1002 487-3279

这道题的难度一般，主要的难点在于程序的执行效率，我是使用java语言进行编写的，开始的时候采用了之间使用字符串存储比较的方式，但是这种方式的效率不高，所以后来我采用了将字符串先转换成数值的方式，这种方式下的各个号码之间的比较效率是比较高的。下面是我的java代码：

import java.io.*;
import java.util.*;
import java.math.*;
import java.net.InterfaceAddress;

public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
int map[] = {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};
sc.nextLine();
String str;
int result[] = new int[100001];
for(int i=0;i<num;i++){
String string = "";
int det = 0;
str = sc.nextLine();
str = str.replaceAll("-","");
for(int t=0;t<str.length();t++){
char ca = str.charAt(t);
int del = ca - 'A';
if(del < 0)
string += ca;
else
string += map[del];
}
result[i] = Integer.parseInt(string);
}
Arrays.sort(result);
int i1 = 100001 - num;
int dep = 0;
while(i1 < 100000){
int i2 = i1 + 1;
int time = 1;
while(i2 < 100001){
if(result[i1] == result[i2]){
time++;
if(i2 == 100000)
i1 = i2;
i2++;
}
else{
i1 = i2;
break;
}
}
if(time>1){
String number = String.valueOf(result[i1-1]);
for(;number.length()<7;){
number = "0"+number;
}
System.out.println(number.substring(0, 3)+"-"+number.substring(3)+" "+time);
dep++;
}
}
if(dep == 0)
System.out.println("No duplicates.");
}
}

原题题目如下：

Businesses like to have memorable telephone numbers. One way to make a telephone number memorable is to have it spell a memorable word or phrase. For example, you can call the University of Waterloo by dialing the memorable TUT-GLOP. Sometimes only part of the number is used to spell a word. When you get back to your hotel tonight you can order a pizza from Gino’s by dialing 310-GINO. Another way to make a telephone number memorable is to group the digits in a memorable way. You could order your pizza from Pizza Hut by calling their “three tens” number 3-10-10-10.

The standard form of a telephone number is seven decimal digits with a hyphen between the third and fourth digits (e.g. 888-1200). The keypad of a phone supplies the mapping of letters to numbers, as follows:

A, B, and C map to 2

D, E, and F map to 3

G, H, and I map to 4

J, K, and L map to 5

M, N, and O map to 6

P, R, and S map to 7

T, U, and V map to 8

W, X, and Y map to 9

There is no mapping for Q or Z. Hyphens are not dialed, and can be added and removed as necessary. The standard form of TUT-GLOP is 888-4567, the standard form of 310-GINO is 310-4466, and the standard form of 3-10-10-10 is 310-1010.

Two telephone numbers are equivalent if they have the same standard form. (They dial the same number.)

Your company is compiling a directory of telephone numbers from local businesses. As part of the quality control process you want to check that no two (or more) businesses in the directory have the same telephone number.

Input

The input will consist of one case. The first line of the input specifies the number of telephone numbers in the directory (up to 100,000) as a positive integer alone on the line. The remaining lines list the telephone numbers in the directory, with each number alone on a line. Each telephone number consists of a string composed of decimal digits, uppercase letters (excluding Q and Z) and hyphens. Exactly seven of the characters in the string will be digits or letters.

Output

Generate a line of output for each telephone number that appears more than once in any form. The line should give the telephone number in standard form, followed by a space, followed by the number of times the telephone number appears in the directory. Arrange the output lines by telephone number in ascending lexicographical order. If there are no duplicates in the input print the line:

No duplicates.

Sample Input

12

4873279

ITS-EASY

888-4567

3-10-10-10

888-GLOP

TUT-GLOP

967-11-11

310-GINO

F101010

888-1200

-4-8-7-3-2-7-9-

487-3279

Sample Output

310-1010 2

487-3279 4

888-4567 3