x = (int)(1LL * x * p.x % mod);
return *this;
}
ModInt &operator/=(const ModInt &p) {
*this *= p.inverse();
return *this;
}
ModInt operator-() const { return ModInt(-x); }
ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }
ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }
ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }
ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }
ModInt operator%(const ModInt &p) const { return ModInt(0); }
bool operator==(const ModInt &p) const { return x == p.x; }
bool operator!=(const ModInt &p) const { return x != p.x; }
ModInt inverse() const{
int a = x, b = mod, u = 1, v = 0, t;
while(b > 0) {
t = a / b;
a -= t * b;
swap(a, b);
u -= t * v;
swap(u, v);
}
return ModInt(u);
}
ModInt power(long long n) const {
ModInt ret(1), mul(x);
while(n > 0) {
if(n & 1)
ret *= mul;
mul *= mul;
n >>= 1;
}
return ret;
}
ModInt power(const ModInt p) const{
return ((ModInt)x).power(p.x);
}
friend ostream &operator<<(ostream &os, const ModInt<mod> &p) {
return os << p.x;
}
friend istream &operator>>(istream &is, ModInt<mod> &a) {
long long x;
is >> x;
a = ModInt<mod>(x);
return (is);
}
};
using modint = ModInt<mod>;
struct modlog{
ll m=0,MOD,a;
vector<ll> A;
map<ll,int> ma;
modlog(ll a,ll MOD):a(a),MOD(MOD){
while(m*m<MOD) m++;
//cout << a << " " << m << endl;
ll s=1;
rep(i,m){
ma[s]=i+1;
s*=a;s%=MOD;
}
A.resize(m+1);
A[0]=1;
A[1]=power(power(a,m),MOD-2);
Rep(i,1,m){
A[i+1]=A[1]*A[i]%MOD;
}
}
ll power(ll a,ll x){
a%=MOD;
if(x==0) return 1;
ll res=1;
if(x%2) res=a;
return power(a*a%MOD,(x >> 1))*res%MOD;
}
ll log(ll b){//b==1の時以外は最小のもの
ll s=0,t=-1;
while(s<=m){
if(ma[b*A[s]%MOD]>=1) {
t=ma[b*A[s]%MOD]-1;
if(s==0 && t==0) {
s++;
continue;
}
break;
}
s++;
}
if(t==-1) return -1;
return s*m+t;
}
};
//gcd(a,b)を返す
//a*x+b*y==gcd(a,b)なるx,yが格納される
ll extGCD(ll a,ll b,ll &x,ll &y){
if(b==0) {
x=1;y=0;return a;
}
ll d=extGCD(b,a%b,y,x);
y-=a/b*x;
return d;
}
ll x,k;
modlog mlog(5,mod);
void solve(){
if(x==0) {
cout << 0 << endl;
return;
}
ll a,b;extGCD(k,mod-1,a,b);
a=(a%(mod-1))+mod-1;
cout << ((modint)x).power(a) << endl;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cout << fixed << setprecision(50);
int t;cin >> t;
rep(i,t) {
cin >> x >> k;
solve();
}
}
Chanyuh