Compilare: user.cpp: In instantiation of ‘T MaxFlow<T>::dfs(int, T) [with T = int]’: user.cpp:98:31: required from ‘T MaxFlow<T>::dinic() [with T = int]’ user.cpp:27:21: required from ‘T MaxFlow<T>::maxflow() [with T = int]’ user.cpp:120:24: required from here user.cpp:73:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (index[node] < graph[node].size()) {