l = list(map(int, input().split()))
l.sort()
res = (l[1]-l[0])+(l[2]-l[1])
print(res)1303D - Fill The Bag | 1198B - Welfare State |
1739B - Array Recovery | 1739C - Card Game |
1739A - Immobile Knight | 1739D - Reset K Edges |
817B - Makes And The Product | 1452C - Two Brackets |
400B - Inna and New Matrix of Candies | 870B - Maximum of Maximums of Minimums |
1600E - Array Game | 1149A - Prefix Sum Primes |
277A - Learning Languages | 769A - Year of University Entrance |
1738A - Glory Addicts | 1738C - Even Number Addicts |
1064B - Equations of Mathematical Magic | 384A - Coder |
1738B - Prefix Sum Addicts | 1352D - Alice Bob and Candies |
1316D - Nash Matrix | 1548B - Integers Have Friends |
348A - Mafia | 315B - Sereja and Array |
204A - Little Elephant and Interval | 385B - Bear and Strings |
114C - Grammar Lessons | 1427A - Avoiding Zero |
583A - Asphalting Roads | 1358B - Maria Breaks the Self-isolation |