Compilare: user.cpp: In function ‘void create_arb(int, int, int)’: user.cpp:60:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i<arb[L].size(); ++i) ^ user.cpp:67:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i<arb[L].size() + arb[R].size(); ++i) ^ user.cpp:80:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<arb[node].size(); ++i) ^ user.cpp: In function ‘void query(int, int, int)’: user.cpp:136:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (mid != arb[node].size() - 1) ^ user.cpp:145:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (mid == arb[node].size()-1) ^ user.cpp: In function ‘int main()’: user.cpp:185:9: warning: unused variable ‘mini’ [-Wunused-variable] int mini = 1; ^ user.cpp: In function ‘void query(int, int, int)’: user.cpp:154:22: warning: ‘val1’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if (val1 >= val) ^