Compilare: user.cpp: In function ‘int main()’: user.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < t.size(); ++i){ ^ user.cpp:27:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+rad < t.size() && i-rad >= 0 && t[i-rad] == t[i+rad]) ^ user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < t.size(); ++i) ^ user.cpp:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < w.size(); ++i){ ^ user.cpp:75:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = last+1; i < w.size(); ++i) ^ user.cpp:50:11: warning: ‘I’ may be used uninitialized in this function [-Wmaybe-uninitialized] I /= 2; ^