Problem
The Latin alphabet contains 26 characters and telephones only have ten digits on the keypad. We would like to make it easier to write a message to your friend using a sequence of keypresses to indicate
the desired characters. The letters are mapped onto the digits as shown below. To insert the character B for instance, the program would press22.
In order to insert two characters in sequence from the same key, the user must pause before pressing the key a second time. The space character ‘ ‘ should be printed to indicate a
pause. For example, 2 2 indicates AA whereas 22 indicates B.
Input
The first line of input gives the number of cases, N. N test cases follow. Each case is a line of text formatted as
desired_message
Each message will consist of only lowercase characters a-z and space characters ‘. Pressing zero emits a space.
‘
Output
For each test case, output one line containing "Case #x: " followed by the message translated into the sequence of keypresses.
Limits
1 ≤ N ≤ 100.
Small dataset
1 ≤ length of message in characters ≤ 15.
Large dataset
1 ≤ length of message in characters ≤ 1000.
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
int n_case;
ifstream ifile("C-large-practice.in");
ofstream ofile("result_c2.txt");
ifile >> n_case;
int reference[26] = {2,2,2,3,3,3,4,4,4,5,5,5,6,6,6,7,7,7,7,8,8,8,9,9,9,9};
int replace[26] = {2,22,222,3,33,333,4,44,444,5,55,555,6,66,666,7,77,777,7777,8,88,888,9,99,999,9999};
for(int i = 0; i <= n_case; i++)
{
char line[1002];
ifile.getline(line, 1002);
string words(line);
if(i == 0)
continue;
ofile << "Case #" << i << ": ";
for(int i = 0; i < words.length(); i++)
{
if(words[i] == ' ')
{
if(i - 1 >= 0 && words[i - 1] == ' ')
ofile << ' ' << 0;
else ofile << 0;
}
else
{
if(i - 1 >= 0 && reference[words[i] - 'a'] == reference[words[i - 1] - 'a'])
ofile << ' ' << replace[words[i] - 'a'];
else ofile << replace[words[i] - 'a'];
}
}
ofile << endl;
}
return 0;
}