21 lines
402 B
Python
21 lines
402 B
Python
from sys import stdin
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n,k=map(int,stdin.readline().rstrip().split())
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arr=[False for i in range(n+1)]
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cnt=[0,0,False]
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for i in range(2,n+1):
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for j in range(i,n+1,i):
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if arr[j]==True:
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continue
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arr[j]=True
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cnt[0]+=1
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if cnt[0]==k:
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cnt[1]=j
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cnt[2]=True
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break
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if cnt[2]==True:
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break
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print(cnt[1]) |