R=range;A=lambda f:''.join([str(sum([j for j in R(1,i)if i/j%1==0]))for i in R(1,f+1)])[f-1]
exec("print(A(int(input())));"*4)
Uj1yYW5nZTtBPWxhbWJkYSBmOicnLmpvaW4oW3N0cihzdW0oW2ogZm9yIGogaW4gUigxLGkpaWYgaS9qJTE9PTBdKSlmb3IgaSBpbiBSKDEsZisxKV0pW2YtMV0KZXhlYygicHJpbnQoQShpbnQoaW5wdXQoKSkpKTsiKjQp