Compilare: user.cpp: In function ‘int BFS1()’: user.cpp:43:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[k].size();i++) ^ user.cpp: In function ‘void Edmonds_Karp()’: user.cpp:61:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[N].size();i++) ^ user.cpp: In function ‘void BFS(int, int)’: user.cpp:89:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[k].size();i++) ^ user.cpp: In function ‘void Write()’: user.cpp:113:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^ user.cpp: In function ‘void Read()’: user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("critice.in","r",stdin); ^ user.cpp:20:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&M); ^ user.cpp:23:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&z); ^ user.cpp: In function ‘void Write()’: user.cpp:111:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("critice.out","w",stdout); ^