# include <iostream.h>
# include <string.h>
int main ()
{
    char a[2002][202];
    char b[10000][1000];
    char c[10000][1000];
    char d[10000][1000];
    char e[10000][1000];
    int n,i,j=0,k=0,m=0,h=0;
    cin>>n;
    for (i=0;i<2*n;i++)
        cin.getline (a[i],2002,'\n');
    for (i=0;i<2*n;i=i+2)
    {
        if (a[i+1][0]-'0'=='S'-'0')
        {
            strcpy(b[j],a[i]);
            j++;
        }
        else if (a[i+1][0]-'0'=='H'-'0')
        {
            strcpy(c[k],a[i]);
            k++;
        }
        else if (a[i+1][0]-'0'=='G'-'0')
        {
            strcpy(d[m],a[i]);
            m++;
        }
        else if (a[i+1][0]-'0'=='R'-'0')
        {
            strcpy(e[h],a[i]);
            h++;
        }
    }
    cout<<"Slytherin:"<<endl;;
    for (i=1;i<=j;i++)
        cout<<b[i]<<endl;
    cout<<'\n'<<"Hufflepuff:"<<endl;
    for (i=1;i<=k;i++)
        cout<<c[i]<<endl;
    cout<<'\n'<<"Gryffindor:"<<endl;
    for (i=1;i<=m;i++)
        cout<<d[i]<<endl;
    cout<<'\n'<<"Ravenclaw:"<<endl;
    for (i=1;i<=h;i++)
        cout<<e[i]<<endl;
    return 0;
}





Tell mi what to do,please, and sorry for my English.

your sorce is wronge it is crashing because of
char a[2002][202];
char b[10000][1000];
char c[10000][1000];
char d[10000][1000];
char e[10000][1000];
you got to change to:
char a[103][1002];
char b[102][1002];
char c[102][1002];
char d[102][1002];
char e[102][1002];
but on the first test the program output :
Hufflepuff:

Gryffindor:

Ravenclaw:

the wright answer is :
Slytherin:
Zlobeus Zlei
Um Bridge

Hufflepuff:
Mac Go Nagolo

Gryffindor:
Ivan Ivanov
Garry Potnyj
Herr Mionag-Ranger

Ravenclaw:
Tatiana Henrihovna Grotter