Problem 51630. Highest building

minnolina

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Input: Sketch of the outline of the buildings in a matrix.
Output: The column number of the highest building and height of it. In two or more building are the  highest, you need to choose the first one.  
Example: 
Let us consider buildings described by the matrix
M=[0 0 1 0;
   1 0 1 1;
   1 1 1 1;
   1 1 1 1]
The height of the first building (1st column) is 3, 
the height of the second building (2nd column) is 2,
the height of the third building is 4,
the height of the last building is 3.
The correct answer to highest_building(M) is [3, 4] (the building n°3 is the highest with height = 4).