Compilare: main.cpp: In function 'bool ok()': main.cpp:10:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < aux.size(); ++i) ~~^~~~~~~~~~~~ main.cpp:11:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < aux.size(); ++j) ~~^~~~~~~~~~~~ main.cpp:12:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int q = j + 1; q < aux.size(); ++q) ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v.size(); ++i) ~~^~~~~~~~~~