Compilare: main.cpp: In function 'int main()': main.cpp:111:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 111 | while(l < xx.size() && xx[l].first <=q[i].k) | ~~^~~~~~~~~~~ main.cpp:120:13: warning: unused variable 'a' [-Wunused-variable] 120 | int a = query(st[q[i].x]); | ^ main.cpp:121:13: warning: unused variable 'b' [-Wunused-variable] 121 | int b =query(st[q[i].y]); | ^ main.cpp:122:13: warning: unused variable 'c' [-Wunused-variable] 122 | int c =query(st[lc]); | ^ main.cpp:123:13: warning: unused variable 'd' [-Wunused-variable] 123 | int d =query(st[p[0][lc]]); | ^