Compilare: main.cpp: In member function 'int Dinic::DFS_sendflow(int, int)': main.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;ind[node]<gr[node].size();ind[node]++){ main.cpp: In member function 'void Dinic::AddEdge(int, int, int)': main.cpp:63:40: warning: narrowing conversion of '(&((Dinic*)this)->Dinic::gr.std::vector<_Tp, _Alloc>::operator[]<std::vector<Dinic::Edge>, std::allocator<std::vector<Dinic::Edge> > >(((std::vector<std::vector<Dinic::Edge> >::size_type)y)))->std::vector<_Tp, _Alloc>::size<Dinic::Edge, std::allocator<Dinic::Edge> >()' from 'std::vector<Dinic::Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] gr[x].push_back({y,0,cap,gr[y].size()}); ~~~~~~~~~~^~ main.cpp:64:40: warning: narrowing conversion of '((&((Dinic*)this)->Dinic::gr.std::vector<_Tp, _Alloc>::operator[]<std::vector<Dinic::Edge>, std::allocator<std::vector<Dinic::Edge> > >(((std::vector<std::vector<Dinic::Edge> >::size_type)x)))->std::vector<_Tp, _Alloc>::size<Dinic::Edge, std::allocator<Dinic::Edge> >() - 1ul)' from 'std::vector<Dinic::Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] gr[y].push_back({x,0,0,gr[x].size()-1}); ~~~~~~~~~~~~^~ main.cpp: In function 'int main()': main.cpp:90:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("necromancer.in","r",stdin); ^ main.cpp:91:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("necromancer.out","w",stdout); ^