Compilare: user.cpp: In function ‘bool find(unsigned int)’: user.cpp:21:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < h[val % MOD].size() && !ok; i++) ^ user.cpp: In function ‘int main()’: user.cpp:33:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < word.size(); i++) ^ user.cpp:39:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < n; i++) ^ user.cpp:42:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = n; i < text.size(); i++) { ^