Introduction to Python

Functions with return value

Printing in the output is great, but most of the useful functions that we have used before like max() or math.sqrt() do not print a value. They return a result. max() returns the maximum among all the values passed to it. math.sqrt() returns the square root of a number which we can use afterward in our program.
To return a value from a function, we can use the return command:
def celsius2fahrenheit(degrees):
	return 9 / 5 * degrees + 32

print(celsius2fahrenheit(10))                            # 50.0
print(celsius2fahrenheit(10) + celsius2fahrenheit(20))   # 118.0
We can have functions with more operations in their body before returning:
def product(numbers):
	res = 1
	for n in numbers:
		res *= n
	return res

print(product([4, 5, 6]))   # 120
print(product([-1, 0, 5]))  # 0


You are asked to write a function called vote, which would return the element which appears the most frequent among the 3 numbers passed to it. If all of them are different, the function should return the first one.
The input contains 3 numbers.
The program should print a single number - the most frequent one returned by the function vote.
0 1 0
1 2 3


Time limit: 1 seconds

Memory limit: 512 MB

Output limit: 1 MB

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