scoreboard players set two func.temp 2

$data modify storage func:temp half.result set from storage func:temp $(list)

execute store result score length func.temp run data get storage func:temp half.result

scoreboard players operation half func.temp = length func.temp
scoreboard players operation half func.temp /= two func.temp

scoreboard players operation odd func.temp = length func.temp
scoreboard players operation odd func.temp %= two func.temp

scoreboard players operation half func.temp += odd func.temp

function func:half/f1