python find the runner-up score with same value code example

Example 1: runner up score hackerrank solution

from collections import Counter
if __name__ == '__main__':
    n = int(raw_input())
    arr = Counter(map(int, raw_input().split())).keys()
    arr.sort()
    print arr[-2]

Example 2: find the runner-up score

n = int(input())
arr = list(map(int, input().split()))
zes = max(arr)
i=0
while(i<n):
    if zes ==max(arr):
        arr.remove(max(arr))
    i+=1
print(max(arr))
#note: do not  use set() will not work for negative numbers
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