Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

// I/O
type Scanner struct {
	sc *bufio.Scanner
}

func NewScanner() *Scanner {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	sc.Buffer(make([]byte, 1024), int(1e+9))
	return &Scanner{sc}
}

func (s *Scanner) nextStr() string {
	s.sc.Scan()
	return s.sc.Text()
}

func (s *Scanner) nextInt() int {
	i, e := strconv.Atoi(s.nextStr())
	if e != nil {
		panic(e)
	}
	return i
}

func (s *Scanner) nextFloat() float64 {
	f, e := strconv.ParseFloat(s.nextStr(), 64)
	if e != nil {
		panic(e)
	}
	return f
}

func (s *Scanner) nextRuneSlice() []rune {
	return []rune(s.nextStr())
}

func (s *Scanner) nextIntSlice(n int) []int {
	res := make([]int, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextInt()
	}
	return res
}

func (s *Scanner) nextFloatSlice(n int) []float64 {
	res := make([]float64, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextFloat()
	}
	return res
}

// Arithmetic
func max(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m < i {
			m = i
		}
	}
	return m
}

func min(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m > i {
			m = i
		}
	}
	return m
}

func abs(x int) int {
	if x > 0 {
		return x
	}
	return -x
}

func pow(x, y int) int {
	res := 1
	for i := 0; i < y; i++ {
		res *= x
	}
	return res
}

func ceil(a, b int) int {
	if a%b == 0 {
		return a / b
	} else {
		return a/b + 1
	}
}

// Sort
type RuneSlice []rune

func (a RuneSlice) Len() int           { return len(a) }
func (a RuneSlice) Less(i, j int) bool { return a[i] < a[j] }
func (a RuneSlice) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }

// Main
func main() {
	sc := NewScanner()
	wtr := bufio.NewWriter(os.Stdout)
	N := sc.nextInt()
	dp := make([]int, N+1)
	dp[0] = 1
	dp[1] = 1
	for i := 2; i <= N; i++ {
		dp[i] = dp[i-1] + dp[i-2]
	}

	fmt.Fprintln(wtr, dp[N])
	wtr.Flush()
}

Python: n = int(input())

table = [0] * 45

table[0] = 1
table[1] = 1
for i in range(2,45):
    table[i] = table[i-1]+table[i-2]

print(table[n])

Python: N = int(input())

def memorize(f) :
    cache = {}
    def helper(*args) :
        if args not in cache :
            cache[args] = f(*args)
        return cache[args]
    return helper

@memorize
def fibonacci(n):
    if n == 0 or n == 1:
        return 1
    res = fibonacci(n - 2) + fibonacci(n - 1)
    return res

print(fibonacci(N))

Python: def fibonacci(F,n):
    F[0] = 1
    F[1] = 1
    for i in range(2,n+1,1):
        F[i] = F[i-1] + F[i-2]
    return F[n]

def main():
    n = int(input())
    F  = [0]*(n+1)
    ans = fibonacci(F,n)
    return ans

print(main())

Python: n=int(input())
def fib(n):
    a,b=1,1
    for i in range(n):
        a,b=b,a+b
    return a
print(fib(n))

Python: def fib(n):
    if n <= 1:
        return 1
    else:
        return fib(n - 1) + fib(n - 2)

n = int(input())
ans = fib(n)

print(ans)

Python: def fibr(n):
    if arr[n] != 0:
        return arr[n]
    if n < 2:
        arr[n] = 1
    else:
        arr[n] = fibr(n-1) + fibr(n-2)
    return arr[n]

n = int(input())
arr = [0 for i in range(n+1)]
print(fibr(n))

Python: n = int(input())
n1 = 1
n2 = 1

for i in range(n):
    n1, n2 = n2, n1+n2

print(n1)

Python: import sys
n=int(input())

if n<=1:
    print(1)
    sys.exit()
else:
    i=1
    a0=1
    a1=1
    while i<=n-1:
        temp=a1
        a1+=a0
        a0=temp
        i+=1
print(a1)

Python: inf = 10**9+7
mod = 10**9+7
n = int(input())
dp = [1 for i in range(n+1)]
for i in range(2,n+1):
    dp[i] = dp[i-2] + dp[i-1]
print(dp[n])

Python: N = int(input())
fib = [1,1]
for i in range(50):
    fib.append(fib[-1]+fib[-2])
print(fib[N])

Python: def fib(n,memo={}):
    if n==0 or n==1:
        return 1
    elif n in memo:
        return memo[n]
    else:
        memo[n]= fib(n-1,memo)+fib(n-2,memo)
        return memo[n]
n=int(input())
print(fib(n))

Python: n = int(input())
pair = [1, 1]

for i in range(n - 1):
    pair[i % 2] = sum(pair)

print(pair[n % 2])

Python: n = int(input())

n_L = [0] * 45

n_L[0] = 1
n_L[1] = 1
for i in range(2,n+1):
    n_L[i] = n_L[i-1] + n_L[i-2]

print(n_L[n])

Python: a=b=1
for _ in range(int(input())):a,b=b,a+b
print(a)

Python: def fib(n):
    F = {}
    F[0], F[1] = 1, 1

    if n == 1 or n == 0:
        return 1

    for i in range(2, n+1):
        F[i] = F[i-1] + F[i-2]
    
    return F[n]

n = int(input())
print(fib(n))

Python: print([1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986, 102334155, 165580141, 267914296, 433494437, 701408733, 1134903170][int(input())])

Python: def fib(n):
    l = [0] * (n+1)
    l[0] = 1
    l[1] = 1
    for i in range(2,n+1):
        l[i] = l[i-2] + l[i-1]
    return l[i]

print(fib(int(input())))

Python: def fib(n):
    n1 = n2 = tmp = 1
    for _ in range(n - 1):
        tmp = n1 + n2
        n1, n2 = n2, tmp
    return tmp

print(fib(int(input())))

Python: def fibonacci(f, n):
    if n == 0 or n == 1:
        f[n] = 1
        return f[n]
    if f[n]:
        return f[n]
    f[n] = fibonacci(f, n - 2) + fibonacci(f, n - 1)
    return f[n]

n = int(input())
f = [None for i in range(n + 1)]
print(fibonacci(f, n))

Python: import numpy as np
import sys
n  = 45
f = [-1 for i in range(45)]

def fib(n):
    global f

    if (n == 0):
        return 1
    elif (n == 1):
        return 1
    elif(f[n] == -1):
        f[n] = fib(n - 1) + fib(n - 2)

    return f[n]

if __name__ == "__main__":


    n = input("input number: ")
    n = int(n)
    #print(type(n))
    print(fib(n))

Python: import numpy as np
def f(n):
    m = np.matrix('1 1 ; 1 0') ** n
    return m.item(0)
print(f(int(input())),end="")

Python: n=int(input())
fib=[0 for _ in range(45)]
fib[0]=1
fib[1]=1
for i in range(2,45):
    fib[i]=fib[i-1]+fib[i-2]
print(fib[n])

Python: n = int(input())
memo = [-1]*(n+1)
memo[0] = 1
memo[1] = 1

def fib(n):
    if memo[n] != -1:
        return memo[n]
    else:
        ans = fib(n-1)+fib(n-2)
        memo[n] = ans
        return ans

print(fib(n))

Python: # -*- coding: utf-8 -*-
import functools


@functools.lru_cache(maxsize=None)
def fib(n):
    if n <= 1:
        return 1
    else:
        return fib(n - 1) + fib(n - 2)


if __name__ == '__main__':
    n = int(input())
    print(fib(n))

Python: n=int(input())

a=[None] * (n+1)
a[0] = 1
a[1] = 1

for i in range(n-1):
    a[i+2]=a[i]+a[i+1]

print(a[n])

Python: n = int(input())
def fib(n):
    m = [1,1]
    if n==0 or n==1:
        m=[1]
    else:
        for k in range(2,n+1):
            m.append(m[-1]+m[-2])
    return m

if n==0:
    l = fib(n)[n]
elif n==1:
    l = fib(n)[n-1]
else:
    l = fib(n)[n]
print(l)

Python: def main():
    N = int(input())
    done = [False for i in range(N + 1)]
    memo = [0 for i in range(N + 1)]

    def do_dp(n):
        if done[n]:
            return memo[n]
        if n == 0:
            return 1
        elif n == 1:
            return 1
        else:
            memo[n] = do_dp(n - 1) + do_dp(n - 2)
            done[n] = True
            return memo[n]
    
    print(do_dp(N))

if __name__ == '__main__':
    main()

Python: n=int(input())

a=1
b=1

while n:
    a,b=b,a+b
    n -=1
    
print(a)

Python: n=int(input())
fib=[1,1]
for i in range(2,n+1):
  fib.append(fib[-1]+fib[-2])
print(fib[-1])