#include <array>
using MyArr = std::array<std::array<int,2>,2>;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
   MyArr arr = {{{1,2},{3,4}}};
   myf(arr);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}

void myf(MyArr a)
{
  Serial.println(a[1][1]);

}