Compilare: user.cpp: In function ‘mat inm(mat&, mat&)’: user.cpp:23:15: warning: unused variable ‘s’ [-Wunused-variable] long long s; ^ user.cpp: In function ‘int main()’: user.cpp:81:52: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d ",(1LL*x0*rez.a[0][0]+rez.a[1][0])%M); ^ /tmp/ccD0s8NA.o: In function `main': user.cpp:(.text.startup+0x1c0): warning: the `gets' function is dangerous and should not be used.