Compilare: main.cpp: In function 'int main()': main.cpp:65:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<v[i].size() && a[v[i][j]]<a[st[k]]) ~^~~~~~~~~~~~ main.cpp:73:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<v[i].size() && a[v[i][j]]<a[st[k]]) ~^~~~~~~~~~~~ main.cpp:115:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<v[i].size() && a[v[i][j]]<a[st[k]]) ~^~~~~~~~~~~~ main.cpp:123:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<v[i].size() && a[v[i][j]]<a[st[k]]) ~^~~~~~~~~~~~