Compilare: user.cpp: In function ‘void addedge(int, int, int, int)’: user.cpp:52:37: warning: narrowing conversion of ‘g[j].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge direct = {ind, j, g[j].size(), 0, c}; ^ user.cpp:53:37: warning: narrowing conversion of ‘g[i].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] Edge inverse = {ind, i, g[i].size(), 0, c}; ^ user.cpp: In function ‘bool bfs()’: user.cpp:86:37: 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:104:45: 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:140:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ig[from].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:156:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < g[i].size(); j++) { ^ user.cpp:169:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ^ user.cpp:184:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ^