Compilare: user.cpp: In function ‘void reset()’: user.cpp:119:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<edg.size();++i) ^ user.cpp:118:9: warning: unused variable ‘n’ [-Wunused-variable] int n=edg.size(); ^ user.cpp: In function ‘bool posibil(int)’: user.cpp:128:12: warning: unused variable ‘y’ [-Wunused-variable] int mx,y; ^ user.cpp: In function ‘int main()’: user.cpp:159:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i %i",&n,&m); ^ user.cpp:163:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i %i %i",&st[i],&dr[i],&nr[i]); ^