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n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))n=int(input()) s=0 for i in range(1, n+1, 1): x = int(input()) s = s+x print('%.2f'%(s/n))

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