imyxh

user@host:~$ glxinfo
name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 

imyxh

Computer Information:
    Manufacturer:  Unknown
    Model:  Unknown
    Form Factor: Laptop
    No Touch Input Detected

Processor Information:
    CPU Vendor:  GenuineIntel
    CPU Brand:         Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz
    CPU Family:  0x6

imyxh

from sys import stdin
from math import ceil, floor

f = list(map(int, stdin.readline().split(' ')))
print(ceil((f[0]-1)/floor(f[1]/f[2])))