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Breadth First Search
Breadth First Search
Coloring Pixels
Swipe to start coding
Imagine you have an image a of size m*n, and there are some areas painted black or white (marked 1 or 0 in array). When you touch the pixel a[i][j], you color it with number 2, and if you colored some pixel, youβll also color all 4-directionally connected pixels of the same color.
Example 1
Input: m=4, n=6, x=1, y=2
1 1 1 0 0 0
0 1 1 0 0 0
1 1 0 0 1 1
0 0 1 1 0 0
Output:
2 2 2 0 0 0
0 2 2 0 0 0
2 2 0 0 1 1
0 0 1 1 0 0
Example 2
Input: m=4, n=6, x=2, y=5
1 1 1 0 0 0
0 1 1 0 0 0
1 1 0 0 1 1
0 0 1 1 0 0
Output:
1 1 1 0 0 0
0 1 1 0 0 0
1 1 0 0 2 2
0 0 1 1 0 0
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Coloring Pixels
Swipe to start coding
Imagine you have an image a of size m*n, and there are some areas painted black or white (marked 1 or 0 in array). When you touch the pixel a[i][j], you color it with number 2, and if you colored some pixel, youβll also color all 4-directionally connected pixels of the same color.
Example 1
Input: m=4, n=6, x=1, y=2
1 1 1 0 0 0
0 1 1 0 0 0
1 1 0 0 1 1
0 0 1 1 0 0
Output:
2 2 2 0 0 0
0 2 2 0 0 0
2 2 0 0 1 1
0 0 1 1 0 0
Example 2
Input: m=4, n=6, x=2, y=5
1 1 1 0 0 0
0 1 1 0 0 0
1 1 0 0 1 1
0 0 1 1 0 0
Output:
1 1 1 0 0 0
0 1 1 0 0 0
1 1 0 0 2 2
0 0 1 1 0 0
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Switch to desktop for real-world practiceContinue from where you are using one of the options below