Compilare: main.cpp: In function 'void bellmanford(int)': main.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(i = 0; i < adj[u].size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int dijkstra(int, int)': main.cpp:91:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for(i = 0; i < v[u.u].size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:107:14: warning: unused variable 'j' [-Wunused-variable] 107 | ll m, i, j, src, dest, a, b, c, w, new_cost, flow, new_flow, u, ans; | ^