Compilare: user.cpp: In function ‘void write(int, int)’: user.cpp:71:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s[node].size(); ++i) ^ user.cpp:75:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s[node].size() - a[t[node][st].nod][node]; ++i) ^