Compilare: main.cpp: In function 'int main()': main.cpp:70:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<query>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for(int x=0; x<v[b].size();++x) | ~^~~~~~~~~~~~ main.cpp:63:13: warning: unused variable 'l' [-Wunused-variable] 63 | int l=(b-1)*bucklen+1; | ^ main.cpp:64:13: warning: unused variable 'r' [-Wunused-variable] 64 | int r=b*bucklen; | ^ main.cpp:81:27: warning: array subscript -1 is below array bounds of 'int [100005]' [-Warray-bounds] 81 | fr[a[i]]++; | ~~~^ main.cpp:31:5: note: while referencing 'a' 31 | int a[100005]; | ^