Compilare: main.cpp: In function 'void add_edge(long long int, long long int, long long int)': main.cpp:26:45: warning: narrowing conversion of 'adj[v].std::vector<edge>::size()' from 'std::vector<edge>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing] 26 | adj[u].push_back({v, cap, 0, adj[v].size()}); | ~~~~~~~~~~~^~ main.cpp:27:46: warning: narrowing conversion of '(adj[u].std::vector<edge>::size() - 1)' from 'std::vector<edge>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing] 27 | adj[v].push_back({u, 0, 0, adj[u].size() - 1}); | ~~~~~~~~~~~~~~^~~ main.cpp: In function 'long long int dfs(long long int, long long int)': main.cpp:35:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int &i = ptr[nod]; i < adj[nod].size(); i++) { | ~~^~~~~~~~~~~~~~~~~