Logic Building
# Take arrays
n1 = int(input("Enter size of first array: "))
arr1 = []
for i in range(n1):
arr1.append(int(input(f"Array1 element {i+1}: ")))
n2 = int(input("Enter size of second array: "))
arr2 = []
for i in range(n2):
arr2.append(int(input(f"Array2 element {i+1}: ")))
# Count common
common_set = set(arr1) & set(arr2)
count = len(common_set)
print(f"Number of common elements: {count}")Output
Enter size of first array: 4 Array1 element 1: 1 Array1 element 2: 2 Array1 element 3: 3 Array1 element 4: 2 Enter size of second array: 3 Array2 element 1: 2 Array2 element 2: 3 Array2 element 3: 4 Number of common elements: 2
Use set intersection to find common elements.
Key Concepts:
- Convert to sets
- Use & operator for intersection
- Count unique common elements