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import std.stdio:writeln,write;
import std.algorithm:sort;
int product(int n)
{
int prod = 1;
while(n)
{
prod *= n % 10;
n /= 10;
}
return prod;
}
int helper(int n)
{
int sum = 0;
while(n >= 10)
{
sum++;
n = product(n);
}
return sum;
}
bool compare(int a, int b)
{
int ha = helper(a);
int hb = helper(b);
return ha == hb ? a < b : ha < hb;
}
void persistence_sort(ref int[] arr)
{
arr.sort!(compare);
}
void main()
{
int[] arr1 = [15,99,1,34];
int[] arr2 = [50,25,33,22];
persistence_sort(arr1);
persistence_sort(arr2);
writeln(arr1);
writeln(arr2);
}
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