Compilare: user.cpp: In function ‘int main()’: user.cpp:74:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < str.size(); ++ i) { ~~^~~~~~~~~~~~ user.cpp:77:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i >= pattern.size() - 1) { ~~^~~~~~~~~~~~~~~~~~~~~ user.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ans.size(); ++ i) ~~^~~~~~~~~~~~ user.cpp:89:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] cout << ans[i] << " \n"[i + 1 == ans.size()]; ~~~~~~^~~~~~~~~~~~~ user.cpp: In instantiation of ‘static void Hasher<B, MOD>::resize(int) [with int B = 263; int MOD = 1000000007]’: user.cpp:63:11: required from here user.cpp:11:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (newSz > pows.size()) { ~~~~~~^~~~~~~~~~~~~ user.cpp: In instantiation of ‘static void Hasher<B, MOD>::resize(int) [with int B = 277; int MOD = 1000000009]’: user.cpp:64:11: required from here user.cpp:11:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]