#include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; #define Would #define you const int INF = 999999999; const int MOD = 1e9 + 7; const double pi = 3.141592653589793238; double mon = 0.1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991; int main() { double n; cin >> n; cout << setprecision(200) << n * mon << endl; }