while True: try: n = int(input()) xlist = list(map(int, input().split())) ncount = 0 p = [] for i in xlist: if i < 0: ncount += 1 elif i > 0: p.append(i) if len(p) == 0: aver = 0 else: aver = sum(p)/len(p) print(ncount,'%.1f' % aver) except: break