"""
[25784: Easy-to-Solve Expressions ](https://www.acmicpc.net/problem/25784)
Tier: Bronze 5
Category: 구현
"""
def solution():
a, b, c = map(int, input().split())
if a + b == c or a + c == b or b + c == a:
return 1
if a * b == c or a * c == b or b * c == a:
return 2
return 3
if __name__ == '__main__':
print(solution())