Compilare: main.cpp: In function 'int main()': main.cpp:29:6: warning: unused variable 'st' [-Wunused-variable] int st = 0, dr = 2e9, mij, ans = 0; ^~ main.cpp:29:14: warning: unused variable 'dr' [-Wunused-variable] int st = 0, dr = 2e9, mij, ans = 0; ^~ main.cpp:29:24: warning: unused variable 'mij' [-Wunused-variable] int st = 0, dr = 2e9, mij, ans = 0; ^~~