In 225165101,the length of array a and b is smaller than 2500.However,it doesn't get RE,but get MLE.Why? Problem: 1882E1 - Две перестановки (простая версия)
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In 225165101,the length of array a and b is smaller than 2500.However,it doesn't get RE,but get MLE.Why? Problem: 1882E1 - Две перестановки (простая версия)
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You have:
For $$$i > 2002$$$, there's some garbage at
b[i]
andb[t] = b[b[i]]
, sob[i] != i
will almost certainly be true.So, the while loop runs indefinitely, and
swa()
appends toq
$$$3$$$ times, which leads to MLE.