Array Practice Test

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1.Count the number of pairs in integer array whose sum equals given sum (all elements are unique). 

n = int(input())

s = int(input())

l = input()

l=l.split(" ")

su = 0

for i in range(len(l)-1):

    for j in range(i+1,len(l)):

        if(int(l[i])+int(l[j])==n):

            su=su+1

print(su)

        

2.Write a program to get an integer array find the second largest element (where array has only distinct elements)

n=int(input())

l=input()

l=l.split(" ")

n=[]

for i in l:

    n.append(int(i))

n=sorted(n)

print(n[len(n)-2])