Compilare: main.cpp: In function 'int check(int)': main.cpp:35:12: warning: unused variable 'j' [-Wunused-variable] 35 | int i, j; | ^ main.cpp: In function 'int main()': main.cpp:77:9: warning: unused variable 'i' [-Wunused-variable] 77 | int i, t, length, j, k; | ^ main.cpp:77:23: warning: unused variable 'j' [-Wunused-variable] 77 | int i, t, length, j, k; | ^ main.cpp:77:26: warning: unused variable 'k' [-Wunused-variable] 77 | int i, t, length, j, k; | ^