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DigitCounting.java
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executable file
·61 lines (57 loc) · 2.12 KB
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/**
* Trung is bored with his mathematics homeworks. He takes a piece of chalk and starts writing a sequence
* of consecutive integers starting with 1 to N (1 < N < 10000). After that, he counts the number of
* times each digit (0 to 9) appears in the sequence. For example, with N = 13, the sequence is:
* 12345678910111213
* In this sequence, 0 appears once, 1 appears 6 times, 2 appears 2 times, 3 appears 3 times, and each
* digit from 4 to 9 appears once. After playing for a while, Trung gets bored again. He now wants to
* write a program to do this for him. Your task is to help him with writing this program.
* Input
* The input file consists of several data sets. The first line of the input file contains the number of data
* sets which is a positive integer and is not bigger than 20. The following lines describe the data sets.
* For each test case, there is one single line containing the number N.
* Output
* For each test case, write sequentially in one line the number of digit 0, 1, . . . 9 separated by a space.
* Sample Input
* 2
* 3
* 13
* Sample Output
* 0 1 1 1 0 0 0 0 0 0
* 1 6 2 2 1 1 1 1 1 1
*/
//https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=3666
import static java.lang.Integer.parseInt;
import static java.lang.System.exit;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.StringTokenizer;
public class DigitCounting {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int numberOfTestCases = input.nextInt();
while (numberOfTestCases != 0) {
int[] numbers = new int[10];
int number = input.nextInt();
for (int i = number; i > 0; i--) {
int j = i;
while (j != 0) {
numbers[j % 10]++;
j = j / 10;
}
}
for (int i = 0; i < 10; i++) {
if (i != 0) {
System.out.print(" ");
}
System.out.print(numbers[i]);
}
System.out.println();
numberOfTestCases--;
}
}
}