Cinema Seat Free-Count

EASY2D Arrays6 marks

A cinema screen is stored in a 3×4 2D array. Each cell is F (free) or B (booked). Read the 12 seat codes row by row and output how many seats are still free.

Input: 12 strings, one per seat, in row-major order. Output: Free seats: <count>.

Example:

Input:  F
        F
        B
        F
        B
        F
        F
        B
        F
        F
        F
        B
Output: Free seats: 8

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Sample Test Cases

Test 1: Mixed free and booked

Inputs: F, F, B, F, B, F, F, B, F, F, F, B

Expected: Free seats: 8

Test 2: Full house

Inputs: B, B, B, B, B, B, B, B, B, B, B, B

Expected: Free seats: 0