Compilare: user.cpp: In function ‘void drum(int, int)’: user.cpp:16:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:39:28: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] for(i=1;i<=nr-(1<<k-1);i++){ ^ user.cpp:41:46: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(D[k][i].first > D[k-1][i+(1<<k-1)].first){ ^ user.cpp:42:39: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] D[k][i]=D[k-1][i+(1<<k-1)]; ^