Editorial - ISQ

editorial
1

Problem link : Interesting Sequences
Difficulty : Easy
Setter : Harshit Garg

Code :

from collections import Counter
n = int(input())
l = list(map(int,input().split()))
c = Counter(l)
f = 0
for i in c.keys():
    if c[i]>=i:
        f+=c[i]-i
    else:
        f+=c[i]
print(f)