Compilare: user.cpp: In function ‘void addedge(int, int)’: user.cpp:59:31: 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 = {j, g[j].size(), 0, capacity, coste}; ^ user.cpp:60:32: 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 = {i, g[i].size(), 0, 0, -coste}; ^ user.cpp: In function ‘void bellmanford()’: user.cpp:78:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ^ user.cpp: In function ‘void dijkstra()’: user.cpp:108:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:186:36: 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] g[src].push_back({i, g[i].size(), 0, a[pts[i].x][pts[i].y] - aim, 0}); ^ user.cpp:187:38: warning: narrowing conversion of ‘g[src].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[i].push_back({src, g[src].size(), 0, 0, 0}); ^ user.cpp:191:40: warning: narrowing conversion of ‘g[dest].std::vector<_Tp, _Alloc>::size<Edge, std::allocator<Edge> >()’ from ‘std::vector<Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[i].push_back({dest, g[dest].size(), 0, aim - a[pts[i].x][pts[i].y], 0}); ^ user.cpp:192:37: 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] g[dest].push_back({i, g[i].size(), 0, 0, 0}); ^