Compilare: main.cpp: In function 'int main()': main.cpp:21:9: warning: unused variable 'target' [-Wunused-variable] 21 | int target, st, dr, middle, ans = -1; | ^~~~~~ main.cpp:21:17: warning: unused variable 'st' [-Wunused-variable] 21 | int target, st, dr, middle, ans = -1; | ^~ main.cpp:21:21: warning: unused variable 'dr' [-Wunused-variable] 21 | int target, st, dr, middle, ans = -1; | ^~ main.cpp:21:25: warning: unused variable 'middle' [-Wunused-variable] 21 | int target, st, dr, middle, ans = -1; | ^~~~~~ main.cpp:21:33: warning: unused variable 'ans' [-Wunused-variable] 21 | int target, st, dr, middle, ans = -1; | ^~~