Compilare: user.cpp: In function ‘void make_H()’: user.cpp:28:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=1; j<=s[i].size(); j++){ ^ user.cpp: In function ‘void make_lung()’: user.cpp:89:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = max(0 , (int)s[i].size() - (int)s[j].size()); k < s[i].size(); k++){ ^ user.cpp: In function ‘int main()’: user.cpp:186:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = s[last+1].size() - 1; j > s[last+1].size() - 1 - lung[i+1][last+1]; j--){ ^