Compilare: user.cpp: In function ‘void add(int, int)’: user.cpp:33:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[s].size();++i) if(!D[start][v[s][i]] && w[s][i] <= cap[start]) ^ user.cpp: In function ‘void BFS(int)’: user.cpp:87:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[s].size();++i) if(!viz[v[s][i]] && w[s][i] <= cap[1]) ^ user.cpp: In function ‘int main()’: user.cpp:105:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&t,&n,&m); ^ user.cpp:106:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;++i) fscanf(f,"%d",&cap[i]); ^ user.cpp:109:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&a,&b,&d); ^