Käännöt

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Scanner;
 
public class Kaannot {
 
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		String input = s.nextLine();
		char[] digits = input.toCharArray();
		s.close();
		
		BigInteger sum = new BigInteger(new String(digits)).multiply(new BigInteger(digits.length + ""));
				
		StringBuilder sb = new StringBuilder();
		BigInteger modulus = new BigInteger("1000000007");
		
		for (int i = 0; i < digits.length; i++) {
			for (int j = i+1; j < digits.length; j++) {
				sb.append(Arrays.copyOfRange(digits, i, j+1)).reverse();
				sb.insert(0, Arrays.copyOfRange(digits, 0, i));
				sb.append(Arrays.copyOfRange(digits, j+1, digits.length));
				sum = sum.add(new BigInteger(sb.toString()).mod(modulus));
				sb.setLength(0);
			}
		}
		System.out.println(sum.mod(modulus));
	}
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED