Compilare: In file included from /usr/include/c++/6/cassert:44:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:33, from main.cpp:1: main.cpp: In function 'f64 solve(int)': main.cpp:95:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(topsort.size() == n + 1); ~~~~~~~~~~~~~~~^~~~~~~~