Topcoder SRM 640 div2 500problem

It took about 1hour to solve this problem

In contest I failed to solve this one.

After days later I retried to solve this one

Finally I was able to solve this one.

My code is below

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package srm640; import java.util.Arrays; public class NumberGameAgain { public static void main(String[] args) { NumberGameAgain num = new NumberGameAgain(); // int k=40; // long table[] = {2l,4l,8l,16l,32141531l,2324577l,1099511627775l,2222222222l,33333333333l,4444444444l,2135l}; int k=3; long table[] = {2,4,6}; // int k=5; // long table[] = {2,3}; num.solve(k, table); } public long solve(int k, long[]table){ // 1차 필터링 Arrays.sort(table); for(int i=table.length -1; i>0; i--){ long val = table[i]; hello: while((val = val /2) > 1){ for(int p = i-1; p>= 0; p--){ if(table[p] == val){ table[i] = -1; break hello; } } } } long total = (long) Math.pow(2, k) -2; for(int i=0; i<table.length; i++){ long val = table[i]; for(int j=1; j<k+1; j++){ if(table[i] == -1) continue; //System.out.println("j : " + j + " Math.pow(2, j) : " + Math.pow(2, j)); if(Math.pow(2, j) > table[i]){ //System.out.println("minus : " +(Math.pow(2, k-(j-1)) -1)); total -= Math.pow(2, k-(j-1)) -1; break; } } } //System.out.println(total); // System.out.println(Arrays.toString(table)); return total; } }