n = int(input('请输入参加游戏的人数：'))
num = []
for i in range(n):
    num.append(i+1)

i=0
k=0
m=0
while m<n-1:
    if num[i]!=0:
        k+=1
    if k==7:
        num[i]=0
        k=0
        m+=1
    i+=1
    if i==n:
        i=0
i=0
while num[i]==0:
    i+=1
print(num[i])