# the total should be returned not just the edge of a single island
# correct implementation is below

def findIslandPerimeter(matrix):
    rows = len(matrix)
    cols = len(matrix[0])
    visited = [[False for i in range(cols)] for j in range(rows)]
    total = 0 # added
    for i in range(rows):
        for j in range(cols):
            if (matrix[i][j] == 1 and not visited[i][j]):
                total += islandPerimeterDFS(matrix, visited, i, j) # updated

    return total # updated