Compilare: user.cpp: In function ‘void manachers()’: user.cpp:28:23: warning: unused variable ‘lft’ [-Wunused-variable] int mid=0, rgt=0, lft=0; ^~~ user.cpp: In function ‘void solve()’: user.cpp:47:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for ( int i = 1 ; i <= n ; i ++ ) ^~~ user.cpp:49:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ g << ans; ^