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

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

const PI = acos(-1);

int main(){
  int a, b, h, m;
  cin >> a >> b >> h >> m;
  
  double th = double(h*60+m)/720 * 2*PI;
  double tm = double(m)/60 * 2*PI;
  double xh = a*cos(th), yh = a*sin(th);
  double xm = b*cos(tm), ym = b*sin(tm);
  double dx = xh-xm, dy=yh-ym;
  double ans = sqrt(dx*dx + dy*dy);
  printf("%.10f\n", ans);

  return 0;
}

Compiler output:
a.cc:5:7: error: 'PI' does not name a type
    5 | const PI = acos(-1);
      |       ^~
a.cc: In function 'int main()':
a.cc:11:38: error: 'PI' was not declared in this scope
   11 |   double th = double(h*60+m)/720 * 2*PI;
      |                                      ^~
Language: C++

# include <bits/stdc++.h>
# define rep(i, n) for(ll i = 0; i < (n); ++i)
# define reps(i, n) for(ll i=1, i##_len=(n); i<=i##_len; ++i)
# define rrep(i, n) for(ll i=((int)(n)-1); i>=0; --i)
# define rreps(i, n) for(ll i=((int)(n)); i>0; --i)
# define ll long long
# define ALL(x) (x).begin(), (x).end()
# define SZ(x) ((int)(x).size())
# define pb push_back
# define optimize_cin() cin.tie(0); ios::sync_with_stdio(false)
# define P pair<int, int>
using namespace std;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
ll lmax(ll a, ll b){if(a>= b) return a;return b;}
ll lmin(ll a, ll b){if(a>= b) return b;return a;}
static const ll INF = 1e18;

int main() {
  double a, b; cin >> a >> b;
  double h, m; cin >> h >> m;

  double ans;
  double angle =M_PI * abs(60 * h - 11 * m) / 360;
  double ans = sqrt(a*a + b * b - 2 * a * b *cos(angle));
  printf("%.12f\n", ans);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:10: error: redeclaration of 'double ans'
   25 |   double ans = sqrt(a*a + b * b - 2 * a * b *cos(angle));
      |          ^~~
a.cc:23:10: note: 'double ans' previously declared here
   23 |   double ans;
      |          ^~~
Language: C++

import math
a, b, h, m = map(int, input().split())
theta = math.pi * abs((h+m/60)/6 - m/30);
val = math.sqrt(a*a + b*b - 2*a*b*math.cos(theta))
print(val)


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:1: error: 'val' does not name a type
    4 | val = math.sqrt(a*a + b*b - 2*a*b*math.cos(theta))
      | ^~~
Language: C

#include<iostream>
#include<cmath>
#include<iomanip>

using namespace std;

int main(){
	long double a,b,h,m;
	cin >> a >> b >> h >> m;
	
	long double hang = h*30 + (m/60)*30;
	long double mang = m*6;
	long double ang = abs(mang - hang);
	long double pi = 3.14159265358979323846;
	long double cosang = cos(ang * pi/180);
	long double res = sqrt(a*a + b*b - 2*a*b*cosang);
	
	cout << fixed << showpoint;
	cout << setprecision(20);
	cout << res << endl;
	
	return 0;
	
	
} 

Compiler output:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#define rep(i,n) for(i=0;i<n;i++)
#define PI 3.14159265358979323846264338327950L
int main(){
    long double a,b,h,m;
    scanf("%llf%llf%llf%llf",&a,&b,&h,&m);
    long double c=abs(h*30+m*0.5-m*6);
    if(c>180) c=360-c;
    c=c*(PI/180);
    long double ans=a*a+b*b-2*a*b*cos(c);
    printf("%f",sqrtl(ans));
    return 0;

Compiler output:
main.c: In function 'main':
main.c:14:5: error: expected declaration or statement at end of input
   14 |     return 0;
      |     ^~~~~~
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#define rep(i,n) for(i=0;i<n;i++)
#define PI 3.14159265358979323846264338327950L
int main(){
    double a,b,h,m;
    scanf("%lf%lf%lf%lf",&a,&b,&h,&m);
    double c=abs(h*30+m*0.5-m*6);
    if(c>180) c=360-c;
    c=c*(PI/180);
    double ans=a*a+b*b-2*a*b*cos(c);
    printf("%f",sqr(ans);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:17: error: implicit declaration of function 'sqr'; did you mean 'sqrt'? [-Wimplicit-function-declaration]
   13 |     printf("%f",sqr(ans);
      |                 ^~~
      |                 sqrt
main.c:13:25: error: expected ')' before ';' token
   13 |     printf("%f",sqr(ans);
      |           ~             ^
      |                         )
main.c:14:14: error: expected ';' before '}' token
   14 |     return 0;
      |              ^
      |              ;
   15 | }
      | ~
Language: C++

#include <iostream>
#include <stdio.h>
#include <math.h>
using namespace std;
#define rep(k, n)	for (int k; k < n; k++)

int main(){

	double a, b, h, m;
	cin >> a >> b >> h >> m;
	h *= 30;
	h += m / 2;
	m *= 6;
	double ans = sqrt(a*a + b*b - 2*a*b*cos(abs(h - m) / 180 * M_PI));
	cout << setprecision(20) << ans << endl;

	return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:15:17: error: 'setprecision' was not declared in this scope
   15 |         cout << setprecision(20) << ans << endl;
      |                 ^~~~~~~~~~~~
a.cc:4:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    3 | #include <math.h>
  +++ |+#include <iomanip>
    4 | using namespace std;
Language: Java

import java.util.*;

public class Main {
	public static void main(String[] args) throws Exception{
		Scanner scn = new Scanner(System.in);
		int a = scn.nextInt();
      int b = scn.nextInt();
      int h = scn.nextInt();
      int m = scn.nextInt();
      double hh = h*30;
      double mm = m*6;
      double x = 0;
      if(hh>mm){
        if(hh-mm>180){
          x = 360 + mm - hh;
        }else{
          x = hh - mm;
        }
      }if(mm>=hh){
        if(mm - hh>180){
          x = 360 + hh -mm;
        }else{
          x = mm - hh;
        }
      }
      double cosx = Math.cos(Math.toRadians(x));
      double ans2 = a*a + b*b - 2*b*c*cosx;
      double ans = Math.sqrt(ans2);
	}
}

Compiler output:
Main.java:27: error: cannot find symbol
      double ans2 = a*a + b*b - 2*b*c*cosx;
                                    ^
  symbol:   variable c
  location: class Main
1 error
Language: C++

#include <bits/stdc++.h> //全てのヘッダファイルをインクルード

//ループ
#define rep(i, n) for(int i = 0; i < (n); i++) //普通のループ
#define repr(i, n) for(int i = n; i >= 0; i--) //逆ループ

//型名省略
typedef long long ll;
//値
static const ll MX = 100005;
static const ll MX_ll = 1e18;
const double PI = acos(-1); //π

using namespace std;

//ソート
#define SIZE_OF_ARRAY(array) (sizeof(array)/sizeof(array[0]))

//#include "./lib/generic/search.h"

int main(){
    int a, b, h, m;
    cin >> a >> b >> h >> m;
    double th = double(h*60+m)/720 * 2*PI;
    double tm = double(m)/60 *2PI;
    double xh = a*cos(th), yh = a*sin(th);
    double xm = b*cos(tm), ym = b*sin(tm);
    double dx = xh-xm, dy = yh-ym;
    double ans = sqrt(dx*dx + dy*dy);
    printf("%.10f\n", ans);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:31: error: unable to find numeric literal operator 'operator""PI'
   25 |     double tm = double(m)/60 *2PI;
      |                               ^~~
Language: C++

#include <bits/stdc++.h> //全てのヘッダファイルをインクルード

//ループ
#define rep(i, n) for(int i = 0; i < (n); i++) //普通のループ
#define repr(i, n) for(int i = n; i >= 0; i--) //逆ループ

//型名省略
typedef long long ll;
//値
static const ll MX = 100005;
static const ll MX_ll = 1e18;
const double PI  acos(-1); //π

using namespace std;

//ソート
#define SIZE_OF_ARRAY(array) (sizeof(array)/sizeof(array[0]))

//#include "./lib/generic/search.h"

int main(){
    int a, b, h, m;
    cin >> a >> b >> h >> m;
    double th = double(h*60+m)/720 * 2*PI;
    double tm = double(m)/60 *2PI;
    double xh = a*cos(th), yh = a*sin(th);
    double xm = b*cos(tm), ym = b*sin(tm);
    double dx = xh-xm, dy = yh-ym;
    double ans = sqrt(dx*dx + dy*dy);
    printf("%.10f\n", ans);
    return 0;
}

Compiler output:
a.cc:12:18: error: expected initializer before 'acos'
   12 | const double PI  acos(-1); //π
      |                  ^~~~
a.cc: In function 'int main()':
a.cc:24:40: error: 'PI' was not declared in this scope
   24 |     double th = double(h*60+m)/720 * 2*PI;
      |                                        ^~
a.cc:25:31: error: unable to find numeric literal operator 'operator""PI'
   25 |     double tm = double(m)/60 *2PI;
      |                               ^~~
Language: C++

import math

pi = math.pi

A,B,H,M = map(int, input().split())

rad = pi * 2 * (( H *60 +M) / (12*60) - M /60 ) 

XX = A*A + B*B -2*A*B* math.cos(rad)

X = math.sqrt(XX)

print(X)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define PI 3.14159265358979323846264338327950L

int main(void)
{   
    long double A,B;
    long double H;
    long double M;

    cin >> A >> B >> H >> M;

    long double hr,mr;

    hr =  (H * (long double)60.0 + M) / (long double)12.0 / (long double)60 * (long double)2 * pi;
    mr = M/(long double)60 * (long double)2*pi;

    long double dr = abs(hr - mr);

    long double XX = A*A + B*B - 2 * A*B * cos(dr);
    long double X = sqrt(XX);

    cout << X << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:96: error: 'pi' was not declared in this scope; did you mean 'PI'?
   15 |     hr =  (H * (long double)60.0 + M) / (long double)12.0 / (long double)60 * (long double)2 * pi;
      |                                                                                                ^~
      |                                                                                                PI
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<n; i++)
typedef long long ll;
using namespace std;
using P = pair<int,int>;
const int INF = 1001001001;

const double PI = acos(-1);

int main(){	
	int a,b,h,m;
	cin >> a >> ab >> h >> m;
	double th = double(h*60+m)720 * 2*PI;
	double tm = double(m)/60 * 2*PI;
	double xh = a*cos(th), yh = a*sin(th);
	double xm = b*cos(tm), ym = b*sin(tm);
	double dx = xh-xm, dy = yh-ym;
	double ans = sqrt(dx*dx + dy*dy);
	print("%.10f\n", ans);
	return 0;

}





Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: 'ab' was not declared in this scope; did you mean 'b'?
   12 |         cin >> a >> ab >> h >> m;
      |                     ^~
      |                     b
a.cc:13:35: error: expected ',' or ';' before numeric constant
   13 |         double th = double(h*60+m)720 * 2*PI;
      |                                   ^~~
a.cc:19:9: error: 'print' was not declared in this scope; did you mean 'rint'?
   19 |         print("%.10f\n", ans);
      |         ^~~~~
      |         rint
Language: C++

#include <bits/stdc++.h>
using namespace std;
PI=3.14159265358979323846;

int main(){
  double A, B, H, M;
  cin>>A>>B>>H>>M;
  
  double a1 = 360*(H*60+M)/(12*60);
  double a2 = 6*M;
  
  // cout<<a1<<' '<<a2<<endl;
  double diff=abs(a1-a2);
  diff = min(diff, 360-diff);
  
  // const double PI = acos(-1);
  double ans_2 = A*A + B*B - 2*A*B*cos(diff*PI/180);
  
  cout<<fixed<<setprecision(20)<<sqrt(ans_2)<<endl;
}

Compiler output:
a.cc:3:1: error: 'PI' does not name a type
    3 | PI=3.14159265358979323846;
      | ^~
a.cc: In function 'int main()':
a.cc:17:45: error: 'PI' was not declared in this scope
   17 |   double ans_2 = A*A + B*B - 2*A*B*cos(diff*PI/180);
      |                                             ^~
Language: C++

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define USE_LLONG_AS_INT
#ifdef USE_LLONG_AS_INT
#define int long long
#define inf (1ll<<60)
#else
#define inf (1<<30)
#endif
#define rep(i,n) for(int i=0;i<(n);i++)
#define Rep(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,a,b) for(int i=(a);i<=(b);i++)
#define rev(i,n) for(int i=(n)-1;i>=0;i--)
#define vi vector<int>
#define vvi vector<vi>
#define vs vector<string>
#define pb push_back
#define eb emplace_back
#define pi pair<int,int>
#define vp vector<pair<int,int>>
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define MEMSET(a) memset(a,0,sizeof(a))
#define Yes(f) cout<<(f?"Yes":"No")<<endl
#define yes(f) cout<<(f?"yes":"no")<<endl
#define YES(f) cout<<(f?"YES":"NO")<<endl
#define SORT(v) sort(all(v))
#define RSORT(v) sort(all(v), greater<int>())

using namespace std;

const int mod=1e9+7;
// const int mod=998244353;
const string sp=" ";

void run();

void init() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout<<fixed<<setprecision(12);
}

signed main(){
    init();
    run();
    return 0;
}

void run(){
    long double a,b,h,m
    cin>>a>>b>>h>>m;
    double c=30*h+m*0.5,d=6*m;
    double e=c-d;
    if(e>180)e-=180;
    cout<<sqrtl(a*a+b*b-2*a*b*cos(e*M_PI/180))<<endl;
}

Compiler output:
a.cc: In function 'void run()':
a.cc:54:5: error: expected initializer before 'cin'
   54 |     cin>>a>>b>>h>>m;
      |     ^~~
a.cc:55:19: error: 'm' was not declared in this scope
   55 |     double c=30*h+m*0.5,d=6*m;
      |                   ^
a.cc:56:16: error: 'd' was not declared in this scope
   56 |     double e=c-d;
      |                ^
Language: C++

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

int main() {
  int A, B, H, M;
  cin >> A >> B >> H >> M;
  double radH = (double)(H * 30 + 0.5 * M) * 2 * acos(-1) / 360;
  double radM = M * 6 * 2 * acos(-1) / 360;
  cout << radH << " " << radM << endl;
  double Ax = A * cos(radH), Ay = A * sin(radH);
  double Bx = B * cos(radM), By = B * sin(radM);
  cout << setpresicion(15) << sqrt(pow(Ax - Bx, 2) + pow(Ay - By, 2));
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:11: error: 'setpresicion' was not declared in this scope
   14 |   cout << setpresicion(15) << sqrt(pow(Ax - Bx, 2) + pow(Ay - By, 2));
      |           ^~~~~~~~~~~~
Language: C++

#include <iostream>
#include <iomanip>
#include <math>

using namespace std;

int main() {
    long double a, b, h, m;
    cin >> a >> b >> h >> m;

    const long double angle = 2.0 * 3.14159265359 * (
        (h + m / 60.0) / 12.0 - m / 60.0
    );
    const long double dist = sqrt(
        (a * a + b * b) - (2.0 * a * b) * cos(angle)
    );
    cout << fixed << setprecision(20) << dist;
    return 0;
}

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

#include <iostream>
#include <iomanip>

using namespace std;

int main() {
    long double a, b, h, m;
    cin >> a >> b >> h >> m;

    const long double angle = 2.0 * 3.14159265359 * (
        (h + m / 60.0) / 12.0 - m / 60.0
    );
    const long double dist = sqrt(
        (a * a + b * b) - (2.0 * a * b) * cos(angle)
    );
    cout << fixed << setprecision(20) << dist;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:43: error: 'cos' was not declared in this scope
   14 |         (a * a + b * b) - (2.0 * a * b) * cos(angle)
      |                                           ^~~
a.cc:13:30: error: 'sqrt' was not declared in this scope
   13 |     const long double dist = sqrt(
      |                              ^~~~
Language: C++

int main(void) {
7 int a, b, h, m;
8 scanf("%d%d%d%d", &a, &b, &h, &m);
9
10 long double rad = PI * 2 * (
11 (long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long
double)m / 60.0);
13 long double rsq = (long double)(a * a + b * b) - (long double)(2 * a *
b) * cosl(rad);
14
15 printf("%20.20Lf\n", sqrtl(rsq)); 16
17 return 0;
18 }

Compiler output:
a.cc: In function 'int main()':
a.cc:2:2: error: expected ';' before 'int'
    2 | 7 int a, b, h, m;
      |  ^~~~
      |  ;
a.cc:3:2: error: expected ';' before 'scanf'
    3 | 8 scanf("%d%d%d%d", &a, &b, &h, &m);
      |  ^~~~~~
      |  ;
a.cc:4:2: error: expected ';' before numeric constant
    4 | 9
      |  ^
      |  ;
    5 | 10 long double rad = PI * 2 * (
      | ~~
a.cc:8:3: error: expected ';' before 'long'
    8 | 13 long double rsq = (long double)(a * a + b * b) - (long double)(2 * a *
      |   ^~~~~
      |   ;
a.cc:10:3: error: expected ';' before numeric constant
   10 | 14
      |   ^
      |   ;
   11 | 15 printf("%20.20Lf\n", sqrtl(rsq)); 16
      | ~~ 
a.cc:11:40: error: expected ';' before numeric constant
   11 | 15 printf("%20.20Lf\n", sqrtl(rsq)); 16
      |                                        ^
      |                                        ;
   12 | 17 return 0;
      | ~~                                      
a.cc:13:3: error: expected ';' before '}' token
   13 | 18 }
      |   ^~
      |   ;
Language: C++

#include <iostream>
using namespace std;
typedef long long ll;
#define INF 1LL<<62
#define inf 1000000007

int main() {
	long double a,b,h,m,H,M;
	cin>>a>>b>>h>>m;
	M=m*60.0;
	H=h*30.0+m*30.0/60.0;
	long double now=abs(H-M);
	long double co=now*M_PI/180.0;
	long double ans=a*a+b*b-2.0*a*b*cosl(co);
	ans=sqrt(ans);
	printf("%.11Lf",ans);
	// your code goes here
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:28: error: 'M_PI' was not declared in this scope
   13 |         long double co=now*M_PI/180.0;
      |                            ^~~~
a.cc:14:41: error: 'cosl' was not declared in this scope; did you mean 'co'?
   14 |         long double ans=a*a+b*b-2.0*a*b*cosl(co);
      |                                         ^~~~
      |                                         co
a.cc:15:13: error: 'sqrt' was not declared in this scope
   15 |         ans=sqrt(ans);
      |             ^~~~
Language: C++

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

using PI=acos(-1);

int main() {
    int a, b, h, m;
    cin >> a >> b >> h >> m;
    double dh=(double)60*h+m/720*2*PI;
    double dm=(double)m/60*2*PI;
    double hx=(double)a*cos(dh), hy=(double)a*sin(dh);
    double mx=(double)b*cos(dm), my=(double)b*sin(dm);
    double dx=hx-mx, dy=hy-my;
    double ans=sqrt(dx*dx+dy*dy);
    cout << setprecision(10) << ans << endl;
}

Compiler output:
a.cc:4:10: error: expected type-specifier before 'acos'
    4 | using PI=acos(-1);
      |          ^~~~
a.cc: In function 'int main()':
a.cc:9:36: error: 'PI' was not declared in this scope
    9 |     double dh=(double)60*h+m/720*2*PI;
      |                                    ^~
Language: C++

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

int main(){
  int a, b, h, m;
  double l, pi=3.14159265359;
  cin >> a >> b >> h >> m;

  l=sqrt(a*a+b*b-2*a*b*cos(m*pi/30-(h*60+m)*pi/360));

  printf("%.10lf\n", l);

  return

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: expected primary-expression at end of input
   15 |   return
      |         ^
a.cc:15:9: error: expected ';' at end of input
   15 |   return
      |         ^
      |         ;
a.cc:15:9: error: expected '}' at end of input
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

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

int main() {
  int a, b, h, m;
  double  ans2, sa, sb;
  cin >> a >> b >> h >> m;
  sa = (60*h+m)/360;
  sb = m/30;
  ans2 = a*a + b*b -2*a*b*cos(abs((sa-sb)*M_PI))
  cout << sqrt(ans2) << endl;


  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:49: error: expected ';' before 'cout'
   10 |   ans2 = a*a + b*b -2*a*b*cos(abs((sa-sb)*M_PI))
      |                                                 ^
      |                                                 ;
   11 |   cout << sqrt(ans2) << endl;
      |   ~~~~
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <iomanip>
#include <vector>
#include <string.h>

using namespace std;

#define PI 3.14159265358979323846

int main() {
	long double A, B, H, M;

	cin >> A >> B >> H >> M;

	long double h, m,kaku;
	m = M / 60 * 2 * PI;
	h = (H / 12 + M / 720) * 2 * PI;
	kaku = fabs(m - h);
	if (kaku > PI)kaku -= PI;

	long double ans;

	ans = A * A + B * B - 2 * A * B * cos(kaku);
	ans = sqrt(ans);
	cout << fixed << setprecision(20) << ans << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:16: error: 'fabs' was not declared in this scope; did you mean 'labs'?
   20 |         kaku = fabs(m - h);
      |                ^~~~
      |                labs
a.cc:25:43: error: 'cos' was not declared in this scope
   25 |         ans = A * A + B * B - 2 * A * B * cos(kaku);
      |                                           ^~~
a.cc:26:15: error: 'sqrt' was not declared in this scope
   26 |         ans = sqrt(ans);
      |               ^~~~
Language: C

#include <stdio.h>
int main(void){
int N,H,L;
scanf("%d %d %d %d",&N,&H,&L,&i);
for(i=0;i<N+H+L;i++){
  if(i==1){
    printf("IMPOSSIBLE");
  }
  else(i != 1){
    printf("POSSIBLE");
  }
  return 0;
}
  printf("%d %d %d %i",&N,&H,&L,&i);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:31: error: 'i' undeclared (first use in this function)
    4 | scanf("%d %d %d %d",&N,&H,&L,&i);
      |                               ^
main.c:4:31: note: each undeclared identifier is reported only once for each function it appears in
main.c:9:15: error: expected ';' before '{' token
    9 |   else(i != 1){
      |               ^
      |               ;
Language: C

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

int main(int argc, char const *argv[]) {
    const double pi = 3.141592653589793;
    int A, B, H, M;
    cin >> A >> B >> H >> M;

    double rad = 2*pi/12 * H + 2*pi/(12*60) * M - 2*pi/60 * M;
    double ans = A * A + B * B - 2 * A * B * cos(rad);
    printf("%.20f\n", sqrt(ans));
    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<bits/stdc++.h>
#define pi 3.14159265358979323846
using namespace std;
int main()
{
  int a,b;
  int h,m;
  cin>>a>>b>>h>>m;
  double hedge=h*30;
  double medge=m*6;
  hedge+=medge/12;
  double theta=abs(hedge-medge);
  theta=(theta*(pi/180));
  theta=cos(theta)
  double ans=sqrt(a*a+b*b-2*a*b*theta);
  cout<<fixed<<setprecision(10)<<ans<<endl;

  
  
}



Compiler output:
a.cc: In function 'int main()':
a.cc:14:19: error: expected ';' before 'double'
   14 |   theta=cos(theta)
      |                   ^
      |                   ;
   15 |   double ans=sqrt(a*a+b*b-2*a*b*theta);
      |   ~~~~~~           
a.cc:16:34: error: 'ans' was not declared in this scope; did you mean 'abs'?
   16 |   cout<<fixed<<setprecision(10)<<ans<<endl;
      |                                  ^~~
      |                                  abs
Language: C++

#include <iostream>
#include<math.h>
 
int main()
{
    double A,B,H,M;
    double r;
    std::cin>>A>>B>>H>>M;
    H=(H*60+M)*.5;
    H > M*6 ? r = H - M*6 : r = M*6 - H;
    if(r>180)
    {
        r=360-r;
    }
    r = r  * M_PI / 180.0;
    std::cout  <<fixed<<setprecision(9)<< sqrt((double)(A*A+B*B)-(double)(2*A*B*cos(r))) << std::endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:18: error: 'fixed' was not declared in this scope; did you mean 'std::fixed'?
   16 |     std::cout  <<fixed<<setprecision(9)<< sqrt((double)(A*A+B*B)-(double)(2*A*B*cos(r))) << std::endl;
      |                  ^~~~~
      |                  std::fixed
In file included from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/ios_base.h:1104:3: note: 'std::fixed' declared here
 1104 |   fixed(ios_base& __base)
      |   ^~~~~
a.cc:16:25: error: 'setprecision' was not declared in this scope
   16 |     std::cout  <<fixed<<setprecision(9)<< sqrt((double)(A*A+B*B)-(double)(2*A*B*cos(r))) << std::endl;
      |                         ^~~~~~~~~~~~
Language: C++

#include <iostream>
#include<math.h>
 
int main()
{
    double A,B,H,M;
    double r;
    std::cin>>A>>B>>H>>M;
    H=(H*60+M)*.5;
    H > M*6 ? r = H - M*6 : r = M*6 - H;
    if(r>180)
    {
        r=360-r;
    }
    r = (double)((r  * M_PI) / 180.0);
    printf("%.10lf\n",sqrt((double)(A*A+B*B)-(double)(2*A*B*cos(r))));
    return 0;
}
#include <iostream>
#include<math.h>
 
int main()
{
    double A,B,H,M;
    double r;
    std::cin>>A>>B>>H>>M;
    H=(H*60+M)*.5;
    H > M*6 ? r = H - M*6 : r = M*6 - H;
    if(r>180)
    {
        r=360-r;
    }
    r = (r  * M_PI) / 180.0;
    printf("%.10lf\n",sqrt((double)(A*A+B*B)-(double)(2*A*B*cos(r))));
    return 0;
}

Compiler output:
a.cc:22:5: error: redefinition of 'int main()'
   22 | int main()
      |     ^~~~
a.cc:4:5: note: 'int main()' previously defined here
    4 | int main()
      |     ^~~~
Language: C++

#include<iostream>
#include <cmath>
#include <numbers>
int main(){
    int A,  B, H, M;
    double a_x, a_y, b_x, b_y;
    double a_sita, b_sita;
    double result;
    std::cin >> A >> B >> H >> M;
    //a_sita = (2*M_PI)/12/60*(H*60+M);
    a_sita = (2*std::numbers::pi)/12/60*(H*60+M);
    //b_sita = (2*M_PI)/60*(H*60+M);
    b_sita = (2*std::numbers::pi)/60*(H*60+M);
    a_x = A*sin(a_sita+std::numbers::pi/2);
    a_y = A*cos(a_sita+std::numbers::pi/2);
    b_x = B*sin(b_sita+std::numbers::pi/2);
    b_y = B*cos(b_sita+std::numbers::pi/2);

    result = sqrt(pow(a_x - b_x, 2) + pow(a_y - b_y, 2));
    printf("%.20lf\n", result);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:22: error: 'std::numbers' has not been declared
   11 |     a_sita = (2*std::numbers::pi)/12/60*(H*60+M);
      |                      ^~~~~~~
a.cc:13:22: error: 'std::numbers' has not been declared
   13 |     b_sita = (2*std::numbers::pi)/60*(H*60+M);
      |                      ^~~~~~~
a.cc:14:29: error: 'std::numbers' has not been declared
   14 |     a_x = A*sin(a_sita+std::numbers::pi/2);
      |                             ^~~~~~~
a.cc:15:29: error: 'std::numbers' has not been declared
   15 |     a_y = A*cos(a_sita+std::numbers::pi/2);
      |                             ^~~~~~~
a.cc:16:29: error: 'std::numbers' has not been declared
   16 |     b_x = B*sin(b_sita+std::numbers::pi/2);
      |                             ^~~~~~~
a.cc:17:29: error: 'std::numbers' has not been declared
   17 |     b_y = B*cos(b_sita+std::numbers::pi/2);
      |                             ^~~~~~~
Language: Java

import java.util.Scanner;

public class Main2 {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner in = new Scanner(System.in);

		int a = in.nextInt();
		int b = in.nextInt();
		int h = in.nextInt();
		int m = in.nextInt();

		int pass_time = h*60 + m;
		double digA = (0.5 * (double)pass_time) % 360;
		double digB = (6 * pass_time) % 360;

		double result = Math.sqrt(a*a + b*b - 2*a*b*Math.cos(Math.toRadians(Math.abs(digA-digB))));
		System.out.println(result);
	}

}


Compiler output:
Main.java:3: error: class Main2 is public, should be declared in a file named Main2.java
public class Main2 {
       ^
1 error
Language: C++

#include <cmath>
#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B,H,M;
  cin >> A >> B >> H >> M;
  float nagasa;
  float iroiro;
  float kakudo;
  kakudo = abs((30*H - 5.5*M )* 3.141592653589793LL / 180); //というか長さ　πで０
  iroiro = A*A*sin(kakudo)*sin(kakudo)+B*B-2*A*B*cos(kakudo)+A*A*cos(kakudo)*cos(kakudo);
  nagasa = sqrt(iroiro);
     cout << fixed << setprecision(20);
    cout << nagasa << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:33: error: unable to find numeric literal operator 'operator""LL'
   11 |   kakudo = abs((30*H - 5.5*M )* 3.141592653589793LL / 180); //というか長さ　πで０
      |                                 ^~~~~~~~~~~~~~~~~~~
Language: C++

#include<iostream>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<map>
#include<set>
#include<queue>

using namespace std;

#define REP(i, n) for(int i = 0; i < n; i++)
#define REPR(i, n) for(int i = n; i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)
#define ALL(a) (a).begin(),(a).end()
#define PI 3.141592653589793238
#define INF 1050000000
#define INFL (long long)(4e18)

using vi = vector<int>;

template<class T>
struct Edge {
	int to;
	T cost;
	Edge() {};
	Edge(int to, T cost) : to(to), cost(cost) {};
};

template<class T>
class Graph {
	int n;
	bool directed;
	vector<vector<Edge<T>>> edges;
public:

	Graph(int n, bool directed) :n(n), directed(directed), edges(vector<vector<Edge<T>>>(n)) {};
	Graph() {};

	void add(int to, T cost) {
		emplace_back(to, cost);
	}

	int size() {
		return n;
	}
};


int main() {

	long double A, B, H, M;

	cin >> A >> B >> H >> M;

	long double argL = (H * 60 + M) * 0.5;
	long double argS = M * 6.0;

	long double theta;

	if (abs(argL - argS) <= 180) {
		theta = abs(argL - argS);
	}
	else {
		theta = (360 - max(argS, argL)) + min(argS, argL);
	}

	long double ans = sqrt(A * A + B * B - A * B * cos(theta*PI/180.0));

	cout << fixed << setprecision(15) << ans << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:67:56: error: 'cos' was not declared in this scope
   67 |         long double ans = sqrt(A * A + B * B - A * B * cos(theta*PI/180.0));
      |                                                        ^~~
a.cc:67:27: error: 'sqrt' was not declared in this scope
   67 |         long double ans = sqrt(A * A + B * B - A * B * cos(theta*PI/180.0));
      |                           ^~~~
Language: C++

#include <iostream>
#include <cstdlib>
using namespace std;
 int main(){
  double a,b,ans;
  int h,m
  cin >> a >> b >> h >> m;
        ans=a*a+b*b-a*b*cos(abs(30*h-6*m));
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: expected initializer before 'cin'
    7 |   cin >> a >> b >> h >> m;
      |   ^~~
a.cc:8:40: error: 'm' was not declared in this scope
    8 |         ans=a*a+b*b-a*b*cos(abs(30*h-6*m));
      |                                        ^
a.cc:8:25: error: 'cos' was not declared in this scope
    8 |         ans=a*a+b*b-a*b*cos(abs(30*h-6*m));
      |                         ^~~
Language: Java

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = scan.nextInt();
		int b = scan.nextInt();
		int h = scan.nextInt();
		int m = scan.nextInt();
		int time = h*60+m;//分
		double bt = time*6%360;//分針角度
		double at = time/2;//時針角度
		double sa = Math.abs(at-bt);//分針と時針のなす角度
		if(sa>180)sa = 360 - sa;
		System.out.println(Math.sqrt(Math.pow(a,2)+Math.pow(b,2)-2*a*b*Math.cos(Math.toRadians(sa))));
		//余弦定理知ってるとかレベル高www
	}
}
import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = scan.nextInt();
		int b = scan.nextInt();
		int h = scan.nextInt();
		int m = scan.nextInt();
		int time = h*60+m;//分
		double bt = time*6%360;//分針角度
		double at = time/2;//時針角度
		double sa = Math.abs(at-bt);//分針と時針のなす角度
		System.out.println(Math.sqrt(Math.pow(a,2)+Math.pow(b,2)-2*a*b*Math.cos(Math.toRadians(sa))));
		//余弦定理知ってるとかレベル高www
	}
}

Compiler output:
Main.java:18: error: class, interface, enum, or record expected
import java.util.Scanner;
^
1 error
Language: C++

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

#define PI 3.14159265358979323846264338327950L

int main() {
  long double A, B, H, M;
  cin >> A >> B >> H >> M;
  
  /* long double PI=3.14159265358; */
  long double cos = cos1(((H + M / 60.0) / 6.0 - M / 30.0) * PI);
  cout << fixed << setprecision(10) << sqrt(A * A + B * B - 2.0 * A * B * cos);
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: 'cos1' was not declared in this scope; did you mean 'cos'?
   12 |   long double cos = cos1(((H + M / 60.0) / 6.0 - M / 30.0) * PI);
      |                     ^~~~
      |                     cos
Language: C++

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

int main() {
  long double A, B, H, M;
  cin >> A >> B >> H >> M;
  
  /* long double PI=3.14159265358; */
  long double cos = cos1(((H + M / 60.0) / 6.0 - M / 30.0) * PI);
  cout << fixed << setprecision(10) << sqrt(A * A + B * B - 2.0 * A * B * cos);
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:62: error: 'PI' was not declared in this scope
   10 |   long double cos = cos1(((H + M / 60.0) / 6.0 - M / 30.0) * PI);
      |                                                              ^~
a.cc:10:21: error: 'cos1' was not declared in this scope; did you mean 'cos'?
   10 |   long double cos = cos1(((H + M / 60.0) / 6.0 - M / 30.0) * PI);
      |                     ^~~~
      |                     cos
Language: C++

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

int main() {
  double A, B, H, M;
  cin >> A >> B >> H >> M;
  
  double PI=3.14159265358979323846264338327950288;
  double cos = cos((H / 6.0 - M / 30.0) * PI);
  cout << sqrt(A * A + B * B - 2.0 * A * B * cos);
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: 'cos' cannot be used as a function
   10 |   double cos = cos((H / 6.0 - M / 30.0) * PI);
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

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

int main() {
  double A, B, H, M;
  cin >> A >> B >> H >> M;
  
  double PI=3.14159265358979323846264338327950288;
  double cos = cos((H / 6.0 - M / 30.0) * PI);
  cout << sqrt(A * A + B * B - 2.0 * A * B * cos);
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: 'cos' cannot be used as a function
    9 |   double cos = cos((H / 6.0 - M / 30.0) * PI);
      |                ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#includebits/stdc++.h>
using namespace std;
using ld =long double;
const long double PI = acos(-1);

int main(){
    int a,b,h,m;
    cin >> a >> b >> h >> m ;

    ld rad = PI * 2 * (
        (ld)h / 12.0 + ((ld)m / 60.0) / 12.0 - (ld)m / 60.0    );
    
    ld rsq = (ld)(a * a + b * b) - (ld)(2 * a * b) * cosl(rad);

    cout << sqrtl(rsq);
} 

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #includebits; did you mean #include?
    1 | #includebits/stdc++.h>
      |  ^~~~~~~~~~~
      |  include
a.cc:4:24: error: 'acos' was not declared in this scope
    4 | const long double PI = acos(-1);
      |                        ^~~~
a.cc: In function 'int main()':
a.cc:8:5: error: 'cin' was not declared in this scope
    8 |     cin >> a >> b >> h >> m ;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #includebits/stdc++.h>
a.cc:13:54: error: 'cosl' was not declared in this scope
   13 |     ld rsq = (ld)(a * a + b * b) - (ld)(2 * a * b) * cosl(rad);
      |                                                      ^~~~
a.cc:15:5: error: 'cout' was not declared in this scope
   15 |     cout << sqrtl(rsq);
      |     ^~~~
a.cc:15:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:15:13: error: 'sqrtl' was not declared in this scope
   15 |     cout << sqrtl(rsq);
      |             ^~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O2")

typedef long long ll;
long long a;
long double b;


int main()
{
	ios::sync_with_stdio(false);
    cin >> a;
    cin >> b;
	cout << ll(a * b) << 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: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < n; ++i)
using namespace std;
using ll = long long;

int main(){
  int a,b
  double h,m;
  cin >> a >> b >> h >> m;

  double ang_m = m * 6;//分針の角度(degree)
  double ang_h = h * 30 + m * 0.5;//時針の角度(degree)
  double ang = max(ang_h,ang_m) - min(ang_h,ang_m);//2本の針がなす角(degree)
  ang = ang * M_PI / 180;//radianに変換

  double ans = sqrt(a * a + b * b - 2 * a * b * cos(ang));

  cout << ans << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected initializer before 'double'
    8 |   double h,m;
      |   ^~~~~~
a.cc:9:15: error: 'b' was not declared in this scope
    9 |   cin >> a >> b >> h >> m;
      |               ^
a.cc:9:20: error: 'h' was not declared in this scope
    9 |   cin >> a >> b >> h >> m;
      |                    ^
a.cc:9:25: error: 'm' was not declared in this scope
    9 |   cin >> a >> b >> h >> m;
      |                         ^
Language: C++

#include<cstdlib>
#include<cmath>
#include<iomanip>
#include<iostream>

using namespace std;

int main(){
    int a,b,h,m;
    double ang,rad,ans;
    static const double pi = 3.141592653589793;
    
    cin>>a>>b>>h>>m;
    
    ang=30*h+0.5*m-6*m;
    
    if(ang==0){
        ans=b-a;
    }else if(ang==180)  }else{
        ans=a+b;
    }else{
        rad=ang*pi/180;
        ans=pow(a,2.0)+pow(b,2.0)-2.0*a*b*cos(rad);
    }

    cout<<fixed<<setprecision(10)<<sqrt(ans)<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:25: error: expected primary-expression before '}' token
   19 |     }else if(ang==180)  }else{
      |                         ^
a.cc: At global scope:
a.cc:19:26: error: expected unqualified-id before 'else'
   19 |     }else if(ang==180)  }else{
      |                          ^~~~
a.cc:21:6: error: expected unqualified-id before 'else'
   21 |     }else{
      |      ^~~~
a.cc:26:5: error: 'cout' does not name a type
   26 |     cout<<fixed<<setprecision(10)<<sqrt(ans)<<endl;
      |     ^~~~
a.cc:27:1: error: expected declaration before '}' token
   27 | }
      | ^
Language: C++

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

int main(void){
  	int a, b, h, m;
  	double ans, th;
  	const double PI = acos(-1);
	cin >> a >> b >> h >> m;
  	th = (30*h + 0.5*m - 6*m) * PI/180 ;
  	ans = sqrt(a*a + b*b - 2*a*b*cos(th));
  	printf("%.10f", ans)
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:29: error: expected ';' before 'return'
   15 |         printf("%.10f", ans)
      |                             ^
      |                             ;
   16 |         return 0;
      |         ~~~~~~
Language: C++

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

int main(void){
  	int a, b, h, m, th;
	cin >> a >> b >> h >> m;
  	th = math.rad((30*h+0.5*m) - (3*m));
  	cout << sqrt(a*a + b*b -2*a*b*cos(th));
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:14: error: 'math' was not declared in this scope; did you mean 'th'?
   11 |         th = math.rad((30*h+0.5*m) - (3*m));
      |              ^~~~
      |              th
Language: C++

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

int main(void){
	cin >> a >> b >> h >> m;
  	th = math.rad((30*h+0.5*m) - (3m));
  	cout << sqrt(a*a + b*b -2*a*b*cos(th));
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:16: error: 'a' was not declared in this scope
    9 |         cin >> a >> b >> h >> m;
      |                ^
a.cc:9:21: error: 'b' was not declared in this scope
    9 |         cin >> a >> b >> h >> m;
      |                     ^
a.cc:9:26: error: 'h' was not declared in this scope
    9 |         cin >> a >> b >> h >> m;
      |                          ^
a.cc:9:31: error: 'm' was not declared in this scope; did you mean 'tm'?
    9 |         cin >> a >> b >> h >> m;
      |                               ^
      |                               tm
a.cc:10:9: error: 'th' was not declared in this scope; did you mean 'tm'?
   10 |         th = math.rad((30*h+0.5*m) - (3m));
      |         ^~
      |         tm
a.cc:10:14: error: 'math' was not declared in this scope
   10 |         th = math.rad((30*h+0.5*m) - (3m));
      |              ^~~~
a.cc:10:39: error: unable to find numeric literal operator 'operator""m'
   10 |         th = math.rad((30*h+0.5*m) - (3m));
      |                                       ^~
Language: C++

/* include c++ libraries */
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <unordered_map>
#include <map>
#include <queue>
#include <set>

/* include c-lang libraries */
#include <climits>
#include <cmath>

/* include my libraries */
//#include <show_vec.hh>


#define DEBUG if(false)

using namespace std;

int main(){
  int A, B, H, M;
  cin >> A >> B >> H >> M;
  double alpha = (double)M / 2.0) + 30.0*(double)H;
  double beta  = 6.0*(double)M;
  double sita;
  if(alpha > beta){
    sita = alpha - beta;
  }else{
    sita = beta - alpha;
  }

  if(sita > 180.0){ sita = 360.0-sita; }
  //printf("sita : "); cout << sita << endl;
  double x = sqrt(A*A + B*B - 2*A*B*cos(M_PI*sita/180.0));

  printf("%0.20lf\n", x);
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:33: error: expected ',' or ';' before ')' token
   26 |   double alpha = (double)M / 2.0) + 30.0*(double)H;
      |                                 ^
Language: C++

int main(){
  int A, B, H, M;
  cin >> A >> B >> H >> M;
  //double sita = abs(((double)M / 2.0) + 30.0*(double)H - 60.0*(double)M);
  double sita = abs( ((double)M / 2.0) + 30.0*(double)H- 6.0*(double)M );
 
//  printf("sita : %lf, ", sita); cout << sita << endl;
 
  if(sita > 180.0){ sita -= 180.0; }
  //printf("sita : "); cout << sita << endl;
  double x = sqrt(A*A + B*B - 2*A*B*cos(M_PI*sita/180.0));
 
  printf("%0.20lf\n", x);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> A >> B >> H >> M;
      |   ^~~
a.cc:5:17: error: 'abs' was not declared in this scope
    5 |   double sita = abs( ((double)M / 2.0) + 30.0*(double)H- 6.0*(double)M );
      |                 ^~~
a.cc:11:41: error: 'M_PI' was not declared in this scope
   11 |   double x = sqrt(A*A + B*B - 2*A*B*cos(M_PI*sita/180.0));
      |                                         ^~~~
a.cc:11:37: error: 'cos' was not declared in this scope; did you mean 'const'?
   11 |   double x = sqrt(A*A + B*B - 2*A*B*cos(M_PI*sita/180.0));
      |                                     ^~~
      |                                     const
a.cc:11:14: error: 'sqrt' was not declared in this scope
   11 |   double x = sqrt(A*A + B*B - 2*A*B*cos(M_PI*sita/180.0));
      |              ^~~~
a.cc:13:3: error: 'printf' was not declared in this scope
   13 |   printf("%0.20lf\n", x);
      |   ^~~~~~
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: Java

import java.util.Scanner;

public class C {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer a = scanner.nextInt();
        Integer b = scanner.nextInt();
        Integer h = scanner.nextInt();
        Integer m = scanner.nextInt();

        double result;

        double angle = (h*360/12 + m*30/60) - m*360/60;

        result = Math.sqrt(Math.pow(a,2) + Math.pow(b,2) - 2*a*b*Math.cos(Math.toRadians(angle)));

        System.out.printf("%.20f",result);
    }
}


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

import java.util.Scanner;

public class C {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer a = scanner.nextInt();
        Integer b = scanner.nextInt();
        Integer h = scanner.nextInt();
        Integer m = scanner.nextInt();

        double result;

        double angle = (h*360/12 + m*30/60) - m*360/60;

        result = Math.sqrt(Math.pow(a,2) + Math.pow(b,2) - 2*a*b*Math.cos(Math.toRadians(angle)));

        System.out.printf("%.10f",result);
    }
}

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

#include <bits/stdc++.h>
using namespace std;
const double PI = acos(-1.0);
int main(){
	double a,b;
  	int h,m;
  	cin>>a>>b>>h>>m;
  	double hh = 360.0 / 720.0 * ( h * 60 + m );
  	double mm = 360 / 60.0 * m;
  	double ang = hh - mm;
  	if (ang < 0) ang = -ang;
  	if (ang >= 180) ang -= 180.0;
  	double ca = cos( ang * PI / 180.0 );
  	double ans2 = a * a + b * b - 2.0 * ca * a * b;
  	double ans = sqrt(ans2);
  	print("%.12lf\n",ans);
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:9: error: 'print' was not declared in this scope; did you mean 'rint'?
   16 |         print("%.12lf\n",ans);
      |         ^~~~~
      |         rint
Language: C++

#include <bits/stdc++.h>
using namespace std;
const double PI = asin(-1.0);
int main(){
	double a,b;
  	int h,m;
  	cin>a>>b>>h>>m;
  	double hh = 360.0 / 720.0 * h;
  	double mm = 360 / 60.0 * m;
  	double ang = hh - mm;
  	if (ang < 0) ang = -ang;
  	if (ang >= 180) ang -= 180.0;
  	double ca = cos( ang * PI / 180.0 );
  	double ans2 = a * a + b * b - 2.0 * ca * a * b;
  	double ans = sqrt(ans2);
  	cout<<ans<<endl;
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:14: error: invalid operands of types 'double' and 'double' to binary 'operator>>'
    7 |         cin>a>>b>>h>>m;
      |             ~^~~
      |             |  |
      |             |  double
      |             double
Language: Java

import java.io.*;
public class Main{
  public static void main(String[] args) throws IOException{
    
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int A,B,H,M;
    
    try{
      String[] contexts = reader.readLine().split(" ");
      A = Integer.parseInt(contexts[0]);
      B = Integer.parseInt(contexts[1]);
      H = Integer.parseInt(contexts[2]);
      M = Integer.parseInt(contexts[3]);
    }finally{
      reader.close();
    }
    
    // 角度
    int intAngle = Math.abs((360 / 12) * H - (360 / 60) * M);
    
    // 長さ
    double dblLen;
    dblLen += Math.pow(A * 1.0, 2.0);
    dblLen += Math.pow(B * 1.0, 2.0);
    dblLen -= 2.0 * A * B * Math.cos(Math.toRadians(intAngle));
    
    System.out.print(Math.sqrt(dblLen));
  }
}


Compiler output:
Main.java:23: error: variable dblLen might not have been initialized
    dblLen += Math.pow(A * 1.0, 2.0);
    ^
1 error
Language: Java

import java.io.*;
public class Main{
  public static void main(String[] args) throws IOException{
    
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int A,B,H,M;
    
    try{
      String[] contexts = reader.readLine().split(" ");
      A = Integer.parseInt(contexts[0]);
      B = Integer.parseInt(contexts[1]);
      H = Integer.parseInt(contexts[2]);
      M = Integer.parseInt(contexts[3]);
    }finally{
      reader.close();
    }
    
    // 角度
    int intAngle = Math.abs((360 / 12) * H - (360 / 60) * M);
    
    // 長さ
    double dblLen;
    dblLen += Math.pow(A * 1.0, 2.0);
    dblLen += Math.pow(B * 1.0, 2.0);
    dblLen -= 2.0 * A * B * Math.cos(Math.toRadians(intAngle));
    
    System.out.print(sqrt(dblLen));
  }
}


Compiler output:
Main.java:27: error: cannot find symbol
    System.out.print(sqrt(dblLen));
                     ^
  symbol:   method sqrt(double)
  location: class Main
1 error