# A small frog wants to get to the other side of the road. The frog is currently located at position X and 
# wants to get to a position greater than or equal to Y. 
# The small frog always jumps a fixed distance, D.
# Count the minimal number of jumps that the small frog 
# must perform to reach its target.
import math

def solution(x, y, d):
    steps = math.ceil((y-x)/d)
    return steps

print(solution(10, 85, 30))
# import math
# print(math.ceil(2.5))