Compilare: user.cpp: In function ‘void RMQ()’: user.cpp:65:23: warning: unused variable ‘lu’ [-Wunused-variable] const int lu = 1 << (i-1); ^ user.cpp: In function ‘int Solve(int, int)’: user.cpp:118:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; fr[lca][i] <= x && i < fr[lca].size(); i++); ^ user.cpp: In function ‘int main()’: user.cpp:154:21: warning: unused variable ‘con’ [-Wunused-variable] int lastk = -1, con = 1; ^