Compilare: main.cpp:3: warning: ignoring '#pragma gcc optimize' [-Wunknown-pragmas] 3 | #pragma gcc optimize ("O3") | main.cpp: In function 'int main()': main.cpp:15:15: warning: unused variable 'b' [-Wunused-variable] 15 | int n, a, b, poz=0, in=0; | ^ main.cpp:15:18: warning: unused variable 'poz' [-Wunused-variable] 15 | int n, a, b, poz=0, in=0; | ^~~ main.cpp:15:25: warning: unused variable 'in' [-Wunused-variable] 15 | int n, a, b, poz=0, in=0; | ^~