Problem:
Print Test Cases

In the online judge system, a judge file may include multiple datasets to check whether the submitted program outputs a correct answer for each test case. This task is to practice solving a problem with multiple datasets.

Write a program which reads an integer x and print it as is. Note that multiple datasets are given for this problem.

Input

The input consists of multiple datasets. Each dataset consists of an integer x in a line.

The input ends with an integer 0. You program should not process (print) for this terminal symbol.

Output

For each dataset, print x in the following format:

Case i: x

where i is the case number which starts with 1. Put a single space between "Case" and i. Also, put a single space between ':' and x.

Constraints

1 ≤ x ≤ 10000

The number of datasets ≤ 10000

Sample Input

3
5
11
7
8
19
0

Sample Output

Case 1: 3
Case 2: 5
Case 3: 11
Case 4: 7
Case 5: 8
Case 6: 19

Solution in Rust (judge verdict: Accepted)

#![allow(unused)]
use std::io::{self, Read};

fn get_stdin() -> String {
    let mut buf = String::new();
    let mut stdin = io::stdin();
    stdin.read_to_string(&mut buf);
    return buf
}

fn to_nums(ss: &str) -> Vec<i32> {
    ss.split_whitespace()
        .map(|x| x.parse::<i32>().unwrap())
        .collect()
}

fn main() {
    let input = get_stdin();
    let v = to_nums(&input);
    for (i, n) in v.iter().enumerate() {
        if n != &0 {
            println!("Case {}: {}", i + 1, n)
        } else {
            break;
        }
    }
}