Compilare: user.cpp: In function ‘int cauta(int)’: user.cpp:8:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘int main()’: user.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(a=0;a<m;a++) ^ user.cpp:56:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(a=0;a<m;a++) ^ user.cpp:30:30: warning: unused variable ‘b’ [-Wunused-variable] int n,s,i,j,k,s2,s3,ok2=0,a,b; ^