Compilare: user.cpp: In function ‘void solve2()’: user.cpp:36:9: warning: unused variable ‘fi’ [-Wunused-variable] i64 fi; ^~ user.cpp: In function ‘int main()’: user.cpp:54:9: warning: unused variable ‘x’ [-Wunused-variable] i64 x , n , val ; ^ user.cpp:54:13: warning: unused variable ‘n’ [-Wunused-variable] i64 x , n , val ; ^ user.cpp:54:17: warning: unused variable ‘val’ [-Wunused-variable] i64 x , n , val ; ^~~ user.cpp: In function ‘void solve1()’: user.cpp:15:13: warning: ‘lasti’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i , lasti; ^~~~~