Compilare: main.cpp: In function 'int main()': main.cpp:77:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos < buckets[i].size() && qry[buckets[i][pos]].y == j){ ~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:69:13: warning: unused variable 'st' [-Wunused-variable] int st = poz_bucket[i].first, dr = poz_bucket[i].second, pos = 0; ^~