Compilare: main.cpp:72:1: warning: "/*" within comment [-Wcomment] /* main.cpp: In function 'int main()': main.cpp:37:15: warning: variable 'mat' set but not used [-Wunused-but-set-variable] long long mat[nmax][nmax]; ^~~ main.cpp:52:9: warning: unused variable 'val1' [-Wunused-variable] int val1=det_sum_mx(a,n,pi_a,pf_a); ^~~~ main.cpp:53:9: warning: unused variable 'val2' [-Wunused-variable] int val2=det_sum_mx(b,m,pi_b,pf_b); ^~~~