Compilare: main.cpp: In function 'bool Valid(int)': main.cpp:42:9: warning: unused variable 'i' [-Wunused-variable] 42 | int i, j, c1, c2, c3, c4; | ^ main.cpp:42:12: warning: unused variable 'j' [-Wunused-variable] 42 | int i, j, c1, c2, c3, c4; | ^ main.cpp: In function 'void Cb()': main.cpp:70:9: warning: unused variable 'i' [-Wunused-variable] 70 | int i, j, st, dr, mij, sol = 2001; | ^ main.cpp:70:12: warning: unused variable 'j' [-Wunused-variable] 70 | int i, j, st, dr, mij, sol = 2001; | ^