how to find runner up score in python

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

                                    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
# contact me : [email protected]

                                    if __name__ == '__main__':
    n = int(input())
    arr = map(int, input().split())
    arr = list(arr)
    x = max(arr)
    y = -9999999
    for i in range(0,n):
        if arr[i]<x and arr[i] > y:
            y = arr[i]
    
    print(y)