Create rotateMatrix180Deg.py

Author: Amogh Singhal

rotateMatrix180Deg.py

@@ -0,0 +1,47 @@
+def rotateMatrixby90(ipMat, size):
+  opMat = [[0 for i in range(size)] for j in range(size)]
+
+  for i in range(size):
+    for j in range(size):
+      opMat[j][i] = ipMat[i][j]
+  
+  return opMat
+
+def reverseMatrix(ipMat, size):
+  opMat = [[0 for i in range(size)] for j in range(size)]
+  for i in range(size):
+    for j in range(size):
+      opMat[abs(i-(size-1))][j] = ipMat[i][j]
+  
+  return opMat
+
+def rotateMatrixby180(ipMat, size):
+  mat_1 = rotateMatrixby90(ipMat, size)
+  mat_2 = reverseMatrix(mat_1, len(mat_1))
+  mat_3 = rotateMatrixby90(mat_2, len(mat_2))
+  mat_4 = reverseMatrix(mat_3, len(mat_3))
+
+  return mat_4
+
+def printMatrix(ipMat, size):
+  for i in range(size):
+    for j in range(size):
+      print(ipMat[i][j], end=" ")
+    print('\n')
+
+matA = [[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]]
+print("Original-Matrix" + '\n')
+printMatrix(matA, len(matA))
+
+print("Rotated-Matrix" + '\n')
+rotatedMat = rotateMatrixby90(matA, len(matA))
+printMatrix(rotatedMat, len(rotatedMat))
+
+matB = [[1, 5, 9, 13], [2, 6, 10, 14], [3, 7, 11, 15], [4, 8, 12, 16]]
+reverseMat = reverseMatrix(matB, len(matB))
+print("Reverse-Matrix" + '\n')
+printMatrix(reverseMat, len(reverseMat))
+
+print("Rotated-180-Matrix" + '\n')
+rotatedMat180 = rotateMatrixby180(matA, len(matA))
+printMatrix(rotatedMat180, len(rotatedMat180))