Students are standing in a line. Yoongi is standing 7th from the left and 5th from the right. How many students are standing in line?
7 5 [OP_ADD] 1 [OP_SUB]
var_a = 7
var_b = 5
var_c = var_a + var_b
var_d = 1
var_e = var_c - var_d
print(int(var_e))