Java // Convert array to HashSet in Javaimportjava.io.*;importjava.util.Iterator;// Importing Set librariesimportjava.util.Set;importjava.util.HashSet;classGFG{// Function to convert array to setstaticSet<Integer>convert(int[] array){// Hash Set InitialisationSet<Integer> Set =newHashSet<>...
Then, we can say thatdp(i)=1+∑>aicnt[j]dp(i)=1c[(dp(i)and after computing it, we updatecnt[]cnt[]-cnt[a[i]] += dp[i]. Well, that solution is still quadratic, but we can optimize it with a data structure. Take a look at the operations that we do over thecnt[]cnt[...
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