Help on STACKS

Someone please help me I am getting NZEC error on the following binary search problem - https://www.codechef.com/problems/STACKS

        def bSearch(ind,val,l,r):
            ans = ind
            while r>=l:
                m = (r+l)//2
                if s[m]>val:
                    ans = m; r = m-1
                else:
                    l = m+1
            return ans
            
        for _ in range(int(input())):
            n = int(input())
            a = list(map(int,input().split()))
            s = []; size = 1
            s.append(a[0])
            for i in range(1,n):
                if a[i]>s[size-1]:
                    s.append(a[i]); size += 1
                else:
                    index = bSearch(i,a[i],0,size-1)
                    s[index] = a[i]
                    
            print(size,*s)

Finally I was able to identify what was the issue, then replaced following

with

Edit : Got AC now :innocent: