Exercise 3: Check Neighbors

Your Task

Write a function count_neighbors(grid, row, col, value) that returns how many of the 4 adjacent cells (up, down, left, right) equal value.

Be careful at the edges — don't go out of bounds!

Examples

grid = [
    [1, 2, 1],
    [2, 5, 2],
    [1, 2, 1]
]

print(count_neighbors(grid, 1, 1, 2))  # 4 — all 4 neighbors of center are 2
print(count_neighbors(grid, 0, 0, 2))  # 1 — top-left corner, only right neighbor is 2
print(count_neighbors(grid, 1, 1, 1))  # 0 — center has no neighbors equal to 1

Hints