Compilare: user.cpp: In function ‘void Biconex(int, int)’: user.cpp:202:9: warning: unused variable ‘x’ [-Wunused-variable] int x,p; ^ user.cpp:202:11: warning: unused variable ‘p’ [-Wunused-variable] int x,p; ^ user.cpp: In function ‘int main()’: user.cpp:246:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++) ^ user.cpp: In function ‘void read()’: user.cpp:159:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&m); ^ user.cpp:162:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:241:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.out","w",stdout); ^