Compilare: In file included from /usr/include/c++/4.8/cassert:43:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:33, from user.cpp:1: user.cpp: In function ‘ll do_dyn(const std::vector<std::vector<punct> >&)’: user.cpp:48:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(j < shortest.size()); ^ user.cpp:49:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(l < shortest[j].size()); ^ user.cpp:50:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(k < shortest[i].size()); ^ user.cpp:56:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(i < pts.back().size()); ^ user.cpp: In function ‘void do_test()’: user.cpp:68:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(poly.size() == n); ^