Compilare: main.cpp: In function 'int main()': main.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<elem[pos].size();i++) if(elem[pos][i]^v==elem[pos][i]-v) {ok=false;break;} ~^~~~~~~~~~~~~~~~~ main.cpp:37:62: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses] for(int i=0;i<elem[pos].size();i++) if(elem[pos][i]^v==elem[pos][i]-v) {ok=false;break;} ~^~~~~~~~~~~~~~~~ main.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:56:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<elem[nod[pos][i].first].size();j++) if(elem[nod[pos][i].first][j]^counter==elem[nod[pos][i].first][j]-counter) {k=false;break;} ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:56:100: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses] for(int j=0;j<elem[nod[pos][i].first].size();j++) if(elem[nod[pos][i].first][j]^counter==elem[nod[pos][i].first][j]-counter) {k=false;break;} ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~