Compilare: main.cpp: In function 'int main()': main.cpp:9:9: warning: unused variable 'n' [-Wunused-variable] 9 | int n, k, i, j; | ^ main.cpp:9:12: warning: unused variable 'k' [-Wunused-variable] 9 | int n, k, i, j; | ^ main.cpp:9:15: warning: unused variable 'i' [-Wunused-variable] 9 | int n, k, i, j; | ^ main.cpp:9:18: warning: unused variable 'j' [-Wunused-variable] 9 | int n, k, i, j; | ^