题解 | Hello World for U

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

int main() {
    string s1;
    cin>>s1;
    int len = s1.size();
    int high = len/3;//高
    int lenth = len - high*2;//长
    if(lenth==high){//不能相等
        high-=1;
        lenth+=2;
    }
    for(int i=0,j=len-1;i<high;i++,j--)
    {
        cout<<s1[i];
        for(int k=1;k<=lenth-2;k++)
        {
            cout<<" ";
        }
        cout<<s1[j]<<endl;
    }
    for(int i=high;i<high+lenth;i++)
    {
        cout<<s1[i];
    }
}
// 64 位输出请用 printf("%lld")