Compilare: main.cpp: In member function 'void ford_fulkerson::init()': main.cpp:29:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i = 0; i < graph.size(); i++){ | ~~^~~~~~~~~~~~~~ main.cpp:30:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int j = 0; j < graph[i].size(); j++){ | ~~^~~~~~~~~~~~~~~~~ main.cpp: In member function 'bool ford_fulkerson::find_and_update(int, int, int&)': main.cpp:48:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i = 0; i < edge_indexes[u].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~~~~~~~