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everyone welcome back and lets write some more neat code today were given an n by n matrix so this time its a square matrix for sure representing some image and we want to rotate that image by 90 degrees clockwise and we are required to do this in place so we cannot allocate more memory we cant just make a copy of the matrix and rotate it like that so the challenge here is definitely doing it in place you can see that they had a original matrix like this what they did is they took the one and put it over here so 90 degrees basically what they did is took this entire first row and moved it into the rightmost column right and so they did that by moving this over here moving this 2 over here moving the 3 over here and so the problem is when youre moving this one over here you have to save the three temporarily right so you just save the three or once you move this one over here you can take the three save it and move it over here and we know that this entire right column is going to