Compilare: main.cpp: In function 'int main()': main.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); ++i) { ~~^~~~~~~~~~ main.cpp:55:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i] != v[i] || s.size() > n) { ~~~~~~~~~^~~