PAT甲级 1031

1031. Hello World for U (20)

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 n ₁ characters, then left to right along the bottom line with n ₂ characters, and finally bottom-up along the vertical line with n ₃ characters. And more, we would like U to be as squared as possible – that is, it must be satisfied that n ₁ = n ₃ = max { k| k <= n ₂ for all 3 <= n ₂ <= N } with n ₁ + n ₂ + n ₃ - 2 = N.

Input Specification:

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.

Output Specification:

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

Sample Input:

helloworld!

Sample Output:

h   !
e   d
l   l
lowor

---

1. 考点

   1. 模拟。

2. 题解

   1. 按照题中所给的条件就可以了。

#include <iostream>
#include <stdio.h>
using namespace std;
char str[MAXSIZE];
int main(){
    freopen("./in","r",stdin);
    scanf("%s",str);
    int len=0;
    while(str[len]!='\0')len++;

    int i,j,k,temp;
    for(i=len;i>=1;i--){
        temp=len+2-2*i;
        if(i<=temp){
            break;
        }
    }
    for(j=0;j<i-1;j++){
        printf("%c",str[j]);
        for(k=0;k<temp-2;k++)printf(" ");
        printf("%c\n",str[len-1-j]);
    }
    for(k=0;k<temp;k++)printf("%c",str[k+i-1]);
    return 0;
}