Compilare: user.cpp: In function ‘long long int hami(long long int, int)’: user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[nod].size();i++) ^ user.cpp:19:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x; ^ user.cpp: In function ‘int main()’: user.cpp:49:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[0].size();i++) ^ user.cpp:39:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,n,m,x,y; long long val=0; muc aux; char s[30],*t; ^ user.cpp:39:53: warning: unused variable ‘s’ [-Wunused-variable] int i,j,n,m,x,y; long long val=0; muc aux; char s[30],*t; ^ user.cpp:39:60: warning: unused variable ‘t’ [-Wunused-variable] int i,j,n,m,x,y; long long val=0; muc aux; char s[30],*t; ^ user.cpp:40:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.cpp:43:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&x,&y,&aux.c); ^