zoukankan      html  css  js  c++  java
  • 杭电1200--To and Fro

     

    To and Fro

     

    Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
    Total Submission(s): 5478    Accepted Submission(s): 3788


    Problem Description
    Mo and Larry have devised a way of encrypting messages. They first decide secretly on the number of columns and write the message (letters only) down the columns, padding with extra random letters so as to make a rectangular array of letters. For example, if the message is “There’s no place like home on a snowy night” and there are five columns, Mo would write down

    t o i o y
    h p k n n
    e l e a i
    r a h s g
    e c o n h
    s e m o t
    n l e w x


    Note that Mo includes only letters and writes them all in lower case. In this example, Mo used the character ‘x’ to pad the message out to make a rectangle, although he could have used any letter.

    Mo then sends the message to Larry by writing the letters in each row, alternating left-to-right and right-to-left. So, the above would be encrypted as

    toioynnkpheleaigshareconhtomesnlewx

    Your job is to recover for Larry the original message (along with any extra padding letters) from the encrypted one.
     

     

    Input
    There will be multiple input sets. Input for each set will consist of two lines. The first line will contain an integer in the range 2. . . 20 indicating the number of columns used. The next line is a string of up to 200 lower case letters. The last input set is followed by a line containing a single 0, indicating end of input.
     

     

    Output
    Each input set should generate one line of output, giving the original plaintext message, with no spaces.
     

     

    Sample Input
    5
    toioynnkpheleaigshareconhtomesnlewx
    3
    ttyohhieneesiaabss
    0
     

     

    Sample Output
    theresnoplacelikehomeonasnowynightx
    thisistheeasyoneab
     

     

    Source
     

     

    Recommend
    Ignatius.L   |   We have carefully selected several similar problems for you:  1196 1073 1161 1039 1020 
    //AC:
     1 #include <stdio.h>
     2 #include <string.h>
     3 char str[210][210] , ch[210] ;
     4 int main()
     5 {
     6     int n ;
     7     while(~scanf("%d", &n), n)
     8     {
     9         scanf("%s", ch) ;
    10         int len = strlen (ch) ;
    11         int l = len / n ;   //行数 ; 
    12         
    13         if(len % n != 0)    //取余不为0, 行数+1 ; 
    14         l += 1 ;
    15         
    16         int k, i, j ;
    17         k = 0 ;
    18         for(i=0; i < l; i++)
    19         {
    20             if(i%2 == 0)   //将字符串旋转放入二维数组中 ; 
    21             {
    22                 for(j=0; j<n; j++)
    23                 {
    24                     str[i][j] = ch[k] ;
    25                     k++ ;    
    26                 }    
    27             }
    28             else
    29             {
    30                 for(j=n-1; j>=0; j--)
    31                 {
    32                     str[i][j] = ch[k] ;
    33                     k++ ;    
    34                 }    
    35             }    
    36             /*if(k == len)
    37             break ; */
    38         }
    39         for(j=0; j<n; j++)   //列不变, 行改变输出 ; 
    40         {
    41             for(i=0; i<l; i++)
    42             printf("%c",str[i][j]) ;
    43         }
    44         printf("
    ") ;
    45     }
    46     return 0 ;
    47 }
  • 相关阅读:
    JS-instanceof 与typeof
    JS-面向对象相关
    spark job源代码物理执行图实战
    堆(heap)和栈(stack)的区别
    sql developer怎样调试Pipelined
    oracle dbms_output 在java中输出
    sed 用法笔记
    oracle 怎样建自增长字段
    python学习笔记--split与join用法
    如何开启php报错
  • 原文地址:https://www.cnblogs.com/soTired/p/4665559.html
Copyright © 2011-2022 走看看