Compilare: user.cpp: In function ‘void addedge(int, int, int, int)’: user.cpp:36:30: warning: narrowing conversion of ‘g[y].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge direct = {y, g[y].size(), 0, cap, ind}; ^ user.cpp:37:31: warning: narrowing conversion of ‘g[x].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge inverse = {x, g[x].size(), 0, cap, ind}; ^ user.cpp: In function ‘bool bfs()’: user.cpp:54:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ^ user.cpp: In function ‘int dfs(int, int)’: user.cpp:70:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = rem[from]; i < g[from].size(); i++) { ^ user.cpp: In function ‘bool finalbfs(int)’: user.cpp:111:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[node].size(); i++) { ^ user.cpp:108:9: warning: unused variable ‘from’ [-Wunused-variable] int from = q.front(); ^ user.cpp: In function ‘int main()’: user.cpp:153:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ^ user.cpp:169:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j =0; j < g[i].size(); j++) { ^ user.cpp:179:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ^ user.cpp: In function ‘bool finalbfs(int)’: user.cpp:123:1: warning: control reaches end of non-void function [-Wreturn-type] } ^