1464.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：

There are multiple test cases.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!
ac.jobdu.com

样例输出：

h   !
e   d
l   l
lowor
a    m
c    o
.    c
jobdu.

#include<iostream>
using namespace std;

int main(){
    string s;
    while(cin>>s){
        int side,mid,len;
        len=s.size();
        side=(len+2)/3;
        mid=len-side*2;
        for(int i=0;i<side-1;i++){
            cout<<s[i];
            for(int j=0;j<mid;j++){
                cout<<" ";
            }
            cout<<s[len-1-i]<<endl;
        }
        for(int i=0;i<mid+2;i++){
            cout<<s[side-1+i];
        }
        cout<<endl;
    }
    return 0;
}