A, B, S = map(int, input().split())

# Scenario 1: Use A directly
scenario1 = abs(A - S) + S

# Scenario 2: Use B first, then A
min_scenario2 = float('inf')
for F in range(1, 101):
    sum_moves = abs(B - S) + abs(F - S) + abs(A - F) + F
    if sum_moves < min_scenario2:
        min_scenario2 = sum_moves

# The minimal total moves
total = min(scenario1, min_scenario2)
print(total)