admin管理员组文章数量:1594228
Immediate Decodability
Immediate Decodability |
An encoding of a set of symbols is said to be immediately decodable if no code for one symbol is the prefix of a code for another symbol. We will assume for this problem that all codes are in binary, that no two codes within a set of codes are the same, that each code has at least one bit and no more than ten bits, and that each set has at least two codes and no more than eight.
Examples: Assume an alphabet that has symbols {A, B, C, D}
The following code is immediately decodable:
A:01 B:10 C:0010 D:0000
but this one is not:
A:01 B:10 C:010 D:0000
(Note that A is a prefix of C)
Input
Write a program that accepts as input a series of groups of records from a data file.Each record in a group contains a collection of zeroes and ones representing a binary code for a different symbol. Each group is followed by a single separator record containing a single 9; the separator records are not part of the group. Each group is independent of other groups; the codes in one group are not related to codes in any other group (that is, each group is to be processed independently).Output
For each group, your program should determine whether the codes in that groupare immediately decodable, and should print a single output line giving the group number and stating whether the group is, or is not, immediately decodable.
The Sample Input describes the examples above.
Sample Input
01 10 0010 0000 9 01 10 010 0000 9
Sample Output
Set 1 is immediately decodable Set 2 is not immediately decodable
#include<stdio.h>
#include<string.h>
char str[50][50];
int comp(int x, int y){
int n_x,n_y,n;
n_x = strlen(str[x]);
n_y = strlen(str[y]);
n = (n_x > n_y)?n_y:n_x;
for (int i = 0; i < n; i++){
if(str[x][i] != str[y][i])
return 1;
}
return 0;
}
int main()
{
// char str[50][50];
int k = 0,flag = 0,cas = 0;
while (gets(str[k])){
if (str[k][0] == '9'){
for (int i = 0; i < k; i++)
for (int j = i+1; j < k; j++){
if (comp(i, j) == 0)
flag = 1;
}
cas ++;
if (flag)
printf("Set %d is not immediately decodable\n",cas);
else
printf("Set %d is immediately decodable\n",cas);
k = 0;
flag = 0;
}
else
k++;
}
}
本文标签: uvaimmediately
版权声明:本文标题:uva 644 immediately 内容由热心网友自发贡献,该文观点仅代表作者本人, 转载请联系作者并注明出处:https://www.elefans.com/xitong/1725429323a1022716.html, 本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容,一经查实,本站将立刻删除。
发表评论