Daily AtCoder # 36 in Python

Introduction

Last time I didn't move my head today, so I only solved one question.

#36 ARC086-A

** Thoughts ** TLE when counting for all elements. Since count cannot be used, after sorting, the number of elements is counted by comparing adjacent elements. If the element type $ set (a) $ is greater than $ k $, add to ans in ascending order from $ set (a) $.

n, k = map(int,input().split())
a = list(map(int,input().split()))

a.sort()
count = []
c = 1
for i in range(n-1):
    if a[i] != a[i+1]:
        count.append(c)
        c = 1
    else:
        c += 1
    if i == n - 2:
        count.append(c)

l = len(count)
#print(a)
#print(count)
c = 0
if l <= k:
    print(0)
else:
    count.sort()
    for i in range(l):
        l -= 1
        c += count[i]
        if l <= k:
            print(c)
            quit()

Summary

count is slow. (Probably $ O (N) $). see you.

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