Compilare: user.cpp: In function ‘bool found(int, int)’: user.cpp:22:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < h[hash1].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:36:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); ++i) { ^ user.cpp:60:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = n; i < bigString.size(); ++i) { ^