Compilare: main.cpp: In function 'void BFS(int, int)': main.cpp:52:34: warning: NULL used in arithmetic [-Wpointer-arith] 52 | if (d[{x, x + y}] == NULL || d[{x, x + y}] > d[{x, y}] + 1) | ^~~~ main.cpp:58:34: warning: NULL used in arithmetic [-Wpointer-arith] 58 | if (d[{x + y, y}] == NULL || d[{x + y, y}] > d[{x, y}] + 1) | ^~~~ main.cpp: In function 'int main()': main.cpp:70:9: warning: unused variable 'i' [-Wunused-variable] 70 | int i, j; | ^ main.cpp:70:12: warning: unused variable 'j' [-Wunused-variable] 70 | int i, j; | ^