how to check nth prime in python
def isprime(n):
    c=0
    for i in range(1,n+1):
        if(n%i==0):
            c=c+1
    if c==2:
        return 1
    else:
        return 0
n=int(input())
c=0
x=1
while(c<=n):
    x=x+1
    for i in range(2,x+1):
        if isprime(i):
            c+=1
print(x)
