Compilare: user.cpp: In function ‘int main()’: user.cpp:154:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < cycle.size(); i++) { ^ 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:2: user.cpp:162:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(cycle.size() == M + 1); ^ user.cpp:163:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = where; i < cycle.size(); i++) { ^