n=int(input())
a=input().split()
a=list(map(int,a))
da=max(a)
xiao=min(a)
print(da-xiao)
for i in range(n):
    if(a[i]==xiao):
        print(i+1,end=" ")
/**************************************************************
	Problem: 1818
	User: admin
	Language: Python
	Result: Accepted
	Time:100 ms
	Memory:34480 kb
****************************************************************/