1031 Hello World for U (20 分)

#include
#include
#include
using namespace std;

int main()
{
    string s;
    cin>>s;
    int n1,n2,n3,n;
    n=s.length()+2;
    if(n%3==0)
        n2=n/3;
    else if(n%3==1)
        n2=n/3+1;
    else
        n2=n/3+2;
    if(n2<3)
        n2=3;
    n1=(n-n2)/2;
    n3=(n-n2)/2;
    vector row;
    vector line;
    for(int i=0;i