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Legendre_symbol
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serr 2025-01-10 22:03:53 +03:00
parent 828eda168d
commit 3641605982
1 changed files with 1 additions and 1 deletions
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Legendre_symbol.py
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@ -6,7 +6,7 @@ def v(a, b):
return r1 if abs(r1) < abs(r2) else r2 return r1 if abs(r1) < abs(r2) else r2
# Считает значение символа Лежандра # Считает значение символа Лежандра
def solve(a, p): def solve(a, p):
stop_i = (p-1)>>1 + 1 stop_i = (p-1)//2 + 1
cnt = sum(1 for i in range(1, stop_i) if v(a*i, p) < 0) cnt = sum(1 for i in range(1, stop_i) if v(a*i, p) < 0)
return pow(-1, cnt) return pow(-1, cnt)