제출 #445755

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
445755	2021-07-19 13:37:17	hamerin	Phibonacci (kriii2_P)	Pypy 3	1 / 4	61 ms	18328 KiB

P

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M = int(1e9 + 7)
mod = M**3
def ext_euc(a, b):
    if b == 0:
        return (a, 1, 0)
    g, x, y = ext_euc(b, a % b)
    return (g, y, x-(a//b)*y)
def matmul(l, r):
    return [[(l[0][0]*r[0][0]+l[0][1]*r[1][0]) % mod, (l[0][0]*r[0][1]+l[0][1]*r[1][1]) % mod],
            [(l[1][0]*r[0][0]+l[1][1]*r[1][0]) % mod, (l[1][0]*r[0][1]+l[1][1]*r[1][1]) % mod]]
def fibo(n):
    if n == -1:
        return 1
    base = [[1, 1], [1, 0]]
    target = [[1, 0], [0, 1]]
    while n:
        if n % 2:
            target = matmul(target, base)
        base = matmul(base, base)
        n //= 2
    return target[0][1]
 
 
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• Subtask 2: 0 / 3