<doocs>0204.Count Primes_1.py
def countPrimes( n: int) -> int:
    primes = [True] * n
    ans = 0
    for i in range(2, n):
        if primes[i]:
            ans += 1
            for j in range(i + i, n, i):
                primes[j] = False
    return ans
def sample_funcname ( var_0 : int ) -> int :
    var_3 = [ True ] * var_0
    var_5 = 0
    for var_8 in range ( 2 , var_0 ) :
        if var_3 [ var_8 ] :
            var_5 += 1
            for var_10 in range ( var_8 + var_8 , var_0 , var_8 ) :
                var_3 [ var_10 ] = False
    return var_5
