/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
StringBuilder sb = new StringBuilder();
int repeat = 0;
for (char c : str.toCharArray()) {
repeat
= repeat
* 10 + Character.
getNumericValue(c
); } else {
while (repeat > 0) {
sb.append(c);
repeat--;
}
sb.append(c);
}
}
return sb.toString();
}
{
System.
out.
println(blowup
("a3tx23z")); }
}
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