Problem:
 Score : 100 points    Problem Statement There are N students in a school.  We will divide these students into some groups, and in each group they will discuss some themes.  You think that groups consisting of two or less students cannot have an effective discussion, so you want to have as many groups consisting of three or more students as possible.  Divide the students so that the number of groups consisting of three or more students is maximized.      Constraints  1 \leq N \leq 1000  All input values are integers.         Input Input is given from Standard Input in the following format:  N       Output If you can form at most x groups consisting of three or more students, print x .        Sample Input 1 8      Sample Output 1 2  For example, you can form a group of three students and another of five students.       Sample Input 2 2      Sample Output 2 0  Sometimes you cannot form any group consisting of three or more students, regardless of how you divide the students.       Sample Input 3 9      Sample Output 3 3

Solution (Python):
n = int(input())
ans = n // 3
print(ans)

Solution (Python):
print(int(input())//3)

Solution (Python):
n=int(input())
if n%3==0:
    print(n//3)
else:
    print(n//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
def main():
    n = int(input())
    print(n // 3)


if __name__ == '__main__':
    main()

Solution (Python):
print(int(input())//3)

Solution (Python):
x = int(input())
print(x//3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):

N = int(input())
if N <= 2:
  print(0)
else:
  print(int(N // 3))

Solution (Python):
n=int(input())

if n>=3:
    print(n//3)
else:
    print(0)

Solution (Python):



def main():
    """Function."""
    n = int(input())
    print(n//3)


if __name__ == "__main__":
    main()

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
a = int(input())
print(int(a/3))

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):

print(int(input())//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
a = int(input())
print(a // 3)

Solution (Python):
a=int(input())
print(a//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
a=int(input())
ans=int(a/3)
print(ans)

Solution (Python):
n=int(input())
print(int(n/3))

Solution (Python):
n = int(input())

print(int(n/3))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N = int(input())

group3 = N//3

print(group3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N=int(input())

print(int(N/3))

Solution (Python):
print input()/3

Solution (Python):
print input()/3

Solution (Python):
n = int(input())

print(n//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
if n<6:
    print(0)
else:
    print(n//3)

Solution (Python):
n = int(input())

print(n // 3)

Solution (Python):
n = int(input())
print(int(n/3))

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):
a = int(input())
print(int(a / 3))

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
N = int(input())

print(int(N//3))

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
print(int(int(input())/3))

Solution (Python):
import math
N = int(input())
ans = math.floor(N/3)
print(ans)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = input()
MIN_GNUM = 3
print N / MIN_GNUM

Solution (Python):
N = int(input())

ans = N // 3
print(ans)

Solution (Python):
print(int(input())//3)

Solution (Python):
print( int(input())//3 )

Solution (Python):

N = int(input())
print(N//3)

Solution (Python):
print(int(int(input()) / 3))

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())
ans = N//3
print(ans)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
if N % 3 >= 1:
	print(N // 3)
else:
	print(N//3)

Solution (Python):
a = int(input())
if a%3==0:
    print(a//3)
else: 
    print(int(a//3))

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
N = int(input())
print((N // 3))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):


a  = int( input())

print(a//3)

Solution (Python):
n = int(input())

if n == 1 and n == 2:
    print(0)
elif n == 4 and n == 5:
    print(1)
else:
    print(n//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
n = int(input())

print(n//3)

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):

print(int(input())//3)

Solution (Python):
n=int(input())
print((n//3))

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

M = N//3

print(M)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
print(int(int(input())/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())

print(n // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
n = int(input())
print(int(n / 3))

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
n = int(input())
print(int(n/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N = int(input())

ans = int(N / 3)

print(ans)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

print(N//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(int(n // 3))

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
n=int(input());print(n//3)

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
N = int(raw_input())
print N / 3

Solution (Python):
def main():
    N = int(input())
    print(N // 3)

if __name__ == '__main__':
    main()

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
print(int(int(input())/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
N = int(input())
x = int(N/3)
print(x)

Solution (Python):
N = int(input())
print(N //3)

Solution (Python):

n=int(input())
print(n//3)

Solution (Python):
n = int(input())
ans = n // 3 
print(ans)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print int(input())/3

Solution (Python):
print(int(int(input()) / 3))

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
N = int(input())

print(N//3)

Solution (Python):
N=int(input())
print(int(N/3))

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):


from collections import defaultdict, Counter
from itertools import product, groupby, count, permutations, combinations
from math import pi, sqrt
from collections import deque
from bisect import bisect, bisect_left, bisect_right
from string import ascii_lowercase
from functools import lru_cache
import sys
sys.setrecursionlimit(10000)
INF = float("inf")
YES, Yes, yes, NO, No, no = "YES", "Yes", "yes", "NO", "No", "no"
dy4, dx4 = [0, 1, 0, -1], [1, 0, -1, 0]


def inside(y, x, H, W):
    return 0 <= y < H and 0 <= x < W


def main():
    N = int(input())
    print(N // 3)

if __name__ == '__main__':
    main()

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
print((int(input()))//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
x=int(input())


print(x//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
a = int(input())
print(a//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())

print(n//3)

Solution (Python):
N = int(input())

x = 0

if N > 2:
  x = N//3
  
print(x)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):


def main():
    n = int(input())

    print(n//3)

if __name__ == '__main__':
    main()

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
sum = 0
while N>2:
    N = N-3
    sum+=1
print(sum)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
print(int(input())//3)

Solution (Python):

a=int(input())

print(a//3)

Solution (Python):
import math
n = int(input())
print(math.floor(n / 3))

Solution (Python):
print int(raw_input()) / 3

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

print(int(N // 3))

Solution (Python):
N = int(input())
print(int(N//3))

Solution (Python):
A=int(input())
print(A//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N=int(input())
if N%3==0:
    print(N//3)
else:
    print(int((N+3-1)/3)-1)

Solution (Python):
N = int(input())
print(int(N / 3))

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
import math
N = int(input())
print(math.floor(N/3))

Solution (Python):
N = int(input())
if N<3:
	print(int(0))
else:
	print(N//3)

Solution (Python):
i=int(input())
print(i//3)

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):
x=int(input())
print(x//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())

print(n//3)

Solution (Python):
x=int(input())
print(x//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):
N = int(input())
if N >= 3:
  print((N-3)//3 + 1)
else:
  print(0)

Solution (Python):
print(int(input())//3)

Solution (Python):
x=int(raw_input())
print x/3

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

if N < 3:
    print(0)
else:
    print(N//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

print(int(N/3))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N=int(input())
ans=N//3
print(ans)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N=int(input())

print(N//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N=input()
x=int(N)//3
print(x)

Solution (Python):

a = int(input())
b = a%3
c = a//3
if a >= 3:
    print(c)
else:
    print(int(0))

Solution (Python):

a = int(input())
b = a%3
c = a//3
if a > 3:
    print(c)
else:
    print(int(0))

Solution (Python):
print('{}'.format(int(input())//3))

Solution (Python):
print(int(input())//3)

Solution (Python):


N = int(input())

print(int(N / 3))

Solution (Python):
print(int(int(input())/3))

Solution (Python):
import math


N = int(input())
N = math.ceil(N)

print(math.floor(N/3))

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
num = int( input() )
group = 0

while( num >= 3 ):
    num -= 3
    group += 1

print( group )

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
while True:
    N = int(input())
    if N >= 1 and N <= 1000:
        break
if N < 3:
    print(0)
if N >= 3:
    print(int(N/3))

Solution (Python):



N = int(input())
i=0

for i in range(N):
    N = N - 3
    if(N<0):
        break
print(i)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())

print(int(N/3))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print int(raw_input()) / 3

Solution (Python):
n = int(input())
print(int(n/3))

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):

n = int(input())
print(n // 3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print("%d" % (int(input()) / 3))

Solution (Python):
n  = int(input())
print(int(n/3))

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):

N = int(input())

print(N//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
print((lambda x: x // 3)(int(input())))

Solution (Python):
N = int(input())
NN = N // 3
print(NN)

Solution (Python):
num = int(input())
saidaisuu = int(num/3)
print(saidaisuu)

Solution (Python):
print(int(input())//3)

Solution (Python):
print (int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
n = int(input())

print(int(n/3))

Solution (Python):
def main():
    N = int(input())
    print(N // 3)

if __name__ == '__main__':
    main()

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())

print(int(N/3))

Solution (Python):
print(int(int(input())/3))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N = input()
m = int(int(N)/3)
print(m)

Solution (Python):
print(int(input())//3)

Solution (Python):

people = int(input())
group= people // 3
print(group)

Solution (Python):
a = int(input())
print(a//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
import sys
import math
import collections
import itertools
import array
import inspect


sys.setrecursionlimit(10000)


def chkprint(*args):
    names = {id(v):k for k,v in inspect.currentframe().f_back.f_locals.items()}
    print(', '.join(names.get(id(arg),'???')+' = '+repr(arg) for arg in args))


def to_bin(x):
    return bin(x)[2:]



dp = None

def main():
    N = int(input())
    print(N//3)

main()

Solution (Python):
print(int(int(input())/3))

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):


N = int(input())
print(int(N/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(int(n/3))

Solution (Python):
a = int(input())
print(a // 3)

Solution (Python):
n = int(input())
solution = n // 3
print(solution)

Solution (Python):
s = input()
print(int(s)//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
N = int(input())

print(str(N//3))

Solution (Python):


n = int(input())

print(n // 3)

Solution (Python):
N=int(input())
print(int(N/3))

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
N = int(input())

print(N//3)

Solution (Python):
import re
import sys

if __name__ == '__main__':
    N = input()
    a = N / 3
    print a

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
x = int(input()) // 3
print(x)

Solution (Python):
N=int(input())

print(int(N/3))

Solution (Python):
x = int(input())
y = x // 3


if x < 3:
    print(0)
else:
    print(y)

Solution (Python):
x = input()
print(int(int(x)/3))

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
n = int(input())

print(n // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print input()/3

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
n = int(input())
ans = 0
if n > 2:
    for i in range(3, n + 1):
        k = n // i
        if ans < k:
            ans = k
print(ans)

Solution (Python):



import math
import re
import sys


def getinputdata():

    
    array_result = []
    
    data = input()

    
    array_result.append(data.split(" "))

    flg = 1

    try:


        while flg:

            data = input()

            array_temp = []

            if(data != ""):
                
                array_result.append(data.split(" "))

                flg = 1

            else:

                flg = 0
    finally:


        return array_result




arr_data = getinputdata()

n=int(arr_data[0][0])


print(n//3)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
a=int(input())
print(a//3)

Solution (Python):
N=int(input())

num=int(N/3)

print(num)

Solution (Python):
a = int(input())
def more_than_three(a):
    if a < 3:
        return 0
    else:
        return a//3
print(more_than_three(a))

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
n = int(input(""))
print(n//3)

Solution (Python):
print(int(int(input())/3))

Solution (Python):




N = int(input())

print(N//3)

Solution (Python):




N = int(input())

print(N//3)

Solution (Python):
N = int(input())
print((N-N%3)//3)

Solution (Python):
a = int(input())
b = int(a / 3)
print(b)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
x = int(input())
print(x//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
a=int(input())
print(a//3)

Solution (Python):
n = int(input())

if n < 3:
  print(0)
else:
  print(n // 3)

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
N = int(input())
a = int(N/3)
print(a)

Solution (Python):
import math
N = int(input())
g = N / 3
print(math.floor(g))

Solution (Python):
n = int(input())
a = n // 3

print(a)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N=int(input())
NCount = 0
while N >=0:
    NCount+= 1
    N -=3
print(NCount-1)

Solution (Python):
N = int(input())
if N % 3 == 2:
    x = (N - 2) // 3
elif N % 3 == 1:
    x = (N - 1) // 3
else:
    x = N // 3
 
print(x)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
if __name__ == '__main__':
    N = int(input())
    print(N // 3)

Solution (Python):


def solve(n):
    return int(n / 3)

def main():
    n = int(input())
    print(solve(n))

if __name__ == '__main__':
    main()

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
print (int(input())//3)

Solution (Python):

T=int(input())
N=int(T/3)



print(N)

quit()

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
a = int(input())
print("{}".format(a//3))

Solution (Python):
from collections import defaultdict, Counter
from itertools import product, groupby, count, permutations, combinations
from math import pi, sqrt
from collections import deque
from bisect import bisect, bisect_left, bisect_right
from string import ascii_lowercase
from functools import lru_cache
INF = float("inf")
import sys
sys.setrecursionlimit(10000)


def solve(N):
    return N // 3


def main():
    N = int(input())
    print(solve(N))


if __name__ == '__main__':
    main()

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
N=input()
N=int(N)
answer = int(N/3)
print(answer)

Solution (Python):
from math import floor

N=int(input())
x=floor(N/3)
print(x)

Solution (Python):
def main():
    N = int(input() )
    result = int(N / 3)
    print(result)
    
if __name__=="__main__":
    main()

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):

N = int(input())
print (int(N/3))

Solution (Python):
import sys

with sys.stdin as f:
    s_input = f.read()

    n = int(s_input)
    
    print(n // 3)
        
sys.exit(0)

Solution (Python):
a = int(input())
print(a//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
import numpy as np

N = int(input())

print(int(np.floor(N/3)))

Solution (Python):
x = input()
y = int(x)
print(y // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
N = int(raw_input())
a = N/3
print a

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
N=int(input())
print (int(N/3))

Solution (Python):
print( (int(input()))//3)

Solution (Python):


n=int(raw_input())
res=n/3
print res

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input())//3)

Solution (Python):

import math
if __name__ == "__main__":
    n = int(input())
    print(math.floor(n/3))

Solution (Python):


N = int(input())

g = N // 3

print("{}".format(g))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N = int(input())

print(N//3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
 
import math

if 1 <= n <= 1000:
    x = n/3
    x = math.floor(x)
    print(x)

Solution (Python):
n = int(input())

print(n//3)

Solution (Python):
x = int(input())
y = int(x/3)
print(y)

Solution (Python):
N=int(input())
print(int(N/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
import math

N = float(input())
print(math.floor(N / 3))

Solution (Python):
print input() / 3

Solution (Python):
N = int(input())
import math
print(math.floor(N/3))

Solution (Python):
n = int(input())
print(n // 3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N = int(input())
ans = N // 3
print(ans)

Solution (Python):
N=int(input())
print(int(N/3))

Solution (Python):
import math
import numpy as np
from operator import mul



















N = int(input())
x = math.floor(N/3)
print(x)

Solution (Python):
if __name__ =='__main__':
    N = int(input())

    print(N // 3)

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())
b = 0
for a in range(n):
    if n  > 2:
        b += 1
    n -= 3
print(b)

Solution (Python):

n = int(input())
print(int(n/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
a = int(raw_input())
m = int(a / 3)
print(m)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n=int(input())
print(n//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
ip = int(input())

ans = ip / 3
print(int(ans))

Solution (Python):


print(int(input())//3)

Solution (Python):
N=int(input())
i=0
while N>=3:
	N-=3
	i+=1
print(i)

Solution (Python):
def main():
    N = int(input().strip())
    ret = N // 3
    return ret
if __name__ == '__main__':
    print(main())

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N = int(input())

print(N//3)

Solution (Python):
N = int(input())

print(N//3)

Solution (Python):
N = int(raw_input())

k = N / 3

print k

Solution (Python):
def solve():
    print(int(input())//3)
    
solve()

Solution (Python):



n = int(input())

print( n//3 )

Solution (Python):
n = int(input())
group = 0
if n%3==0:
    group = n/3
elif n%3==1:
    group = (n-1)/3
else:
    group = (n-2)/3
print(int(group))

Solution (Python):
print(int(input())//3)

Solution (Python):
print((int(input()))//3)

Solution (Python):
print(int(input())//3)

Solution (Python):
N = int(input())
out = N // 3
print(out)

Solution (Python):

N = int(input())
print(N // 3)

Solution (Python):
N=int(input())
print(int(N/3))

Solution (Python):
print(int(input())//3)

Solution (Python):
n = int(input())                                                                                                                    

print(n // 3)

Solution (Python):
x = int(input())
print(x // 3)

Solution (Python):
N=int(input())
print(int(N/3))

Solution (Python):
n = int(input())
print (n//3)

Solution (Python):
n = int(input())
print(int(n / 3))

Solution (Python):
N = input()
x = int(N) / 3
print(int(x))

Solution (Python):
N = int(input())
Num_of_Group = int(N/3)
print(Num_of_Group)

Solution (Python):
N = int(input())
group = N / 3
print(int(group))

Solution (Python):
N = int(input())
print(N/3)

Solution (Python):
n = int(input())
a = int(n/3)
print(a)

Solution (Python):

a = int(raw_input())
print (a/3)

Solution (Python):
n = int(input())

if n < 3:
    print(0)
else:
    print(n // 3)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
print(int(int(input())/3))

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
print int(raw_input())/3

Solution (Python):
N = int(input())
s = 1
while N >= 6:
    N -= 3
    s += 1
if N < 3:
    s = 0
print(s)

Solution (Python):
n=int(input())

print(n//3)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N = int(input())						

print(N//3)

Solution (Python):



def main():
    print(int(input()) // 3)


if __name__ == '__main__':
    main()

Solution (Python):
if __name__ == '__main__':
    students = int(input())

    group_count = int(students / 3)
    print(group_count)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
n=int(input())
print(int(n/3))

Solution (Python):
print int(input())//3

Solution (Python):
print(int(input()) // 3)

Solution (Python):
num=int(input())

if num<=2:
    print(0)
elif num%3==0:
    print(num//3)
elif num%3==1:
    print(num//3)
else:
    print(num//3)

Solution (Python):
N = int(input())
ans =0
if N<=2:
    print('0')
else:
    ans=N//3
    print(ans)

Solution (Python):
N = int(input())

quo = N // 3

print(quo)

Solution (Python):
N=int(input())
print(N//3)

Solution (Python):
N=int(input())

if N<3:
    A = 0
else :
    A = N//3

print(A)

Solution (Python):
n=int(input())
a=n%3
b=n-a
c=b//3
print(c)

Solution (Python):
n = 0

n = input()

ans = 0

ans = n/3

print(ans)

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):


a = int(input())

if a < 2:
    print(0)
elif a%3 == 0:
    print(int(a/3))
elif a%3 == 1:
    print(int(a/3))
else:
    print(int(a/3))

Solution (Python):
N = int(input())
i = 0
while N >= 2:
    N = N - 3
    if N >= 0:
        i = i + 1
print(i)

Solution (Python):
print  int(raw_input()) / 3

Solution (Python):
import numpy as np
import scipy as sp

N = int(input())

a = N // 3

print(a)

Solution (Python):
n = int(input())
out = int(n / 3)
print(out)

Solution (Python):
n = input()
print (n/3)

Solution (Python):



X = input()
print X//3

Solution (Python):
N=int(raw_input())

print N/3

Solution (Python):
import math

n = int(input())
d = n / 3

if d == 0:
    print('0')
else:
    print(math.floor(d))

Solution (Python):
N = int(input())
if N % 3 == 0:
    print(int(N/3))
else:
    print(int(N//3))

Solution (Python):
def main():
    N = int(input())
    cnt = 0
    cnt = N // 3
    
     
    print(cnt)
if __name__ == '__main__':
    main()

Solution (Python):
if __name__ == "__main__":
    N = int(input())
    print (N // 3)

Solution (Python):
X = int(input())
print(int(X/3))

Solution (Python):

a = int(raw_input())
print (a/3)

Solution (Python):
n=int(input())
if n<=2:
    print(0)
else:
    print(n//3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
if __name__ == '__main__':
    n = int(input())
    result = int(n / 3)
    print(result)

Solution (Python):
N = int(input())
Ans = N // 3

print(Ans)

Solution (Python):

N = int(input())


if N<3:
    print(0)
else:
    print(N//3)

Solution (Python):
n=int(input())
print (int(((n-n%3)/3)))

Solution (Python):
n = int(input())

if n <= 2:
    print(0)
else:
    print(int(n/3))

Solution (Python):
N = int(input())
print(int((N-N%3)/3))

Solution (Python):
N = int(input())
print(N // 3)

Solution (Python):
N = int(input())

if N > 2:
    print(N//3)

else:
    print(0)

Solution (Python):
n = int(input())
if n % 3 == 0:
    g = int(n/3)
elif n % 3 == 1:
    g = int(n//3)
elif n % 3 == 2:
    g = int(n//3)
if n == 1:
    g = 0
print(g)

Solution (Python):
n=int(input())
a=0
a=n//3
print(a)

Solution (Python):
from math import *

n = int(input())
a = ceil(n // 3)
print(a)

Solution (Python):

N = int(input())

A=N%3
if A>3:
    print(0)
else:
    B=(N-A)/3
    print(int(B))

Solution (Python):
n = input()

out = int(int(n)/3)
print(out)

Solution (Python):
print(int(int(input())/3))

Solution (Python):
students = int(input())

print(students // 3)

Solution (Python):
n = int(input())

i = n // 3
print(i)

Solution (Python):
n = input()
N = int(n)
ans = N // 3

print(ans)

Solution (Python):
_num = int(input())
print(_num // 3)

Solution (Python):
n=int(input())
print(int(n//3))

Solution (Python):
print(int(input()) // 3)

Solution (Python):
n = int(input())
print(int(n / 3))

Solution (Python):
print(int(int(input()) / 3))

Solution (Python):
N = int(input())

print(N // 3)

Solution (Python):
def main():
    N = int(input())
    print(N // 3)

main()

Solution (Python):
n = int(input())
print(int(n/3))

Solution (Python):
N = int(input())
print(int(N/3))

Solution (Python):

import math

if __name__ == "__main__":
    N = int(input())
    print(int(math.floor(N/3)))

Solution (Python):
import math
S = int(input())
ans=math.floor(S/3)
print(ans)

Solution (Python):
n = int(input())
if n < 3:
    print(0)
else:
    print(n // 3)

Solution (Python):
n = int(input())
print(n//3)

Solution (Python):
print(int(int(input())/3))

Solution (Python):
N = int(input())
x = int((N / 3))
print(x)

Solution (Python):
import random
import numpy
import sys
import math

N=float(input()) 
print(math.floor(N/3))

Solution (Python):
if __name__ == "__main__":
    N = int(input())
    ans = N // 3
    print(ans)

Solution (Python):
N = int(input())
print(N//3)

Solution (Python):
n = int(input())
x = n // 3
print(x)

Solution (Python):
num=int(input(''))
print(num//3)

Solution (Python):
print(int(input()) // 3)

Solution (Python):
a = int(input())

print(a // 3 if a > 3  else 0)

Solution (Python):
n=int(input())
p=n//3
print(p)

Solution (Python):
n = int(input())

count = 0

if n <= 2:
    print(count)
else:
    while n >= 3:
        n -= 3
        count += 1
    print(count)

Solution (Python):
N = int(input())
print(int(N / 3))

Solution (Python):
N = int(input())
print(int(N/3))