/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
public class Main {
 
    // Function to count the number of digits in an integer
    public static int digit_count(int num) {
        return Integer.toString(num).length();
    }
 
    public static void main(String[] args) {
        int n = 3;
        int[] b = {0, 3, 14, 15}; // Given input, using 0 to keep 1-based index
 
        long sum = 0;
        long ans = 0;
 
        for (int j = 1; j <= n; ++j) {
            int y = digit_count(b[j]);
            long vl = (j - 1) * b[j] + (long)Math.pow(10, y) * sum;
            ans += vl;
            sum += b[j]; // Update sum with the current b[j]
        }
 
        System.out.println("Sum: " + ans);
    }
}
 

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