Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:85:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘double query(int, int, int, int, int, int)’: user.cpp:118:19: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] if(L > R || L > y | R < x) ^ user.cpp: In function ‘int main()’: user.cpp:161:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < V[j].size(); k++) ^