Compilare: main.cpp: In function 'int main()': main.cpp:12:31: warning: unused variable 'dr' [-Wunused-variable] int n, d, i, j, c, D, st, dr, ok=0, mij, nr=0; ^~ main.cpp:12:35: warning: unused variable 'ok' [-Wunused-variable] int n, d, i, j, c, D, st, dr, ok=0, mij, nr=0; ^~ main.cpp:12:41: warning: unused variable 'mij' [-Wunused-variable] int n, d, i, j, c, D, st, dr, ok=0, mij, nr=0; ^~~ main.cpp:12:46: warning: unused variable 'nr' [-Wunused-variable] int n, d, i, j, c, D, st, dr, ok=0, mij, nr=0; ^~