Python: Read the mass data and find the number of islands

Python Basic - 1: Exercise-57 with Solution

There are 10 vertical and horizontal squares on a plane. Each square is painted blue and green. Blue represents the sea, and green represents the land. When two green squares are in contact with the top and bottom, or right and left, they are said to be ground. The area created by only one green square is called "island". For example, there are five islands in the figure below.
Write a Python program to read the mass data and find the number of islands.

Input:
A single data set is represented by 10 rows of 10 numbers representing green squares as 1 and blue squares as zeros.
1100000111
1000000111
0000000111
0010001000
0000011100
0000111110
0001111111
1000111110
1100011100
1110001000
Number of islands:
5

Pictorial Presentation:

Sample Solution:

Python Code:

c=0
def f(x,y,z):
    if 0<=y<10 and 0<=z<10 and x[z][y]=='1':
        x[z][y]='0'
        for dy,dz in [[-1,0],[1,0],[0,-1],[0,1]]:f(x,y+dy,z+dz)
print("Input 10 rows of 10 numbers representing green squares (island) as 1 and blue squares (sea) as zeros") 
while 1:
    try:
        if c:input()
    except:break
    x = [list(input()) for _ in [0]*10]
    c=1;b=0
    for i in range(10):
        for j in range(10):
            if x[j][i]=='1':
                b+=1;f(x,i,j)
    print("Number of islands:")     
    print(b)

Sample Output:

Input 10 rows of 10 numbers representing green squares (island) as 1 and blue squares (sea) as zeros
 1100000111
 1000000111
 0000000111
 0010001000
 0000011100
 0000111110
 0001111111
 1000111110
 1100011100
 1110001000
Number of islands:
5

Flowchart:

Python Code Editor:

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