Compilare: main.cpp: In function 'int main()': main.cpp:38:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < adiacent[coada[i]].size(); ++j) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:94:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < frecventa.size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp:100:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < frecventa.size(); ++i) ~~^~~~~~~~~~~~~~~~~~