Compilare: user.cpp: In function ‘void addEdge(int, int, int, int)’: user.cpp:29:37: warning: narrowing conversion of ‘g[to].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[from].push_back({to , g[to].size() , cap , 0, index }); ~~~~~~~~~~^~ user.cpp:30:42: warning: narrowing conversion of ‘(g[from].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >() - 1u)’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[to].push_back({from , g[from].size() - 1 , cap , 0 , index} ); ~~~~~~~~~~~~~~~^~~ user.cpp: In function ‘bool bfs()’: user.cpp:45:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ;h++){ ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int dfs(int, int)’: user.cpp:61:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int &h = rem[node] ; h < g[node].size() ;h++){ ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int maxflow()’: user.cpp:82:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok = 0; ^~ user.cpp: In function ‘void mark(int, int)’: user.cpp:101:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ;h++){ ~~^~~~~~~~~~~~~~~~