Language: C++

#include<bits/stdc++.h>

using  namespace  std;

#define PI              acos(-1.0)
#define lcm(a,b)        (a * (b / __gcd(a,b)))
#define en '\n'

#define READ_IN freopen("Input.txt","r",stdin);
#define READ_OUT freopen("Output.txt","w",stdout);
#define Infi                0x3f3f3f3f

const int dx[] = {+1,-1,+0,+0};                         // 4 X directions
const int dy[] = {+0,+0,+1,-1};                         // 4 Y directions
const int dx8[] = {+0,+0,+1,-1,-1,+1,-1,+1};            // King X Moves
const int dy8[] = {-1,+1,+0,+0,+1,+1,-1,-1};            // King Y Moves
const int kx[] = {-2, -2, -1, -1,  1,  1,  2,  2};      // Knight X Moves
const int ky[] = {-1,  1, -2,  2, -2,  2, -1,  1};      // Knight Y Moves



int  Set    (int N,int pos) {return N=N | (1<<pos);}    /// turn a bit on
int  reset  (int N,int pos) {return N= N & ~(1<<pos);}  /// turn a bit off
bool check  (int N,int pos) {return (bool)(N & (1<<pos));} /// check, if a bit is on or not

void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(1const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define trace(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define trace(x...)
#endif

typedef long long int           ll;
typedef unsigned long long int  llu;


int main(void){

   // READ_IN;
   double x;
   cin >> x;

   double ck = x/3.0;

   cout << fixed << setprecision(13) << ck*ck*ck << endl;


    return 0;
}




Compiler output:
a.cc:41:6: error: variable or field '__print' declared void
   41 | void __print(1const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
      |      ^~~~~~~
a.cc:41:14: error: unable to find numeric literal operator 'operator""const'
   41 | void __print(1const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
      |              ^~~~~~
a.cc:41:30: error: expected primary-expression before '>' token
   41 | void __print(1const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
      |                              ^
a.cc:41:33: error: 'x' was not declared in this scope
   41 | void __print(1const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
      |                                 ^