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  3. Project Euler #25: N-digit Fibonacci number
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Project Euler #25: N-digit Fibonacci number

  • vidush_rk11
     + 0 comments
    import sys
sys.set_int_max_str_digits(6000)

li=[1,1]
answers=[0,1,]
x=2
max_len=1

# I simultaneously calculate the fibonacci numbers and set an answers list corresponding to the nth term which has digits >= that indice of the list
while max_len<5000:
    x+=1
    new_number=li[-2]+li[-1]
    length=len(str(new_number))
    li.append(new_number)
    if length>max_len:
        answers+=[x]*(length-max_len)
        max_len=length
        
for _ in range(int(input())):
    n=int(input())
    print(answers[n])