Compilare: main.cpp: In function 'int main()': main.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(l1 < nums[lq].size() && l2 < nums[rq].size()) ~~~^~~~~~~~~~~~~~~~~ main.cpp:71:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(l1 < nums[lq].size() && l2 < nums[rq].size()) ~~~^~~~~~~~~~~~~~~~~ main.cpp:52:68: warning: unused variable 'num1' [-Wunused-variable] int n, q, t, sz, l, r, mid, ans, l1, l2, lq, rq, tot = 0, num, num1, num2; ^~~~ main.cpp:52:74: warning: unused variable 'num2' [-Wunused-variable] int n, q, t, sz, l, r, mid, ans, l1, l2, lq, rq, tot = 0, num, num1, num2; ^~~~ main.cpp:53:10: warning: unused variable 'good' [-Wunused-variable] bool good; ^~~~ main.cpp:94:28: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << all[ans] << '\n'; ^