Compilare: main.cpp: In function 'int cb1(int)': main.cpp:13:41: warning: unused variable 'ans' [-Wunused-variable] 13 | int st = 0, dr = a.size() - 1, mid, ans = -1; | ^~~ main.cpp: In function 'int cb2(int)': main.cpp:27:41: warning: unused variable 'ans' [-Wunused-variable] 27 | int st = 0, dr = a.size() - 1, mid, ans = -1; | ^~~ main.cpp: In function 'int cb3(int)': main.cpp:41:41: warning: unused variable 'ans' [-Wunused-variable] 41 | int st = 0, dr = a.size() - 1, mid, ans = -1; | ^~~