代码练习系列：问题 B Hello World for U

题目描述

Given any string of N (>=5) characters, you are asked to form the characters into the shape of U. For example, “helloworld” can be printed as:

h d

e l

l r

lowo

That is, the characters must be printed in the original order, starting top-down from the left vertical line with n1 characters, then left to right along the bottom line with n2 characters, and finally bottom-up along the vertical line with n3 characters. And more, we would like U to be as squared as possible – that is, it must be satisfied that n1 = n3 = max { k| k <= n2 for all 3 <= n2 <= N } with n1 + n2 + n3 - 2 = N.

输入

Each input file contains one test case. Each case contains one string with no less than 5 and no more than 80 characters in a line. The string contains no white space.

输出

For each test case, print the input string in the shape of U as specified in the description.

样例输入

helloworld!

样例输出

h !

e d

l l

lowor

提示

#include <stdio.h>
#include <string.h>

int main()
{
char s[80];
gets(s);
int num = strlen(s);
int n1,n2,mid;
n1 = n2 = (num + 2) / 3;
mid = num - 2 * n1;

for(int i = 0;i < n1;i++){
printf("%c",s[i]);
if(i == n1 - 1){
for(int k = 0;k < mid;k++){
printf("%c",s[n1 + k]);
}
}else{
for(int j = 0;j < mid;j++){
printf(" ");
}
}
printf("%c\n",s[num - 1 - i]);
}
return 0;
}