Compilare: main.cpp: In function 'void addEdge(int, int, int)': main.cpp:30:42: warning: narrowing conversion of 'g[y].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()' from 'std::vector<Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] g[x].push_back({y , 0 , cap , g[y].size()}); ~~~~~~~~~^~ main.cpp:31:43: warning: narrowing conversion of '(g[x].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >() - 1ul)' from 'std::vector<Edge>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] g[y].push_back({x , 0 , 0 , g[x].size() - 1}); ~~~~~~~~~~~~^~~ main.cpp: In function 'bool bfs()': main.cpp:67:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ; h++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:85:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int &h = last[node] ; h < g[node].size() ; h++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int maxflow()': main.cpp:114:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^