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i got runtime error by using this
that's because in test case 4 the number of rotations is much bigger than the number of elements of the array.
If you were really executing the rotations, it wouldn't cause any error, but would be very slow, causing errors in other cases (time out). If you use any algorythm that just subtacts the number of rotations from the size of the array, in fact you may try to access elements outside of the array. In case 4 we have an array with 515 elements which is rotated 100000 times. When I try to retrieve the 1st element, the algorythm will try to retriev the element with the index -9485(negative), giving an error of segmentation.