Submission #1608590

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Source Code Expand

from collections import Counter
N,A,B = map(int,input().split())
src = list(map(int,input().split()))
src.sort(reverse=True)

ave = sum(src[:A]) / A
print(ave)

counter = Counter(src)
cnt = counter[src[0]]

ncr = [[1]]
for n in range(1,N+1):
    ncr.append([1])
    for r in range(1,n):
        ncr[n].append(ncr[n-1][r-1] + ncr[n-1][r])
    ncr[n].append(1)

if cnt < A:
    last = src[A-1]
    n = counter[last]
    r = src[:A].count(last)
    print(ncr[n][r])
elif cnt == A:
    print(1)
else:
    ans = 0
    for r in range(A, min(B,cnt)+1):
        ans += ncr[cnt][r]
    print(ans)

Submission Info

Judge Result