Compilare: user.cpp: In function ‘int main()’: user.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < a.size(); ++i){ ^ user.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < b.size(); ++i){ ^ user.cpp:33:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q == a.size()-1){ ^ user.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < b.size(); ++i){ ^ user.cpp:53:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(b[k-1] == a[a.size() - (i-k+1)] && k > 1 && (i- k + 1) < a.size()) --k; ^ user.cpp:54:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(b[j+1] == a[j+1-jj] && j < b.size() - 1) ++j; ^