Compilare: main.cpp: In function 'int main()': main.cpp:21:30: warning: unused variable 'a' [-Wunused-variable] 21 | int n, i, k = 0, nr = 0, a, b; | ^ main.cpp:21:33: warning: unused variable 'b' [-Wunused-variable] 21 | int n, i, k = 0, nr = 0, a, b; | ^