The students of Saebyeol's school are going to have a wrestling match with each other once. How many students participated in the wrestling match if they had played 91 times?
91 2 [OP_MUL] 1/2 [OP_POW] 1 [OP_CEIL]
var_a = 91
var_b = 2
var_c = var_a * var_b
var_d = 0.5
var_e = var_c ** var_d
var_f = 1
var_g=int(((var_e+9*10**(var_f-2))//(10**(var_f-1)))*10**(var_f-1))

print(int(var_g))