結果

問題 No.551 夏休みの思い出(2)
ユーザー 👑 Kazun
提出日時 2020-09-01 02:29:27
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 344 ms / 4,000 ms
コード長 4,080 bytes
コンパイル時間 275 ms
コンパイル使用メモリ 82,304 KB
実行使用メモリ 80,500 KB
最終ジャッジ日時 2024-11-17 03:48:35
合計ジャッジ時間 10,032 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 47
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

class Modulo_Error(Exception):
pass
class Modulo():
def __init__(self,a,n):
self.a=a%n
self.n=n
def __str__(self):
return "{} (mod {})".format(self.a,self.n)
#+,-
def __pos__(self):
return self
def __neg__(self):
return Modulo(-self.a,self.n)
#,
def __eq__(self,other):
if isinstance(other,Modulo):
return (self.a==other.a) and (self.n==other.n)
elif isinstance(other,int):
return (self-other).a==0
def __neq__(self,other):
return not(self==other)
#
def __add__(self,other):
if isinstance(other,Modulo):
if self.n!=other.n:
raise Modulo_Error(".")
return Modulo(self.a+other.a,self.n)
elif isinstance(other,int):
return Modulo(self.a+other,self.n)
def __radd__(self,other):
if isinstance(other,int):
return Modulo(self.a+other,self.n)
#
def __sub__(self,other):
return self+(-other)
def __rsub__(self,other):
if isinstance(other,int):
return -self+other
#
def __mul__(self,other):
if isinstance(other,Modulo):
if self.n!=other.n:
raise Modulo_Error(".")
return Modulo(self.a*other.a,self.n)
elif isinstance(other,int):
return Modulo(self.a*other,self.n)
def __rmul__(self,other):
if isinstance(other,int):
return Modulo(self.a*other,self.n)
#Modulo
def inverse(self):
return self.Modulo_Inverse()
def Modulo_Inverse(self):
x0, y0, x1, y1 = 1, 0, 0, 1
a,b=self.a,self.n
while b != 0:
q, a, b = a // b, b, a % b
x0, x1 = x1, x0 - q * x1
y0, y1 = y1, y0 - q * y1
if a!=1:
raise Modulo_Error("{}".format(self))
else:
return Modulo(x0,self.n)
#
def __truediv__(self,other):
return self*(other.Modulo_Inverse())
def __rtruediv__(self,other):
return other*(self.Modulo_Inverse())
#
def __pow__(self,m):
u=abs(m)
r=Modulo(1,self.n)
while u>0:
if u%2==1:
r*=self
self*=self
u=u>>1
if m>=0:
return r
else:
return r.Modulo_Inverse()
#
def Legendre(X):
"""(a/p).
.
"""
if X==0:
return 0
elif X**((X.n-1)//2)==1:
return 1
else:
return -1
#
def sqrt(X,All=False):
"""X=a (mod p),r*r=a (mod p)r.
p
None
"""
if Legendre(X)==-1:
return None
from random import randint as ri
if X==0:
return X
elif X.n==2:
return X
elif X.n%4==3:
return X**((X.n+1)//4)
p=X.n
u=2
s=1
while (p-1)%(2*u)==0:
u*=2
s+=1
q=(p-1)//u
z=Modulo(0,p)
while z**((p-1)//2)!=-1:
z=Modulo(ri(1,p-1),p)
m,c,t,r=s,z**q,X**q,X**((q+1)//2)
while m>1:
if t**(2**(m-2))==1:
c=c*c
m=m-1
else:
c,t,r,m=c*c,c*c*t,c*r,m-1
if All:
return (r,-r)
else:
return r
#================================================
P,R=map(int,input().split())
Q=int(input())
X=[""]*Q
for i in range(Q):
A,B,C=map(lambda x:Modulo(int(x),P),input().split())
D=B*B-4*A*C
L=Legendre(D)
if L==0:
X[i]=str((-B/(2*A)).a)
elif L==1:
T=sqrt(D)
alpha=((-B+T)/(2*A)).a
beta=((-B-T)/(2*A)).a
if alpha>beta:
alpha,beta=beta,alpha
X[i]=" ".join(map(str,[alpha,beta]))
else:
X[i]="-1"
print("\n".join(X))
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