Compilare: user.cpp: In function ‘int main()’: user.cpp:46:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz[j].back().first == s[j].size() + 1) { ^ user.cpp:54:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] cnt += (poz[j].back().first <= s[j].size()); ^ user.cpp:61:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (last == s[j].size()) poz[j].emplace_back(last + 1, 1); ^ user.cpp:62:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (last == s[j].size() + 1)poz[j].back().second++; ^ user.cpp:65:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] cnt += (last <= s[j].size()); ^