Compilare: user.cpp: In function ‘int bfs()’: user.cpp:23:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[k].size();i++) ^ user.cpp: In function ‘void dinic()’: user.cpp:39:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[d].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:60:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d",&n,&m); ^ user.cpp:63:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d",&x,&y); ^ user.cpp:66:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&c[x][y]); ^