import sys

read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
sys.setrecursionlimit(10 ** 9)
INF = 1 << 60
MOD = 1000000007


def main():
    N, K = map(int, read().split())

    ans = 0
    while N:
        N //= K
        ans += 1

    print(ans)
    return


if __name__ == '__main__':
    main() import sys sys read = sys.stdin.read read sys.stdin.read sys.stdin sys stdin read readline = sys.stdin.readline readline sys.stdin.readline sys.stdin sys stdin readline readlines = sys.stdin.readlines readlines sys.stdin.readlines sys.stdin sys stdin readlines sys.setrecursionlimit(10 ** 9) sys.setrecursionlimit sys setrecursionlimit 10 ** 9 10 9 INF = 1 << 60 INF 1 << 60 1 60 MOD = 1000000007 MOD 1000000007 def main():
    N, K = map(int, read().split())

    ans = 0
    while N:
        N //= K
        ans += 1

    print(ans)
    return main N, K = map(int, read().split()) N map(int, read().split()) map int read().split() ().split () read split K ans = 0 ans 0 while N:
        N //= K
        ans += 1

     N N //= K N K ans += 1 ans 1 print(ans) print ans return if __name__ == '__main__':
    main() __name__ == '__main__' __name__ '__main__' main() main readline = sys.stdin.readline sys.stdin.readline readline def main():
    N, K = map(int, read().split())

    ans = 0
    while N:
        N //= K
        ans += 1

    print(ans)
    return def main():
    N, K = map(int, read().split())

    ans = 0
    while N:
        N //= K
        ans += 1

    print(ans)
    return main MOD = 1000000007 1000000007 MOD read = sys.stdin.read sys.stdin.read read readlines = sys.stdin.readlines sys.stdin.readlines readlines INF = 1 << 60 1 << 60 INF
import sys

read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
sys.setrecursionlimit(10 ** 9)
INF = 1 << 60
MOD = 1000000007


def main():
    N, K = map(int, read().split())

    ans = 0
    while N:
        N //= K
        ans += 1

    print(ans)
    return


if __name__ == '__main__':
    main()
