题目1464：Hello World for U

#include <stdio.h>
#include<string.h>
const int MAX=100;
  
int main()
{
    int n1,n2,n3,i,j;
    char str[MAX];
 
    while(scanf("%s",str)!=EOF){
        int len=strlen(str);
        if(len%3!=0){
            n1=len/3+1;
            n3=len/3+1;
            n2=len+2-n1*2;
        }
        else{
            n1=len/3;
            n3=len/3;
            n2=len+2-n1-n3;
        }
        for(i=0;i<n1-1;i++){
            printf("%c",str[i]);
            for(j=0;j<n2-2;j++)
                printf(" ");
            printf("%c\n",str[len-1-i]);
        }
        for(i=n1-1;i<n1+n2-1;i++)
            printf("%c",str[i]);
        printf("\n");
    }   
    return 0;
}