Compilare: user.cpp: In function ‘void Dijkstra(int)’: user.cpp:40:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < L[el.d].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:103:19: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (S&(1 << j) == 0) ^ user.cpp:107:33: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (t != j && (S & (1 << t) != 0)) ^