Help me in solving CHEFDETE problem

help
,
1

My issue

how can i get indices in python

My code

# cook your dish here
n=int(input())
r=list(map(int,input().split()))
for x in r:

Problem Link: CHEFDETE Problem - CodeChef

2

@nageswarijampa
Plzz refer the following python code for better understanding of the implementation .

# cook your dish here
n=int(input())
r=list(map(int,input().split(" ")))
# criminal_list=list(range(1,n+1)
r=set(r)
result=""
for ele in range(1,n+1):
    if ele not in r:
        result+=f'{ele} '
print(result)