Compilare: main.cpp: In function 'int main()': main.cpp:64:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<gr[i].size(); j++) ~^~~~~~~~~~~~~ main.cpp:82:43: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(apar_buck[a[k]]==0 && frecv[a[k]]>apar_maxim2 || (frecv[a[k]]==apar_maxim2 && a[k]<elem_maxim2)) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:111:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size(); i++) ~^~~~~~~~~