题解 | #Hello World for U#

#include <iostream>
#include <cstring>
using namespace std;

int main(){
    while(1){
        string str;
        getline(cin,str);
        int n=str.length();
        if(n==0)
            return 0;
        int n1=(n+2)/3;
        int n2=n1+(n+2-3*n1);
        char u[n1][n2];
        for(int i=0;i<n1;i++)
            for(int j=0;j<n2;j++)
                if(j==0)
                    u[i][j]=str[i];
                else
                    if(i==n1-1)
                        u[i][j]=str[i+j];
                    else
                        if(j==n2-1)
                            u[i][j]=str[n-1-i];
                        else
                            u[i][j]=' ';
        
        for(int i=0;i<n1;i++){
            for(int j=0;j<n2;j++)
                cout<<u[i][j];
            cout<<endl;
        }
    }
}