Compilare: main.cpp: In function 'int bfs()': main.cpp:57:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i = 0; i < v[prElem].size(); i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void max_flow()': main.cpp:79:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for (int i = 0; i < v[2 * N + 1].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void write()': main.cpp:110:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for (int j = 0; j < sol[i].size(); j++) | ~~^~~~~~~~~~~~~~~