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hdu 1020 Encoding

时间:2016-09-16 00:06:24      阅读:259      评论:0      收藏:0      [点我收藏+]

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Encoding

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 40214    Accepted Submission(s): 17846


Problem Description
Given a string containing only ‘A‘ - ‘Z‘, we could encode it using the following method: 

1. Each sub-string containing k same characters should be encoded to "kX" where "X" is the only character in this sub-string.

2. If the length of the sub-string is 1, ‘1‘ should be ignored.
 

 

Input
The first line contains an integer N (1 <= N <= 100) which indicates the number of test cases. The next N lines contain N strings. Each string consists of only ‘A‘ - ‘Z‘ and the length is less than 10000.
 

 

Output
For each test case, output the encoded string in a line.
 

 

Sample Input
2
ABC
ABBCCC
 

 

Sample Output
ABC
A2B3C

 分析:有两种比较方式。第一种是s[i]与s[i+1]比较,当与s[i+1]不同时,则按要求输出s[i],这里如果是定义string s,

最后s[s.length() - 1]和s[s.length()]比较会报错(用的是VS2010),所以我定义成char s[10001],最后s[strlen[s] - 1]和s[strlen[s]] = ‘\0‘比较没有报错。

 1 #include <iostream>
 2 #include <cstring>
 3 using namespace std;
 4 int main(){
 5     int n;
 6     char s[10001];
 7     cin >> n;
 8     while(n--){
 9         cin >> s;
10         int num = 1;
11         int len = strlen(s);
12         for(int i = 0; i < len; i++){
13             if(s[i] == s[i+1])
14                 num++;
15             else {
16                 if(num == 1){
17                     cout << s[i];
18                 } else {
19                     cout << num << s[i];
20                     num = 1;
21                 }
22             }
23         }
24         cout << endl;
25     }
26     return 0;
27 }

第二种比较方法则是从下标1开始,s[i]和s[i-1]比较。当s[i] != s[i-1],则按要求输出s[i-1]。注意:不管s[s.length()-1]和s[s.length()-2]相不相等,都不会输出最后一个相同的字符字串。

 1 #include <iostream>
 2 #include <string>
 3 using namespace std;
 4 int main(){
 5     int n;
 6     string s;
 7     cin >> n;
 8     while(n--){
 9         cin >> s;
10         int num = 1;
11         int len = s.length();
12         for(int i = 1; i < len; i++){
13             if(s[i - 1] == s[i]){
14                 num++;
15             } else {
16                 if(num != 1){
17                     cout << num << s[i - 1];
18                     num = 1;
19                 }
20                 else {
21                     cout << s[i - 1];
22                 }
23             }
24         }
25         if(num != 1)
26             cout <<  num << s[len - 1];
27         else
28             cout << s[len - 1];
29         cout << endl;
30     }
31     return 0;
32 }

 

hdu 1020 Encoding

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原文地址:http://www.cnblogs.com/qinduanyinghua/p/5875609.html

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