Compilare: main.cpp: In function 'void uneste()': main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < imp.size(); i += 2) { ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < ans.size(); ++j) ~~^~~~~~~~~~~~ main.cpp:105:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ptr < ans.size() - 1) { ~~~~^~~~~~~~~~~~~~~~