Compilare: user.cpp: In function ‘void create_arb(int, int, int)’: user.cpp:57:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i<arb[L].size(); ++i) ^ user.cpp:60:99: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (v[arb[node][i]].x < v[arb[node][mini]].x || v[arb[node][i]].x == v[arb[node][mini]].x && v[arb[node][i]].y < v[arb[node][mini]].y) ^ user.cpp:64:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i<arb[L].size() + arb[R].size(); ++i) ^ user.cpp:67:99: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (v[arb[node][i]].x < v[arb[node][mini]].x || v[arb[node][i]].x == v[arb[node][mini]].x && v[arb[node][i]].y < v[arb[node][mini]].y) ^ user.cpp:77:36: 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:134:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (mid != arb[node].size() - 1) ^ user.cpp:143:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (mid == arb[node].size()-1) ^ user.cpp:127:18: warning: unused variable ‘ok1’ [-Wunused-variable] bool ok1 = 0, ok2 = 0; ^ user.cpp:127:27: warning: unused variable ‘ok2’ [-Wunused-variable] bool ok1 = 0, ok2 = 0; ^ user.cpp: In function ‘int main()’: user.cpp:183:9: warning: unused variable ‘mini’ [-Wunused-variable] int mini = 1; ^ user.cpp: In function ‘void query(int, int, int)’: user.cpp:152:22: warning: ‘val1’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if (val1 >= val) ^