criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <bits/stdc++.h>

using namespace std;
using llong = long long;
using ldbl = long double;
using lpair = pair<llong, llong>;

#define ALL(x) x.begin(), x.end()

const llong inf = 1'000'000'000'000'007ll;
const llong mod = 998244353;

int main() {
	llong N;
	string S;

	cin >> N >> S;
	reverse(ALL(S));

	vector<llong> v = {1};
	for (int i = 0; i < N; ++i)
		v.push_back(v.back()*2ll%mod);

	llong ans = 0;
	for (int i = 0; i < N; ++i) {
		if (S[i] == '1') {
			ans += v[i] * N*2 % mod;
			// ans += v[i];
		}
	}

	string b1 = "", b2 = "";
	for (int i = 0; i < N; ++i) {
		if (i%2) {
			b1 += "1";
			b2 += "0";
		} else {
			b1 += "0";
			b2 += "1";
		}
	}

	if (S >= b1)
		ans -= N*2 - 2;
	if (S >= b2)
		ans -= N*2 - 2;

	cout << ans << endl;


	return 0;
}#include <bits/stdc++.h>

using namespace std;
using llong = long long;
using ldbl = long double;
using lpair = pair<llong, llong>;

#define ALL(x) x.begin(), x.end()

const llong inf = 1'000'000'000'000'007ll;
const llong mod = 998244353;

int main() {
	llong N;
	string S;

	cin >> N >> S;
	reverse(ALL(S));

	vector<llong> v = {1};
	for (int i = 0; i < N; ++i)
		v.push_back(v.back()*2ll%mod);

	llong ans = 0;
	for (int i = 0; i < N; ++i) {
		if (S[i] == '1') {
			ans += v[i] * N*2 % mod;
			// ans += v[i];
		}
	}

	string b1 = "", b2 = "";
	for (int i = 0; i < N; ++i) {
		if (i%2) {
			b1 += "1";
			b2 += "0";
		} else {
			b1 += "0";
			b2 += "1";
		}
	}

	if (S >= b1)
		ans -= N*2 - 2;
	if (S >= b2)
		ans -= N*2 - 2;

	cout << ans << endl;


	return 0;
}

Compiler output:
a.cc:52:2: error: stray '#' in program
   52 | }#include <bits/stdc++.h>
      |  ^
a.cc:52:3: error: 'include' does not name a type
   52 | }#include <bits/stdc++.h>
      |   ^~~~~~~
a.cc:61:13: error: redefinition of 'const llong inf'
   61 | const llong inf = 1'000'000'000'000'007ll;
      |             ^~~
a.cc:10:13: note: 'const llong inf' previously defined here
   10 | const llong inf = 1'000'000'000'000'007ll;
      |             ^~~
a.cc:62:13: error: redefinition of 'const llong mod'
   62 | const llong mod = 998244353;
      |             ^~~
a.cc:11:13: note: 'const llong mod' previously defined here
   11 | const llong mod = 998244353;
      |             ^~~
a.cc:64:5: error: redefinition of 'int main()'
   64 | int main() {
      |     ^~~~
a.cc:13:5: note: 'int main()' previously defined here
   13 | int main() {
      |     ^~~~
Language: C++

#include "bits/stdc++.h"
using namespace std;
#ifdef ONLINE_JUDGE
#define trace(...)
#endif

using LL = long long;

string bin(int x, int n) {
	string res;
	while (n--) {
		res.push_back('0'+ x % 2);
		x >>= 1;
	}
	return res;
}

void test(int n, string X = "") {
	trace(n);
	map<int, int> freq;
	int lim = 1 << n;
	if (!X.empty()) {
		lim = 0;
		for (char ch: X) lim = lim * 2 + ch - '0';
	}
	for (int x = 0; x < lim; x++) {
		int y = x;
		int c = 0;
		do {
			y = (y >> 1) | (((y & 1) ^ 1) << (n - 1));
			c++;
		} while (y != x);
		string z = bin(x, n);
		if (!freq[c]) {
			trace(z, c, c/2, x);
		}
		freq[c]++;
	}
	for (auto [c, f]: freq) {
		trace(c, f);
	}
}

const int N = 2e5 + 10;
const LL MOD = 998244353;
LL nf[N];

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);

	// for (int n; cin >> n; test(n)); return 0;

	int n; cin >> n;
	string X; cin >> X;

	// test(n, X);

	int p2 = 1;
	while (n % p2 == 0) p2 *= 2;
	p2 /= 2;
	int odd = n / p2;

	LL ans = 0;
	for (int i = 1; i <= n; i++) {
		if (i % p2 != 0) continue;
		if (odd % (i / p2) != 0) continue;
		// if X has period p2*i, then use X[0..i-1], else X[0..i-1] - 1
		bool valid = true;
		for (int j = 0; valid && j + i < n; j++) {
			if (X[j] == X[j + i]) valid = false;
		}

		LL pref = 0;
		for (int j = 0; j < i; j++) {
			pref = (pref * 2 + (X[j] - '0')) % MOD;
		}
		if (!valid) {
			for (int j = 0; j < n; j++) {
				char curr = X[j % i];
				if ((j / i) % 2 == 1) curr = curr == '0' ? '1' : '0';
				if (curr < X[j]) {
					valid = true;
					break;
				}
				if (curr > X[j]) {
					break;
				}
			}
		}
		if (valid) {
			pref = (pref + 1) % MOD;
		}

		nf[i] = pref;
		for (int j = 1; j < i; j++) {
			if (i % j == 0) nf[i] -= nf[j];
		}
		nf[i] %= MOD;
		nf[i] += MOD;
		nf[i] %= MOD;
		trace(i, valid, nf[i]);
		ans += (i * nf[i]) % MOD;
	}

	LL nx = 0;
	for (char ch: X) nx = (nx * 2 + ch - '0') % MOD;
	for (int i = 1; i <= odd; i++) {
		nx -= nf[i];
	}
	nx %= MOD;
	nx += MOD;
	nx %= MOD;
	// ans += (nx * odd) % MOD;


	ans = (ans * 2) % MOD;
	cout << ans << endl;
	
	return 0;
}


Compiler output:
a.cc: In function 'void test(int, std::string)':
a.cc:19:9: error: 'trace' was not declared in this scope
   19 |         trace(n);
      |         ^~~~~
a.cc: In function 'int main()':
a.cc:101:17: error: 'trace' was not declared in this scope
  101 |                 trace(i, valid, nf[i]);
      |                 ^~~~~
Language: C++

        /*vvv>
        zzzzzI
 .---.  zzuzuI                 .vgggg&,.
+++++=  dAC:|I  .WbbWo       JMM9^```?TMB`  ..&gNNg,.   gggggggJ,   qgggggggg] (&&&&&&&&[   c+OA&J,   (&&&&&&+J,   .cJeAA&-.  (&&&&&&&&x   .&AA&=-.
+++++=  dTqk|I  Xpbpbp      JM#`           (M#^   ?MMp  MM|   +TMN. JMF      ' |yk      ` dVY    7Vk,  Vy     XV  cVf     ?Y!  JM         V$      `
+++++=  dcf:|I  Xppppp      dMN           .MM+     .MM  MM|     MM] JMMMMMM+   |@tqkoh)  ,y0      (V$  yyyyyyyV7  VV           JMWyZWr    TWVVVVW&,
++++++  d7qk|0  Xppppp      ^HMN,    _.db  WMm,   .MMF  MM|   ..MM` JMF      . |yk       .WV&.   .XW'  yy   4yn.  jyn      +.  JM                #S
`++++`  ?ZZZX=  ?WWWW=        -THMMMMH9^    (TMMMMM9!   MMMMMMM""   JMMMMMMMME |UU.        ?TUUUUY=    UU.   (UU-  ^7TUUUV7!   JUUUUUUUU  7TUNKO*/
.com

Compiler output:
a.cc:9:1: error: expected unqualified-id before '.' token
    9 | .com
      | ^
Language: C++

#include<iostream>
using namespace std;

int main(){
 int N;
 int X;
 int cnt = 0;
 
 
 cin >> N;
 cin >> X;
 
 for(int k = 0; k < X; ++k){
  int tmp = k;
  while(1){
    if(tmp%2 != 0){
      tmp = (tmp - 1)/2;
      cnt++;
    }
    else{
      tmp =  tmp/2 + std::pow((double)2, (double)(N-1));
      cnt++;
    }
    if(tmp == k) break;
   }
 }
 

 

 cout << cnt << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:27: error: 'pow' is not a member of 'std'
   21 |       tmp =  tmp/2 + std::pow((double)2, (double)(N-1));
      |                           ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  int n;
  cin >> n;
  string x;
  cin >> x;
  int xx = stoi(str, 0, 2);
  cout << (xx + 1) * n * 2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'str' was not declared in this scope; did you mean 'std'?
    9 |   int xx = stoi(str, 0, 2);
      |                 ^~~
      |                 std
Language: C++

#include <iostream>
#include<vector>
#include <algorithm>
using namespace std;

typedef long long ll;
typedef vector<int> VI;
#define rep(i,n) for(int i=0;i<=(n);++i)

//example rep(i,n) cin >> h[i];

int main (){

int n,k,q;
  
  q=0;
  cin>>n;
 
  cin>>k;

  rep(i,k){
    while(i!=q){
    if(i%2==1){
      q=i;
      q--;
      q=q/2;
    }
    else{
      q=i;
      q=q/2;
      q=q+(2**(n-1));
    }
    }
  }
// cout<<"Hellow worldy yes"<<endl;
 
  k=k*n;
  
  cout<<k<<endl;

  //sort(vec.begin(),vec.end());
  //reverse(vec.begin(),vec.end());

  
 return 0; 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:14: error: invalid type argument of unary '*' (have 'int')
   31 |       q=q+(2**(n-1));
      |              ^~~~~~
Language: C

#include<stdio.h>
int main()
{
int N,X,k,k1,i[k],p,r,w,t,c;
scanf("%d",&N);
scanf("%d",&X);
t=0;  
for(k=1;k<=X;k=k+1)  
{
 i=0;
  for(;;)
  {  
   k1=k; 
   w=k%2;
   r=1; 
   for(p=1;p<=N-1;p=p+1){r=r*2;}
   if(w==0){k=k/2+r;}
   if(w==1){k=(k-1)/2;}
   i=i+1; 
   if(k==k1){break;} 
   if(i>=1000000000000){i=0;break;} 
  }
  t=t+i;
}
c=t%998244353;
printf("%d",c);  
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:3: error: assignment to expression with array type
   10 |  i=0;
      |   ^
main.c:19:5: error: assignment to expression with array type
   19 |    i=i+1;
      |     ^
main.c:21:8: warning: comparison between pointer and integer
   21 |    if(i>=1000000000000){i=0;break;}
      |        ^~
main.c:21:26: error: assignment to expression with array type
   21 |    if(i>=1000000000000){i=0;break;}
      |                          ^
main.c:23:4: error: assignment to 'int' from 'int *' makes integer from pointer without a cast [-Wint-conversion]
   23 |   t=t+i;
      |    ^
Language: C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#define int long long
using namespace std;
typedef long double DB;
const int N = 3e3 + 5;
const DB pi = 3.141592653589793238462;
int read() {
	int x = 0, f = 1; char ch;
	while(! isdigit(ch = getchar())) (ch == '-') && (f = -f);
	for(x = ch ^ 48; isdigit(ch = getchar()); x = (x << 3) + (x << 1) + (ch ^ 48));
	return x * f;
}
template <class T> T Max(T a, T b) { return a > b ? a : b; }
template <class T> T Min(T a, T b) { return a < b ? a : b; }
int n, L;
DB ansx, ansy, t[N];
signed main() {
	n = read(); L = read();
	for(int i = 1; i <= n; ++ i) cin >> t[i];
	for(int i = 1; i <= n; ++ i) {
		for(int j = i + 1; j <= n; ++ j) {
			int cnt = j - i - 1;
			DB tmp = pi * (t[i] + t[j]) / L;
			ansx += cos(tmp) * (n - 2 * cnt - 2);
			ansy += sin(tmp) * (n - 2 * cnt - 2);
		}
	}
	ansx = ansx / (n * (n - 1) * (n - 2) / 6);
	ansy = ansy / (n * (n - 1) * (n - 2) / 6);
	printf("%.12Lf %.12Lf\n", ansx, ansy);
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:33: error: 'cos' was not declared in this scope
   27 |                         ansx += cos(tmp) * (n - 2 * cnt - 2);
      |                                 ^~~
a.cc:28:33: error: 'sin' was not declared in this scope; did you mean 'Min'?
   28 |                         ansy += sin(tmp) * (n - 2 * cnt - 2);
      |                                 ^~~
      |                                 Min
Language: C++

int main(){
  int N, L;
  cin >> N >> L;
  vector<int> T(N);
  for (int i=0;i<N;i++){
    cin >> T.at(i);
  }
  /*vector<vector<double>> Alterc(N, vector<double>(N));
  vector<vector<double>> Alters(N, vector<double>(N));
  for (int i=0;i<N;i++){
    for (int j=0;j<N;j++){
      Alterc.at(i).at(j) = cos(pi*(T.at(i) + T.at(j))/L);
      Alters.at(i).at(j) = sin(pi*(T.at(i) + T.at(j))/L);
    }
  }*/
  double x = 0, y = 0;
  for (int i=0;i<N-2;i++){
    for (int j=i+1;j<N-1;j++){
      x += (N-j-1)*cos(pi*(T.at(i) + T.at(j))/L);
      x += (i+1)*cos(pi*(T.at(i+1) + T.at(j+1))/L);
      x -= (j-i)*cos(pi*(T.at(i) + T.at(j+1))/L);
      y += (N-j-1)*sin(pi*(T.at(i) + T.at(j))/L);
      y += (i+1)*sin(pi*(T.at(i+1) + T.at(j+1))/L);
      y -= (j-i)*sin(pi*(T.at(i) + T.at(j+1))/L);
    }
  }
  x *= 6.0;
  x /= N * (N - 1) * (N - 2);
  y *= 6.0;
  y /= N * (N - 1) * (N - 2);
  printf("%.18lf %.18lf\n", x, y);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> N >> L;
      |   ^~~
a.cc:4:3: error: 'vector' was not declared in this scope
    4 |   vector<int> T(N);
      |   ^~~~~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> T(N);
      |          ^~~
a.cc:6:12: error: 'T' was not declared in this scope
    6 |     cin >> T.at(i);
      |            ^
a.cc:19:24: error: 'pi' was not declared in this scope; did you mean 'i'?
   19 |       x += (N-j-1)*cos(pi*(T.at(i) + T.at(j))/L);
      |                        ^~
      |                        i
a.cc:19:28: error: 'T' was not declared in this scope
   19 |       x += (N-j-1)*cos(pi*(T.at(i) + T.at(j))/L);
      |                            ^
a.cc:19:20: error: 'cos' was not declared in this scope; did you mean 'const'?
   19 |       x += (N-j-1)*cos(pi*(T.at(i) + T.at(j))/L);
      |                    ^~~
      |                    const
a.cc:22:20: error: 'sin' was not declared in this scope
   22 |       y += (N-j-1)*sin(pi*(T.at(i) + T.at(j))/L);
      |                    ^~~
a.cc:31:3: error: 'printf' was not declared in this scope
   31 |   printf("%.18lf %.18lf\n", x, y);
      |   ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | int main(){
Language: C++

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define REP(i,n) for(int i=0;i<n;i++)
#define REPP(i,n) for(int i=1;i<=n;i++)
#define ALL(obj) (obj).begin(), (obj).end()
#define EPS (1e-9)
#define INF (1e17)
#define PI (acos(-1))
//const double PI = acos(-1);
//const double EPS = 1e-15;
//long long INF=(long long)1E17;
#define i_7 (long long)(1e9+7)
//#define i_7 998'244'353
long mod(long a){
    long long c=a%i_7;
    if(c>=0)return c;
    return c+i_7;
}
using namespace std;

bool prime_(int n){
  if(n==1){
    return false;
  }else if(n==2){
    return true;
  }else{
    for(int i=2;i<=sqrt(n);i++){
      if(n%i==0){
        return false;
      }
    }
    return true;
  }
}

long long gcd_(long long a, long long b){
  if(a<b){
    swap(a,b);
  }
  if(a%b==0){
    return b;
  }else{
    return gcd_(b,a%b);
  }
}
 
long long lcm_(long long x, long long y){
  return (x/gcd_(x,y))*y;
}

int main(){
  
  long long n;
  double l;
  cin>>n>>l;
  double t[n];
  REP(i,n){
    cin>>t[i];
  }
  
  double x = 0,y = 0;
  long long all_ = n*(n-1)*(n-2)/6LL;
  REP(i,n){
    for(int j = i+1; j<n; j++){
      
      double mnum = j-i-1;
      double pnum = n-2-(j-i-1);
      x -= mnum*cos(PI*(t[i]+t[j])/l);
      //x += mnum*cos(PI*(t[i]+t[j]+l)/l);
      x += pnum*cos(PI*(t[i]+t[j])/l);
      y -= mnum*sin(PI*(t[i]+t[j])/l);
      //y += mnum*sin(PI*(t[i]+t[j]+l)/l);
      y += pnum*sin(PI*(t[i]+t[j])/l);
      
    }
  }
  
  x /= (double)all_;
  y /= (double)all_;
  cout<<fixed<<setprecision(15)<<ansx<<' '<<ansy<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:80:34: error: 'ansx' was not declared in this scope
   80 |   cout<<fixed<<setprecision(15)<<ansx<<' '<<ansy<<endl;
      |                                  ^~~~
a.cc:80:45: error: 'ansy' was not declared in this scope
   80 |   cout<<fixed<<setprecision(15)<<ansx<<' '<<ansy<<endl;
      |                                             ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
	int N, i, j;
	double L;
	scanf("%d%lf", &N, &L);
	vector<double> T(N);
	for(i = 0; i < N; i++){
		scanf("%lf", &T[i]);
	}
	double sumx = 0, sumy = 0;
	double M_PI = acos(-1);
	double ZPi_L = 2 * M_PI / L;
	for(i = 0; i < N; i++){
		for(j = i + 1; j < N; j++){
			double t1 = (T[i] + T[j]) / 2;
			double t2 = t1 + L / 2;
			if(t2 >= L){
				t2 -= L;
			}
			int k1 = j - i - 1;
			int k2 = N - k1 - 2;
			sumx += k1 * cos(t2 * ZPi_L) + k2 * cos(t1 * ZPi_L);
			sumy += k1 * sin(t2 * ZPi_L) + k2 * sin(t1 * ZPi_L);
		}
	}
	double n = ((double)N * (N - 1) * (N - 2)) / 6;
	printf("%.20lf %.20lf\n", sumx / n, sumy / n);
	return 0;
}

Compiler output:
In file included from /usr/include/c++/14/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:114,
                 from a.cc:1:
a.cc: In function 'int main()':
a.cc:13:16: error: expected unqualified-id before numeric constant
   13 |         double M_PI = acos(-1);
      |                ^~~~
Language: C

#include <bits/stdc++.h>
#include <boost/math/constants/constants.hpp>

using real = double;

real pi = boost::math::constants::pi<real>();
::std::size_t t = 1;

template<class RandomAccessIterator1, class RandomAccessIterator2, class RandomAccessIterator3>
RandomAccessIterator1 convolution(RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, RandomAccessIterator2 last2, RandomAccessIterator3 result){
    using value_type = typename ::std::iterator_traits<RandomAccessIterator1>::value_type;
    using size_type = ::std::size_t;
    size_type N = last1 - first1, M = last2 - first2;
    while(t < N + M)t <<= 1;

    const auto fft_inline = [](auto& res, value_type hint){
        ::std::size_t N = res.size();

        // bit reverse
        for(::std::size_t i = 0, j = 0; i < N; ++i){
            if(i < j)::std::swap(res[i], res[j]);
            j ^= N / (1 + (i ^ (i + 1))) * (i ^ (i + 1));
        }

        ::std::stack<value_type> root;
        root.push(hint);
        for(::std::size_t i = 2; i < N; i <<= 1)root.push(hint *= hint);

        // fft
        for(::std::size_t i = 1; i < N; i <<= 1){
            auto t = root.top();
            root.pop();
            for(::std::size_t j = 0; j < N; j += 2 * i){
                auto coef = static_cast<value_type>(1);
                for(::std::size_t k = 0; k < i; ++k){
                    auto tmp = res[j + k];
                    res[j + k] += coef * res[j + k + i];
                    res[j + k + i] = tmp - coef * res[j + k + i];
                    coef *= t;
                }
            }
        }
    };

    ::std::vector<value_type> input1(first1, last1), input2(first2, last2), res(t);
    input1.resize(t);
    input2.resize(t);
    value_type hint = value_type(::std::cos(pi / (t / 2)), ::std::sin(pi / (t / 2))), ihint = value_type(::std::cos(pi / (t / 2)), -::std::sin(pi / (t / 2)));
    fft_inline(input1, hint);
    fft_inline(input2, hint);
    ::std::transform(input1.begin(), input1.end(), input2.begin(), res.begin(), ::std::multiplies<value_type>());
    fft_inline(res, ihint);

    return ::std::copy(res.begin(), res.end(), result);
}

int main(){
    using real = double;
    using namespace std;
    unsigned long N, L;
    cin >> N >> L;
    vector<unsigned long> T(N);
    copy_n(istream_iterator<unsigned long>(cin), N, T.begin());
    vector<complex<real>> ps(N), res(4 * N);
    transform(T.begin(), T.end(), ps.begin(), [&L](auto t){return complex<real>(cos(pi * t / L), sin(pi * t / L));});
    convolution(ps.begin(), ps.end(), ps.rbegin(), ps.rend(), res.begin());
    complex<real> x{0};
    for(long i = 0, c = -N; i + 1 < N; ++i)x += res[i] * static_cast<real>(c += 2);
    t *= N * (N - 1) * (N - 2) / 6;
    x /= t;
    cout << setprecision(15) << fixed;
    cout << x.real() << " " << x.imag() << endl;
    return 0;
}

Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iomanip>
#include <iostream>
#include <math.h>
using namespace std;
const int N=3e3+10;
const long double pi=acosl(-1);
int main(){
	int n;
  int tot;
	long double x=0,y=0,l,t[N],pos;
	cin>>n>>l;
	for(int i=1;i<=n;i++)cin>>t[i];
	for(int i=1;i<=n;i++)for(int j=i+1;j<=n;j++){
		pos=(t[i]+t[j])*pi/l;
		x+=cos(pos)*(n-j-j+i+i);
		y+=sin(pos)*(n-j-j+i+i);
	}
	tot=((((n*(n-1))/2)*(n-2))/3;
	cout<<fixed<<setprecision(20)<<x/tot<<' '<<fixed<<setprecision(20)<<y/tot<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:37: error: expected ')' before ';' token
   18 |         tot=((((n*(n-1))/2)*(n-2))/3;
      |             ~                       ^
      |                                     )
Language: C++

#include <stdio.h>
#include <math.h>
const int N=3e3+10;
const long double pi=acos(-1);
int main(){
	int n,tot,a[N],pos,l;
	long double x=0,y=0;
  	scanf("%d%d",&n,&l);
	for(int i=1;i<=n;i++)scanf("%d",&a[i]);
	for(int i=1;i<=n;i++)for(int j=i+1;j<=n;j++){
		long double theta=(a[i]+a[j])*pi/l;
		x+=cos(theta)*(n-j+i-2-j+i);
		y+=sin(theta)*(n-j+i-2-j+i);
	}
	tot=(((n*(n-1))/2)*(n-2))/3;
	cout<<fixed<<setprecision(20)<<x/tot<<' '<<fixed<<setprecision(20)<<y/tot<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:9: error: 'cout' was not declared in this scope
   16 |         cout<<fixed<<setprecision(20)<<x/tot<<' '<<fixed<<setprecision(20)<<y/tot<<endl;
      |         ^~~~
a.cc:16:15: error: 'fixed' was not declared in this scope
   16 |         cout<<fixed<<setprecision(20)<<x/tot<<' '<<fixed<<setprecision(20)<<y/tot<<endl;
      |               ^~~~~
a.cc:16:22: error: 'setprecision' was not declared in this scope
   16 |         cout<<fixed<<setprecision(20)<<x/tot<<' '<<fixed<<setprecision(20)<<y/tot<<endl;
      |                      ^~~~~~~~~~~~
a.cc:16:84: error: 'endl' was not declared in this scope
   16 |         cout<<fixed<<setprecision(20)<<x/tot<<' '<<fixed<<setprecision(20)<<y/tot<<endl;
      |                                                                                    ^~~~
Language: C++

#include <bits/stdc++.h>


using namespace std;


using ll = long long;

const double pi = 3.14159265358979323846;


mt19937 mt(736);


struct mpnt
{
	double x, y;

	mpnt(double x = 0, double y = 0) : x(x), y(y)
	{}

	mpnt operator+(const mpnt &o) const
	{
		return {x + o.x, y + o.y};
	}

	mpnt operator-(const mpnt &o) const
	{
		return {x - o.x, y - o.y};
	}

	mpnt operator*(double t) const
	{
		return {x * t, y * t};
	}

	mpnt operator/(double t) const
	{
		return {x / t, y / t};
	}
};


double len(const mpnt &a)
{
	return sqrt(a.x * a.x + a.y * a.y);
}


void solve(istream &cin = std::cin, ostream &cout = std::cout)
{
	int n, l;

	cin >> n >> l;

	vector<complex<double>> pnt(n);

	for (auto &it : pnt)
	{
		int t;

		cin >> t;

		auto ang = 2 * pi * t / l;

		it = {cos(ang), sin(ang)};
	}

	mpnt ans;

	vector<vector<double>> dist(n, vector<double>(n));

	for (int i = 0; i < pnt.size(); i++)
		for (int j = i + 1; j < pnt.size(); j++)
			dist[i][j] = len(pnt[i] - pnt[j]);

	for (int i = 0; i < pnt.size(); i++)
		for (int j = i + 1; j < pnt.size(); j++)
			for (int k = j + 1; k < pnt.size(); k++)
			{
				auto &A = pnt[i];
				auto &B = pnt[j];
				auto &C = pnt[k];

				auto a = dist[j][k];
				auto b = dist[i][k];
				auto c = dist[i][j];

				ans += (a * A + b * B + c * C) / (a + b + c);
			}

	auto C3 = [](int n) {
		return n * (n - 1ll) * (n - 2ll) / 6;
	};

	ans = ans / C3(pnt.size());

	cout << setprecision(20) << ans.x << ' ' << ans.y << endl;
}


int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	cout << fixed;

#ifdef LOCAL
	auto st = clock();

	ifstream fin("../input.txt");

	solve(fin);

	cout << "clock: " << setprecision(4) << (clock() - st) / (double) CLOCKS_PER_SEC << endl;
#else
	solve();
#endif

	return 0;
}


Compiler output:
a.cc: In function 'void solve(std::istream&, std::ostream&)':
a.cc:75:49: error: invalid initialization of reference of type 'const mpnt&' from expression of type 'std::complex<double>'
   75 |                         dist[i][j] = len(pnt[i] - pnt[j]);
a.cc:44:24: note: in passing argument 1 of 'double len(const mpnt&)'
   44 | double len(const mpnt &a)
      |            ~~~~~~~~~~~~^
a.cc:89:37: error: no match for 'operator+=' (operand types are 'mpnt' and 'std::complex<double>')
   89 |                                 ans += (a * A + b * B + c * C) / (a + b + c);
      |                                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include <string>
#include <algorithm>
#include <iostream>
#include <vector>
#include <cstdio>
#include <cstring>
#include <sstream>
#include <cmath>
#include <cassert>
#include <queue>
#include <bitset>
#include <map>
#include <set>

#define pb push_back
#define mp make_pair
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(),(v).end()

using namespace std;

typedef long long int64;
typedef pair<int, int> ii;
typedef vector<int> vi;

typedef double D;
constexpr int maxn = 3010;

D X[maxn], Y[maxn];
D A[maxn];
D d[maxn][maxn];
//D den[maxn];

int main() {
  int n, l;
  cin >> n >> l;
  //n = 3000;
  //l = 1000000000;
  for (int i = 0; i < n; ++i) {
    //int t;
    cin >> t;
    t = 1000000000 / (n - i) - 1;
    D alpha = 2.0 * M_PI * t / l;
    A[i] = alpha;
    X[i] = cos(alpha);
    Y[i] = sin(alpha);
  }
  for (int i = 0; i < n; ++i)
    for (int j = 0; j < n; ++j)
      d[i][j] = hypot((double) (X[i] - X[j]), (double) (Y[i] - Y[j]));
  D sx = 0, sy = 0;
  for (int i = 0; i < n; ++i)
    for (int j = i + 1; j < n; ++j) {
      //cerr << i << " " << j << "\n";
      D dij = d[i][j];
      //D xi = X[i], xj = X[j];
      //D yi = Y[i], yj = Y[j];
      //for (int k = 0; k < n; ++k)
      //  den[k] = dij / (dij + d[i][k] + d[j][k]);
      D* di = d[i];
      D* dj = d[j];
      for (int k = 0; k < n; ++k) {
        D den = dij / (dij + di[k] + dj[k]);
        sx += X[k] * den;
        sy += Y[k] * den;
      }
      D deni = dij / (dij + di[i] + dj[i]);
      D denj = dij / (dij + di[j] + dj[j]);
      sx -= X[i] * deni; sx -= X[j] * denj;
      sy -= Y[i] * deni; sy -= Y[j] * denj;
//      for (int k = j + 1; k < n; ++k) {
//        //cerr << k << "\n";
//        D dik = d[i][k], djk = d[j][k], xkk = X[k], ykk = Y[k];
//        D s = dij + dik + djk;
//        sx += xi * djk / s + xj * dik / s + xkk * dij / s;
//        sy += yi * djk / s + yj * dik / s + ykk * dij / s;
//      }
    }
  D den = (D)n * D(n - 1) * D(n - 2) / 6.0;
  sx /= den;
  sy /= den;
  printf("%.20f %.20f\n", sx, sy);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:45:12: error: 't' was not declared in this scope
   45 |     cin >> t;
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

pair<double, double> inner_center(double Ax, double Ay, double Bx, double By, double Cx, double Cy){
	double a = hypot(Bx - Cx, By - Cy), b = hypot(Cx - Ax, Cy - Ay), c = hypot(Ax - Bx, Ay - By);
	double atbtc = a + b + c;
	return pair<double, double>((a * Ax + b * Bx + c * Cx) / atbtc, (a * Ay + b * By + c * Cy) / atbtc);
}

int main(){
	int N, i, j, k;
	double L;
	scanf("%d%lf", &N, &L);
	vector<double> T(N);
	for(i = 0; i < N; i++){
		scanf("%lf", &T[i]);
	}
	double M_PI = acos(-1);
	double ZPi_L = 2 * M_PI / L;
	double sumx = 0, sumy = 0;
	int count = 0;
	for(i = 0; i < N; i++){
		for(j = i + 1; j < N; j++){
			for(k = j + 1; k < N; k++){
				count++;
				sumx += inner_center(cos(ZPi_L * T[i]), sin(ZPi_L * T[i]), cos(ZPi_L * T[j]), sin(ZPi_L * T[j]), cos(ZPi_L * T[k]), sin(ZPi_L * T[k])).first;
				sumy += inner_center(cos(ZPi_L * T[i]), sin(ZPi_L * T[i]), cos(ZPi_L * T[j]), sin(ZPi_L * T[j]), cos(ZPi_L * T[k]), sin(ZPi_L * T[k])).second;
			}
		}
	}
	printf("%.10lf %10lf\n", sumx / count, sumy / count);
	return 0;
}

Compiler output:
In file included from /usr/include/c++/14/cmath:47,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:114,
                 from a.cc:1:
a.cc: In function 'int main()':
a.cc:18:16: error: expected unqualified-id before numeric constant
   18 |         double M_PI = acos(-1);
      |                ^~~~
Language: C

#include<stdio.h>
#include<math.h>

int main(void) {
 unsigned long long int i, sumx = 0, sumy = 0;
 unsigned long long int x[1000000000]
 unsigned long long int y[1000000000];
	unsigned long long int N, L;
	unsigned long long int T[1000000000];

	scanf("%lld %lld", &N, &L);

	for(i = 0;i < N;i++) {
		scanf("%lld", T);
			x[i] = sin(2*3.14159*T[i]/L); sumx = sumx + x[i]
				y[i] = cos(2*3.14159*T[i]/L); sumy = sumy + y[i]
	}

	sumx = sumx / N;	sumy = sumy / N;

	printf("%llf %llf", (long long double) sumx, (long long double) sumy);
 return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:38: error: expected ';' before 'unsigned'
    6 |  unsigned long long int x[1000000000]
      |                                      ^
      |                                      ;
    7 |  unsigned long long int y[1000000000];
      |  ~~~~~~~~                             
main.c:15:25: error: 'x' undeclared (first use in this function)
   15 |                         x[i] = sin(2*3.14159*T[i]/L); sumx = sumx + x[i]
      |                         ^
main.c:15:25: note: each undeclared identifier is reported only once for each function it appears in
main.c:15:73: error: expected ';' before 'y'
   15 |                         x[i] = sin(2*3.14159*T[i]/L); sumx = sumx + x[i]
      |                                                                         ^
      |                                                                         ;
   16 |                                 y[i] = cos(2*3.14159*T[i]/L); sumy = sumy + y[i]
      |                                 ~                                        
main.c:16:81: error: expected ';' before '}' token
   16 |                                 y[i] = cos(2*3.14159*T[i]/L); sumy = sumy + y[i]
      |                                                                                 ^
      |                                                                                 ;
   17 |         }
      |         ~                                                                        
main.c:21:40: error: both 'long long' and 'double' in declaration specifiers
   21 |         printf("%llf %llf", (long long double) sumx, (long long double) sumy);
      |                                        ^~~~~~
main.c:21:65: error: both 'long long' and 'double' in declaration specifiers
   21 |         printf("%llf %llf", (long long double) sumx, (long long double) sumy);
      |                                                                 ^~~~~~
Language: C++

#include<iostream>
#include<cstdio>
using namespace std;
const int N=25;
int n;
int a[N][N];
long long dp[N][N][N];
long long dfs(int l,int mid,int r)
{
	if(dp[l][mid][r]!=-1) return dp[l][mid][r];
	if(l==r) return 1;
	if(l==mid||mid==r) return 0;
	long long res=0;
	for(int j=l;j<mid;j++)
		for(int k=mid+1;k<=r;k++)
			if(a[j][k])
				for(int p=j;p<mid;p++)
					for(int q=mid+1;q<=k;q++)
						res+=dfs(l,j,p)*dfs(p+1,mid,q-1)*dfs(q,k,r);
	return dp[l][mid][r]=res;
}
int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n*2;i++)
		for(int j=1;j<=n*2;j++)
			scanf("%1d",&a[i][j]);
	memset(dp,-1,sizeof(dp));
	long long ans=0;
	for(int i=2;i<=n*2;i++)
		if(a[1][i]) ans+=dfs(2,i,2*n);
	printf("%lld",ans);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:9: error: 'memset' was not declared in this scope
   28 |         memset(dp,-1,sizeof(dp));
      |         ^~~~~~
a.cc:3:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include<cstdio>
  +++ |+#include <cstring>
    3 | using namespace std;
Language: C++

#include<bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define uint unsigned
#define pii pair<int,int>
#define pll pair<ll,ll>
#define PB push_back
#define fi first
#define se second
#define For(i,j,k) for (int i=(int)(j);i<=(int)(k);i++)
#define Rep(i,j,k) for (int i=(int)(j);i>=(int)(k);i--)
#define CLR(a,v) memset(a,v,sizeof(a));
#define CPY(a,b) memcpy(a,b,sizeof(a));
using namespace std;
const int N=45;
int n;
char e[N][N];
ll f[N][N][N];
ll g[N][N][N];
ll S[N];
int main(){
	scanf("%d",&n); n*=2;
	For(i,1,n) scanf("%s",e[i]+1);
	For(i,1,n) For(j,1,n) e[i][j]-='0';
	For(i,1,n) f[i][i][i]=1;
	For(i,1,n) For(j,1,n) if (e[i][j]) g[i][i][j]=1;
	for (int l=3;l<=n;l+=2)
		for (int i=2,j=l+1;j<=n;i++,j++){
			for (int p1=i;p1<r;p1+=2)
				for (int p2=j;p2>p1;p2-=2){
					ll S=0;
					for (int p3=p2;p3<=j;p3++)
						S+=f[p2][j][p3]*g[i][p1][p3];
					for (int p3=p1+1;p3<p2;p3++)
						f[i][j][p3]+=f[p1+1][p2-1][p3]*S;
				}
			For(k,i,j) For(l,1,n) if (e[k][l])
				g[i][j][l]+=f[i][j][k];
		}
	ll ans=0;
	For(i,2,n) if (e[1][i])
		ans+=f[2][n][i];
	printf("%lld\n",ans);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:42: error: 'r' was not declared in this scope
   29 |                         for (int p1=i;p1<r;p1+=2)
      |                                          ^
Language: C++

#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> P1;
typedef pair<P,P> P2;
#define pu push
#define pb push_back
#define mp make_pair
#define eps 1e-7
#define INF 1000000000
#define fi first
#define sc second
#define rep(i,x) for(int i=0;i<x;i++)
#define repn(i,x) for(int i=1;i<=x;i++)
#define SORT(x) sort(x.begin(),x.end())
#define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end())
#define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())

ll dp[45][45][45];
int n,a[45][45];

ll rec(int l,int r,int x){
	if(l > r || (l == x && r == x)) return 1;
	if(l == x || r == x) return 0;
	if(dp[l][r][x] >= 0) return dp[l][r][x] ;
	ll ret = 0;
	for(int i=l;i<x;i++){
		for(int j=x+1;j<=r;j++){
			if(a[i][j] == 0) continue;
			for(int ii=i;ii<x;ii++){
				for(int jj=x+1;jj<=j;jj++){
					ret += rec(l,ii,i) * rec(ii+1,jj-1,x) * rec(jj,r,j);
				}
			}
		}
	}
	return dp[l][r][x] = ret;
}
int main(){
	cin >> n;
	rep(i,2*n){
		string s; cin >> s;
		rep(j,2*n){
			a[i][j] = s[j]-'0';
		}
	}
	memset(dp,-1,sizeof(dp));
	ll ans = 0;
	for(int i=1;i<2*n;i++){
	    if(a[0][i] == 0) continue;
		ans += rec(1,2*n-1,i);
	}
	cout << ans << endl;
}

Compiler output:
In file included from /usr/include/c++/14/string:43,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:4:
/usr/include/c++/14/bits/allocator.h: In destructor 'std::__cxx11::basic_string<char>::_Alloc_hider::~_Alloc_hider()':
/usr/include/c++/14/bits/allocator.h:182:7: error: inlining failed in call to 'always_inline' 'std::allocator< <template-parameter-1-1> >::~allocator() noexcept [with _Tp = char]': target specific option mismatch
  182 |       ~allocator() _GLIBCXX_NOTHROW { }
      |       ^
In file included from /usr/include/c++/14/string:54:
/usr/include/c++/14/bits/basic_string.h:186:14: note: called from here
  186 |       struct _Alloc_hider : allocator_type // TODO check __is_final
      |              ^~~~~~~~~~~~
Language: C++

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
   float x,y;
   int n;
   cin>>n;
   if(n%2==0)
    {
        x=2/n;
   cout<<fixed<<setprecision(10)<<x<<endl;
    }
    else
       {
           y=((n+1)/2);
           y=y/n;

    cout<<fixed<<setprecision(10)<<y<<endl;
       }

Compiler output:
a.cc: In function 'int main()':
a.cc:20:9: error: expected '}' at end of input
   20 |        }
      |         ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^
Language: C++

#include<iostream>
#include<iomanip>
using namespace std;
main()
{
   float x,y;
   int n;
   cin>>n;
   if(n%2==0)
    {
        x=2/n;
   cout<<fixed<<setprecision(10)<<x<<endl;
    }
    else
       {
           y=((n+1)/2);
           y=y/n;

    cout<<fixed<<setprecision(10)<<y<<endl;
       }

Compiler output:
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:20:9: error: expected '}' at end of input
   20 |        }
      |         ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^
Language: C++

#include <iostream>
using namespace std;
int main (){
int n;odd;
cin >> n;
odd = (n+1) / 2;
printf ("%.10f\n", (double)odd/(double)n);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:7: error: 'odd' was not declared in this scope
    4 | int n;odd;
      |       ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using P = pair<int, int>;
#define LARGE 1000000007

int main() {
    int n;
    cin >> n;

    double a = (n / 2) + (n % 2);
    double p = a / n;
    cout << fixed << setprecision(15) << p << endl;

	return 0;
}

Compiler output:
a.cc:3:10: fatal error: atcoder/all: No such file or directory
    3 | #include <atcoder/all>
      |          ^~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
using namespace std;
int main()
{
  double n;
  cin>>n;
  if(n%2==0){
    cout<<"0.5000000000";
  }
  else{
      double v=n/2;
      double x=v+0.5;
      double y=x/n;
      cout<<y;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    7 |   if(n%2==0){
      |      ~^~
      |      | |
      |      | int
      |      double
Language: C++

#include <algorithm>
#include <cassert>
#include <cmath>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
using namespace std;
typedef long long ll;

#define rep(i, n) for(ll i = 0; i < n; i++)
#define REP(i, n) for(ll i = 1; i < n + 1; i++)
#define PI 3.14159265359
#define EPS 0.0000000001
#define MOD 1000000007
//cout << std::fixed << std::setprecision(15) << y << endl;


int main(){
    ll N;
    cin >> N;

    double ans;
    if(a % 2 == 0){
        cout << std::fixed << std::setprecision(15) << 0.5 << endl;
    }else{
        cout << std::fixed << std::setprecision(15) << (double)((N - 1) / 2) / (double)N << endl;
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:8: error: 'a' was not declared in this scope
   30 |     if(a % 2 == 0){
      |        ^
Language: C

#include<stdio.h>

int main(void){
  int a;
  scanf("%d",&a);
  int b=(a+1)/2;
  double c=(double)b/a
  printf("%f\n",c);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:8:3: error: expected ',' or ';' before 'printf'
    8 |   printf("%f\n",c);
      |   ^~~~~~
Language: C++

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
#define rep(i,n) for(int i=0;i<(n);++i)
#define repi(i,a,b) for(int i=int(a);i<int(b);++i)
#define all(x) (x).begin(), (x).end()
#define PI 3.14159265358979323846264338327950L
using namespace std;
typedef long long ll;
typedef long double ld;
int main() {
    int N;
    cin >> N;
    cout.precision(10);
    cout << (double)(N - N / 2) / (double)N << endl;
    return;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   15 |     return;
      |     ^~~~~~
Language: C++

#include <iostream>
#include <math.h>
#include <string>

using namespace std;
int main()
{
    float sum,a =0,n;
    cin>>n;
    for(int i =1; i<= n; i++){
        if((i+1)%2 == 0){
            a++;
        }
    }
    sum = a/n;
    cout<<sum;

    return 0;


Compiler output:
a.cc: In function 'int main()':
a.cc:18:14: error: expected '}' at end of input
   18 |     return 0;
      |              ^
a.cc:7:1: note: to match this '{'
    7 | {
      | ^
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <iomanip>
#include <vector>
#include <string.h>
#include <math.h>
#include <algorithm>
#include <map>
#include <queue>
#include <climits>
#define rep(i,n) for (int i=0;i<(n);i++)

using namespace std;

int main() {
    double n;
    cin >>n;
    double ans;
    if((int)n % 2.0 == 1){
        ans  = n / (n / 2 + 1);
    }
    else{
        ans = n / (n / 2);
    }
    cout << ans << endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:15: error: invalid operands of types 'int' and 'double' to binary 'operator%'
   20 |     if((int)n % 2.0 == 1){
      |        ~~~~~~ ^ ~~~
      |        |        |
      |        int      double
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <iomanip>
#include <vector>
#include <string.h>
#include <math.h>
#include <algorithm>
#include <map>
#include <queue>
#include <climits>
#define rep(i,n) for (int i=0;i<(n);i++)

using namespace std;

int main() {
    double n;
    cin >>n;
    double ans;
    if(n % 2.0 == 1){
        ans  = n / (n / 2 + 1);
    }
    else{
        ans = n / (n / 2);
    }
    cout << ans << endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:10: error: invalid operands of types 'double' and 'double' to binary 'operator%'
   20 |     if(n % 2.0 == 1){
      |        ~ ^ ~~~
      |        |   |
      |        |   double
      |        double
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <iomanip>
#include <vector>
#include <string.h>
#include <math.h>
#include <algorithm>
#include <map>
#include <queue>
#include <climits>
#define rep(i,n) for (int i=0;i<(n);i++)

using namespace std;

int main() {
    double n;
    cin >>n;
    double ans;
    if(n%2.0){
        ans  = n / (n / 2 + 1);
    }
    else{
        ans = n / (n / 2);
    }
    cout << ans << endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:9: error: invalid operands of types 'double' and 'double' to binary 'operator%'
   20 |     if(n%2.0){
      |        ~^~~~
      |        | |
      |        | double
      |        double
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <iomanip>
#include <vector>
#include <string.h>
#include <math.h>
#include <algorithm>
#include <map>
#include <queue>
#include <climits>
#define rep(i,n) for (int i=0;i<(n);i++)

using namespace std;

int main() {
    double n;
    cin >>n;
    double ans;
    if(n%2){
        ans  = n / (n / 2 + 1);
    }
    else{
        ans = n / (n / 2);
    }
    cout << ans << endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:9: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   20 |     if(n%2){
      |        ~^~
      |        | |
      |        | int
      |        double
Language: C

#include <stdio.h>
int main(void)
{
  int N;
  scanf ("%d",&N);
  double M;
  M=(double) N;
  if (N%2==0) printf ("%f",1/2);
  else printf ("%f",(((M-1)/2)+1)/M);

Compiler output:
main.c: In function 'main':
main.c:9:3: error: expected declaration or statement at end of input
    9 |   else printf ("%f",(((M-1)/2)+1)/M);
      |   ^~~~
Language: C++

#include <iostream>
using namespace std;
int main(){
  
  int a;
  cin>>a;
  
  double b;
  
  if(a%2!=0){
    b=((double)a+1)/2)/(double)a;
  }
  else{
    b=((double)a/2)/(double)a;
  }
  
  cout<<b;
  
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:22: error: expected ';' before ')' token
   11 |     b=((double)a+1)/2)/(double)a;
      |                      ^
      |                      ;
Language: C++

#include <iostream>
using namespace std;
int main(){
  
  int a;
  cin>>a;
  
  double b;
  
  if(a%2!=0){
    b=((double)a+1))/2)/(double)a;
  }
  else{
    b=((double)a/2)/(double)a;
  }
  
  cout<<b;
  
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:20: error: expected ';' before ')' token
   11 |     b=((double)a+1))/2)/(double)a;
      |                    ^
      |                    ;
Language: C++

#include <iostream>
using namespace std;
int main(){
  
  int a;
  cin>>a;
  
  if(a%2!=0){
    b=((double a+1)/2)/double a;
  }
  else{
    b=(double a/2)/double a;
  }
  
  cout<<b;
  
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'b' was not declared in this scope
    9 |     b=((double a+1)/2)/double a;
      |     ^
a.cc:9:9: error: expected primary-expression before 'double'
    9 |     b=((double a+1)/2)/double a;
      |         ^~~~~~
a.cc:9:9: error: expected ')' before 'double'
    9 |     b=((double a+1)/2)/double a;
      |        ~^~~~~~
      |         )
a.cc:9:32: error: expected ')' before ';' token
    9 |     b=((double a+1)/2)/double a;
      |       ~                        ^
      |                                )
a.cc:12:5: error: 'b' was not declared in this scope
   12 |     b=(double a/2)/double a;
      |     ^
a.cc:12:8: error: expected primary-expression before 'double'
   12 |     b=(double a/2)/double a;
      |        ^~~~~~
a.cc:12:8: error: expected ')' before 'double'
   12 |     b=(double a/2)/double a;
      |       ~^~~~~~
      |        )
a.cc:15:9: error: 'b' was not declared in this scope
   15 |   cout<<b;
      |         ^
Language: C++

#include <iostream>
using namespace std;
int main(){
  
  int a;
  cin>>a;
  
  double a;
  
  double b;
  
  if(a%2!=0){
    b=((a+1)/2)/a;
  }
  else{
    b=(a/2)/a;
  }
  
  cout<<b;
  
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: conflicting declaration 'double a'
    8 |   double a;
      |          ^
a.cc:5:7: note: previous declaration as 'int a'
    5 |   int a;
      |       ^
Language: C++

int gcd(int a, int b)
{
   if (a%b == 0)　{
       return(b);
   }
   else　{
       return(gcd(b, a%b));
   }
}

int lcm(int a, int b)　{
   return a * b / gcd(a, b);
}

Compiler output:
a.cc:3:17: error: extended character 　 is not valid in an identifier
    3 |    if (a%b == 0)　{
      |                 ^
a.cc:6:4: error: extended character 　 is not valid in an identifier
    6 |    else　{
      |    ^
a.cc:11:22: error: extended character 　 is not valid in an identifier
   11 | int lcm(int a, int b)　{
      |                      ^
a.cc: In function 'int gcd(int, int)':
a.cc:3:17: error: '\U00003000' was not declared in this scope
    3 |    if (a%b == 0)　{
      |                 ^~
a.cc:6:4: error: 'else\U00003000' was not declared in this scope
    6 |    else　{
      |    ^~~~~~
a.cc:9:1: warning: no return statement in function returning non-void [-Wreturn-type]
    9 | }
      | ^
a.cc: At global scope:
a.cc:11:22: error: expected initializer before '\U00003000'
   11 | int lcm(int a, int b)　{
      |                      ^~
Language: C++

long long gcd(long long a, long long b) {
  if (a%b == 0) {
    return(b);
  }
  else return(gcd(b, a%b));
}
  

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
double n;
  cin>>n;
  cout<<fixed<<setprecision(7);
  if(n==1){cout<<"1.000000"<<endl;}
  else if(n%2.0==0){cout<<1/2<<endl;}
  else{cout<<(n+1)/2/n<<endl;}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: invalid operands of types 'double' and 'double' to binary 'operator%'
    8 |   else if(n%2.0==0){cout<<1/2<<endl;}
      |           ~^~~~
      |           | |
      |           | double
      |           double
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
double n;
  cin>>n;
  cout<<fixed<<setprecision(7);
  if(n==1){cout<<"1.000000"<<endl;}
  else if(n%2==0){cout<<1/2<<endl;}
  else{cout<<(n+1)/2/n<<endl;}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    8 |   else if(n%2==0){cout<<1/2<<endl;}
      |           ~^~
      |           | |
      |           | int
      |           double
Language: C

#include<bits/stdc++.h>
using namespace std;
double total_odd_number(int n)
{
    if(n%2==0) return n/2;
    else return (n/2)+1;
}
int main(void)
{
    double n;
    cin>>n;
    double s = total_odd_number(n);
    cout<<fixed<<setprecision(10)<<s/n<<endl;

    return 0;
}


Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: Java

import java.util.Scanner;

public class A{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        if(N % 2 == 0){
            System.out.println(0.5);
        }else{
            System.out.println((double) (N + 1) / 2 / N);
        }

    }
}


Compiler output:
Main.java:3: error: class A is public, should be declared in a file named A.java
public class A{
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int n;
  cin >> n;

  if (n%2==0)
  double ans = n/2;
  else
  double ans = (n/2+1)/n;
  
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   13 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  double n;
  cin >> n;

  if (n%2==0)
  cout << n/2 << endl;
  else
  cout << (n/2+1)/n << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: invalid operands of types 'double' and 'int' to binary 'operator%'
    8 |   if (n%2==0)
      |       ~^~
      |       | |
      |       | int
      |       double