Compilare: main.cpp: In function 'int main()': main.cpp:28:3: warning: 'op' may be used uninitialized in this function [-Wmaybe-uninitialized] 28 | if (op == 0) | ^~ main.cpp:29:57: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] 29 | fout << (a[upper_bound(a + 1, a + n + 1, x) - a - 1] == x ? upper_bound(a + 1, a + n + 1, x) - a - 1 : -1) << '\n'; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~