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Q02.java
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Q02.java
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public class Q02 {
public static void main (String[] args) {
final int DIGIT = 6;
final int START = (int)Math.pow(10, DIGIT - 1);
final int END = (int)Math.pow(10, DIGIT);
final int LIM = (int)Math.pow(2, DIGIT - 1);
for (int i = START; i < END; i++) {
String si = i + "";
for (int j = 1; j < LIM; j++) {
char[] ci = (i + "").toCharArray();
String stmt = ci[0] + "";
for (int k = 0; k < DIGIT - 1; k++) {
int s = 1 << k;
stmt += (j & s) == s ? "*" : "";
stmt += ci[k+1] + "";
}
String[] nums = stmt.split("\\*");
int sum = 1;
for (String n : nums) {
sum *= Integer.parseInt(n);
}
StringBuilder sb = new StringBuilder(sum + "");
if (si.equals(sb.reverse().toString())) {
System.out.println(i + ":" + stmt + "=" + sum);
break;
}
}
}
}
}