criyle/codenet-compile-errors huggingface dataset:
Language: Java

import java.util.*;
public class Main
{
  private int absdiff(int a,int b)
  {
    return (a>b?a-b:b-a);
  }
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    sc.nextLine();
    int arr[][]=new int[n][];
    String s=sc.nextLine();
    for(int i=0;i<n;i++)
    {
      arr[i]=new int[n-i];
      arr[i][0]=Integer.parseInt(s.charAt(i));
    }
    Main ob=new Main();
    for(int j=1;j<n;j++)
    {
      for(int i=0;i<(n-j);j++)
      {
        arr[i][j]=ob.absdiff(arr[i][j-1],arr[i+1][j-1]);
      }
    }
    System.out.println(arr[0][n-1]);
  }
}


Compiler output:
Main.java:18: error: incompatible types: char cannot be converted to String
      arr[i][0]=Integer.parseInt(s.charAt(i));
                                         ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error
Language: C

#include<stdio.h>
int main()
{
  int n,i,j;
  scanf("%d\",&n);
  int x[n];
  int a[n][n]
  for(i=0;i<n;i++)
    scanf("%d",&x[i]);
  for(i=0;i<n;i++)
  {
    for(j=0;j<n;j++)
    {
      if(i==0)
        a[i][j]=x[j];
      else
        a[i][j]=a[i-1][j]-a[i-1][j+1];
    }
  }
  printf("%d"a[n-1][1]);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:5:9: warning: missing terminating " character
    5 |   scanf("%d\",&n);
      |         ^
main.c:5:9: error: missing terminating " character
    5 |   scanf("%d\",&n);
      |         ^~~~~~~~~~
main.c:6:3: error: expected expression before 'int'
    6 |   int x[n];
      |   ^~~
main.c:21:12: error: expected ';' before '}' token
   21 |   return 0;
      |            ^
      |            ;
   22 | }
      | ~
Language: Java

import java.util.*;
public class Main
{
  private int absdiff(int a,int b)
  {
    return (a>b?a-b:b-a);
  }
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    sc.nextLine();
    int arr[][]=new int[n][];
    String s=sc.nextLine();
    for(int i=0;i<n;i++)
    {
      arr[i]=new int[n-i];
      arr[i][0]=Integer.parseInt(sc.charAt(i));
    }
    Main ob=new Main();
    for(int j=1;j<n;j++)
    {
      for(int i=0;i<(n-j);j++)
      {
        arr[i][j]=ob.absdiff(arr[i][j-1],arr[i+1][j-1]);
      }
    }
    System.out.println(arr[0][n-1]);
  }
}


Compiler output:
Main.java:18: error: cannot find symbol
      arr[i][0]=Integer.parseInt(sc.charAt(i));
                                   ^
  symbol:   method charAt(int)
  location: variable sc of type Scanner
1 error
Language: Java

import java.util.*;
public class Main
{
  private int absdiff(int a,int b)
  {
    return (a>b?a-b:b-a);
  }
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    sc.nextLine();
    int arr[][]=new int[n];
    for(int i=0;i<n;i++)
    {
      arr[i]=new int[n-i];
      arr[i][0]=sc.nextInt();
    }
    Main ob=new Main();
    for(int j=1;j<n;j++)
    {
      for(int i=0;i<(n-j);j++)
      {
        arr[i][j]=ob.absdiff(arr[i][j-1],arr[i+1][j-1]);
      }
    }
    System.out.println(arr[0][n-1]);
  }
}

Compiler output:
Main.java:13: error: incompatible types: int[] cannot be converted to int[][]
    int arr[][]=new int[n];
                ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	getline(cin,s);
	long long int x[n][n];
	for(long long int i=1;i<=n;i++){
		x[1][i]=s[i-1];
	}
	long long int p=n-1;
	for(long long int i=2;i<=n;i++){
		for(long long int j=p;j>=1;j--){
			x[i][j]=x[i-1][j]-x[i-1][j+1];
			if(x[i][j]<0){
				x[i][j]=x[i][j]-(2*(x[i][j]));
			}	
		}
		p=p-1;
	}
	cout<<x[n][1];
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:25: error: 'n' was not declared in this scope
    6 |         long long int x[n][n];
      |                         ^
a.cc:8:17: error: 'x' was not declared in this scope
    8 |                 x[1][i]=s[i-1];
      |                 ^
a.cc:13:25: error: 'x' was not declared in this scope
   13 |                         x[i][j]=x[i-1][j]-x[i-1][j+1];
      |                         ^
a.cc:20:15: error: 'x' was not declared in this scope
   20 |         cout<<x[n][1];
      |               ^
Language: Java

import java.util.*;
public class Main
{
  private int absdiff(int a,int b)
  {
    return (a>b?a-b:b-a);
  }
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    sc.nextLine();
    int arr[][]=new int[n];
    for(int i=0;i<n;i++)
    {
      arr[i]=new int[n-i];
      arr[i][0]=sc.nextInt();
    }
    for(int j=1;j<n;j++)
    {
      for(int i=0;i<(n-j);j++)
      {
        arr[i][j]=absdiff(arr[i][j-1],arr[i+1][j-1]);
      }
    }
    System.out.println(arr[0][n-1]);
  }
}

Compiler output:
Main.java:13: error: incompatible types: int[] cannot be converted to int[][]
    int arr[][]=new int[n];
                ^
Main.java:23: error: non-static method absdiff(int,int) cannot be referenced from a static context
        arr[i][j]=absdiff(arr[i][j-1],arr[i+1][j-1]);
                  ^
2 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define pf push_front
#define F first
#define re return
#define S second
#define ll long long
#define f(i) return cout<<i<<"\n",0;
#define vi vector<int>
#define vl vector<ll>
#define vs vector<string>
#define vii vector<pii>
#define vll vector<pll>
#define lp(i,a,b) for (int i=(a);i<=(int)(b);++i)
#define lp2(i,a,b) for (int i=(a);i>=(b);--i)
#define clr(c,x) memset(c,x,sizeof(c))
#define allr(v) v.rbegin(),v.rend()
#define all(v) v.begin(),v.end()
const int N=1e5+5,mod=(int)1e9+7;
int main()
{
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    int n;
    cin>>n;
    string s;
    cin>>s;
    vi v;
    for (auto u:s) v.pb(u-'0');
    while ((int)v.size()>1)
    {
        vi vv;
        lp(i,1,v.size()-1)
        {
            int x=abs(v[i]-v[i-1]);
            vv.pb(x);
        }
        v.clear();
        int cnt=0;
        while(i<vv.size())
        {
            if (vv[i])
            {
                v.pb(vv[i]);
                i++;
                continue;
            }
            int j=i,cnt=0;
            while(j<vv.size()&&vv[j]==vv[i])
            {
                j++;
                cnt++;
            }
            if (cnt&1) v.pb(0);
            else
            {
                v.pb(0);
                v.pb(0);
            }
            i=j;
        }
    }
    if (!v.size()) f(0);
    cout<<v.back()<<"\n";
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:15: error: 'i' was not declared in this scope
   42 |         while(i<vv.size())
      |               ^
Language: C++

#include <bits/stdc++.h>
#include "../lib/math/comb.hpp"

using namespace std;

#define SZ(x) (int)(x.size())

using ll = long long;
using ld = long double;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vll = vector<ll>;
using vvll = vector<vector<ll>>;
const double eps = 1e-10;
const ll MOD = 1000000007;
const int INF = 1000000000;
const ll LINF = 1ll<<50;

template<typename T>
void printv(const vector<T>& s) {
  for(int i=0;i<(int)(s.size());++i) {
    cout << s[i];
    if(i == (int)(s.size())-1) cout << endl;
    else cout << " ";
  }
}

template<typename T1, typename T2>
ostream& operator<<(ostream &os, const pair<T1, T2> p) {
  os << p.first << ":" << p.second;
  return os;
}

int cnt2(int n) {
  int res = 0;
  while(n %  2 == 0) {
    res++;
    n /= 2;
  }
  return res;
}

vi coef;
void make_coef(int n) {
  int ue = 0;
  int sita = 0;
  coef.push_back(0);
  for(int i=1;i<=n;++i) {
    ue += cnt2(n-i+1);
    sita += cnt2(i);
    //cout << "ue:" << ue << endl;
    //cout << "sita:" << sita << endl;
    coef.push_back((ue - sita) % 2);
  }
}


int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(10);

  int n; cin >> n;
  string s; cin >> s;
  vi a(n);
  for(int i=0;i<n;++i) {
    a[i] = s[i] - '0';
  }

  vi v(n);
  bool two = false;
  for(int i=0;i<n-1;++i) {
    v[i] = abs(a[i+1] - a[i]);
    two |= v[i] == 2;
  }

  int pos = 1;
  while(pos < n-1 && two) {
    two = false;
    //printv(v);
    for(int i=0;i<n-pos-1;++i) {
      //cout << "A";
      v[i] = abs(v[i+1] - v[i]);
      two |= v[i] == 2;
    }
    //cout << endl;
    pos++;
  }
  //printv(v);
  if(two) {
    cout << 2 << endl;
    return 0;
  }
  
  int cnt = n - pos;
  make_coef(cnt-1);
  //cout << pos << endl;
  //printv(v);
  //printv(coef);
  int ans = 0;
  for(int i=0;i<=cnt;++i) {
    ans ^= !coef[i] & v[i];
  }
  cout << ans << endl;

}


Compiler output:
a.cc:2:10: fatal error: ../lib/math/comb.hpp: No such file or directory
    2 | #include "../lib/math/comb.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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


#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long;

/* vector<int> A(N); 
    vector<pair<int, int> > tasks; ＃ソートした場合、１つ目でソート
　tie(b, a) = p.at(i); #pairを分割
    tasks.emplace_back(b, a)  ＃配列tasksの最後に(b,a)を追加
　xの二乗:  pow(x, 2.0) 
    小さい順: sort(v.begin(), v.end());
    大きい順: reverse(v.begin(), v.end());
    int: -2,147,483,648 ～ 2,147,483,647
    ll: -9,223,372,036,854,775,808 ~ 9,223,372,036,854,775,807
    // int型の2次元配列(3×4要素の)の宣言
    vector<vector<int>> data(3, vector<int>(4));
*/
 
int main() {
  
  ll N;
  cin >> N;
  
  string A;
  cin >> A;
  vector<int> B(N); 
  rep(i,N){
  	B[i]=stoi(A.at(i));
  } 
  
  for(int i = 1; i<N; i++){
    rep(l,N-i){
      B[i]=abs(B[i]-B[i+1]);
    }
  }
  
  cout << B[0] << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:18: error: no matching function for call to 'stoi(__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type&)'
   30 |         B[i]=stoi(A.at(i));
      |              ~~~~^~~~~~~~~
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:4164:3: note: candidate: 'int std::__cxx11::stoi(const std::string&, std::size_t*, int)'
 4164 |   stoi(const string& __str, size_t* __idx = 0, int __base = 10)
      |   ^~~~
/usr/include/c++/14/bits/basic_string.h:4164:22: note:   no known conversion for argument 1 from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to 'const std::string&' {aka 'const std::__cxx11::basic_string<char>&'}
 4164 |   stoi(const string& __str, size_t* __idx = 0, int __base = 10)
      |        ~~~~~~~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:4432:3: note: candidate: 'int std::__cxx11::stoi(const std::wstring&, std::size_t*, int)'
 4432 |   stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
      |   ^~~~
/usr/include/c++/14/bits/basic_string.h:4432:23: note:   no known conversion for argument 1 from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to 'const std::wstring&' {aka 'const std::__cxx11::basic_string<wchar_t>&'}
 4432 |   stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
      |        ~~~~~~~~~~~~~~~^~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	getline(cin,s);
	long long int x[n][n];
	for(long long int i=1;i<=n;i++){
		cin>>y;
		x[1][i]=s[i-1];
	}
	long long int p=n-1;
	for(long long int i=2;i<=n;i++){
		for(long long int j=p;j>=1;j--){
			x[i][j]=x[i-1][j]-x[i-1][j+1];
			if(x[i][j]<0){
				x[i][j]=x[i][j]-(2*(x[i][j]));
			}	
		}
		p=p-1;
	}
	cout<<x[n][1];
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:25: error: 'n' was not declared in this scope
    6 |         long long int x[n][n];
      |                         ^
a.cc:8:22: error: 'y' was not declared in this scope
    8 |                 cin>>y;
      |                      ^
a.cc:9:17: error: 'x' was not declared in this scope
    9 |                 x[1][i]=s[i-1];
      |                 ^
a.cc:14:25: error: 'x' was not declared in this scope
   14 |                         x[i][j]=x[i-1][j]-x[i-1][j+1];
      |                         ^
a.cc:21:15: error: 'x' was not declared in this scope
   21 |         cout<<x[n][1];
      |               ^
Language: Java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {
public static void main(String args[])
{
    try{
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        
        int ar[]=new int[n];
        for(int i=0;i<n;i++)
        {
            ar[i]=sc.nextInt();
        }
        int f=0;
        while(n>=1)
        {
             f=0;
            for(int i=0;i<n-1;i++)
            {
                ar[i]=Math.abs(ar[i]-ar[i+1]);
                if(ar[i]==0)
                f++;

            }
            if(f==n-1)
            break;
            n--;
        }
        System.out.println(ar[0]);
    }
    catch(Exception e)
    {
        return;
    }
}
}


Compiler output:
Main.java:9: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
1 error
Language: C++

#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx,avx2,fma")
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define mod 1000000007
#define fi first
#define se second
#define pii pair<int,int>
//#define int long long
#define endl '\n'
#define pll pair<long long,long long>
#define LONGLONG_MAX 100000000000000
using namespace std;
template <typename T>
using ordered_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
long long power(long long a,long long b){
    long long ans=1;
    while(b>0){
        if(b&1){ans=(ans*a)%mod;}
                a=(a*a)%mod;
                b>>=1;
        }
    return ans;
        
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    srand(time(0));
    int n;
    cin>>n;
    
    string s;
    cin>>s;
    vector<int>v;
    for(int i=0;i<n;i++){
        
        v.push_back(s[i]-'0');
    }
    if(n>10000){
        n=10000;
        v.clear();
    }
    for(int i=0;i<n;i++){
        
        v.push_back(a[rand()%3]);
    }
    while(v.size()>1){
        n=v.size();
        vector<int>v1;
        for(int i=0;i<n-1;i++){
            //cout<<abs(v[i]-v[i+1])<<" ";
            v1.push_back(abs(v[i]-v[i+1]));
        }
        //cout<<endl;
        v=v1;
    }
    cout<<v[0];
    return 0;
}


Compiler output:
a.cc: In function 'int32_t main()':
a.cc:51:21: error: 'a' was not declared in this scope
   51 |         v.push_back(a[rand()%3]);
      |                     ^
Language: C

N = gets.to_i
ary = gets.split("").map(&:to_i)
mtx = Array.new(N){Array.new()}

mtx[0] = ary

if N == 2
    if ary[0] <= ary[1]
        puts ary[1] - ary[0]
    else
        puts ary[0] - ary[1]
    end
else
    (N - 1).times do |j|
        (N - j - 1).times  do |i|
            if mtx[j][i] <= mtx[j][i + 1]
                mtx[j + 1] <<  mtx[j][i + 1] -  mtx[j][i]
            else
                mtx[j + 1] << mtx[j][i] -  mtx[j][i + 1]
            end
        end
    end
    puts mtx[N - 1]
end


Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | N = gets.to_i
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'N' [-Wimplicit-int]
main.c:1:5: error: 'gets' undeclared here (not in a function)
    1 | N = gets.to_i
      |     ^~~~
main.c:2:1: error: expected ',' or ';' before 'ary'
    2 | ary = gets.split("").map(&:to_i)
      | ^~~
main.c:5:1: warning: data definition has no type or storage class
    5 | mtx[0] = ary
      | ^~~
main.c:5:1: error: type defaults to 'int' in declaration of 'mtx' [-Wimplicit-int]
main.c:5:10: error: 'ary' undeclared here (not in a function)
    5 | mtx[0] = ary
      |          ^~~
main.c:7:1: error: expected ',' or ';' before 'if'
    7 | if N == 2
      | ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  long long N;
  std::cin >> N;
  int X[N][N] = {};
  string str;
  std::cin >> str;
  string A;
  for (long long i = 0; i < N; i++) {
     A = str[i];
    X[0][i] = stoi(A);
  }
  for (long long i = 1; i < N; i++) {
    for (long long j = 0; j <N-i ; j++) {
      X[i][j] = abs(X[i-1][j]- X[i-1][j+1]);
    }
  }
  }
  std::cout << X[N-1][0] << endl;
}


Compiler output:
a.cc:20:8: error: 'cout' in namespace 'std' does not name a type
   20 |   std::cout << X[N-1][0] << endl;
      |        ^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:21:1: error: expected declaration before '}' token
   21 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  long long N;
  std::cin >> N;
  int X[N][N] = {};
  string str;
  std::cin >> str;
  string A;
  for (long long i = 0; i < N; i++) {
     A = str[i];
    X[0][i] = stoi(A);
  }
  for (long long i = 1; i < N; i++) {
    for (long long j = 0; j <N-i ; j++) {
      X[i][j] = abs(X[i-1][j]- X[i-1][j+1]);
    }
  }
  for (long long i = 0; i < N; i++) {
    for (long long i = 0; j < N; j++) {
      std::cout << X[i][j] << '\n';
    }
  }
  std::cout << X[N-1][0] << endl;
}
#include <bits/stdc++.h>
using namespace std;
int main() {
  long long N;
  std::cin >> N;
  int X[N][N] = {};
  string str;
  std::cin >> str;
  string A;
  for (long long i = 0; i < N; i++) {
     A = str[i];
    X[0][i] = stoi(A);
  }
  for (long long i = 1; i < N; i++) {
    for (long long j = 0; j <N-i ; j++) {
      X[i][j] = abs(X[i-1][j]- X[i-1][j+1]);
    }
  }
  for (long long i = 0; i < N; i++) {
    for (long long i = 0; j < N; j++) {
      std::cout << X[i][j] << '\n';
    }
  }
  std::cout << X[N-1][0] << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:27: error: 'j' was not declared in this scope
   20 |     for (long long i = 0; j < N; j++) {
      |                           ^
a.cc: At global scope:
a.cc:28:5: error: redefinition of 'int main()'
   28 | int main() {
      |     ^~~~
a.cc:3:5: note: 'int main()' previously defined here
    3 | int main() {
      |     ^~~~
a.cc: In function 'int main()':
a.cc:45:27: error: 'j' was not declared in this scope
   45 |     for (long long i = 0; j < N; j++) {
      |                           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int abs(int n)
{
  return (x>=0)?x:-x;
}
int main()
{
  int n;
  cin>>n;
  int a[n+5];
  for(int i=1;i<=n;i++)
  {
    cin>>a[i];
  }
  int x[n+5][n+5];
  for(int i=1;i<=n;i++)
  {
    for(int j=1;j<=n;j++)
    {
      if(i==1)
      {
        x[i][j]=a[j];
      }
      else
      {
        x[i][j]=abs(x[i-1][j]-x[i-1][j+1]);
      }
    }
  }
  cout<<x[n][1];
  return 0;
}

Compiler output:
a.cc: In function 'int abs(int)':
a.cc:5:11: error: 'x' was not declared in this scope
    5 |   return (x>=0)?x:-x;
      |           ^
Language: Java

import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int a[] = new int[N];
    String S = sc.next();
    for(int i=0;i<N;i++){
      a[i] = Integer.parseInt(S.substring(i,i+1));
    }
    int x[][] = new int[N][N];
    for(int i=0;i<N;i++){
      x[0][i]=a[i];
    }
//    for(int i=1;i<N;i++){
//      for(int j=0;j<N-i;j++){
//        x[i][j]=Math.abs(x[i-1][j]-x[i-1][j+1]);
//      }
//    }
    System.out.println(Math.abs(a[0]-a[N]);
//    for(int i=0;i<N;i++){
//      for(int j=0;j<N;j++){
//        System.out.print(x[i][j]);
//      }
//      System.out.println("");
//    }
//    System.out.println(x[N-1][0]);
      
    
  }
  

  
}


Compiler output:
Main.java:20: error: ')' or ',' expected
    System.out.println(Math.abs(a[0]-a[N]);
                                          ^
1 error
Language: C++


#include<stdio.h>
#include<math.h>
#include<stdlib.h>
int rui(int k){
    int ans = 1;
    for(int i  = 0;i < k;i++){
        ans = ans * 10;
    }
    return ans;
}

int main(void){
    int n;
    scanf("%d",&n);
    int a[n + 4][n + 4];
    int d;
    int b;
    scanf("%d",&d);
    for(int i = 0;i < n;i++){
        a[0][i] = d / rui(n-1-i);
        d = d % rui(n-1-i);
        
        
       
    }
    for(int i = 1;i< n;i++){
        for(int j = 0;j < n-i;j++){
            a[i][j] = abs(a[i-1][j]-a[i-1][j +1]);
        }
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:31:6: error: expected '}' at end of input
   31 |     }
      |      ^
a.cc:13:15: note: to match this '{'
   13 | int main(void){
      |               ^
Language: C++

#include<iostream>
#include<string>
using namespace std;

int main{
  int n; cin>>n;
  string S; cin>>S;
  cout<<0<<endl;
  return 0;
}

Compiler output:
a.cc:5:5: error: cannot declare '::main' to be a global variable
    5 | int main{
      |     ^~~~
a.cc:6:3: error: expected primary-expression before 'int'
    6 |   int n; cin>>n;
      |   ^~~
a.cc:6:3: error: expected '}' before 'int'
a.cc:5:9: note: to match this '{'
    5 | int main{
      |         ^
a.cc:6:10: error: 'cin' does not name a type
    6 |   int n; cin>>n;
      |          ^~~
a.cc:7:13: error: 'cin' does not name a type
    7 |   string S; cin>>S;
      |             ^~~
a.cc:8:3: error: 'cout' does not name a type
    8 |   cout<<0<<endl;
      |   ^~~~
a.cc:9:3: error: expected unqualified-id before 'return'
    9 |   return 0;
      |   ^~~~~~
a.cc:10:1: error: expected declaration before '}' token
   10 | }
      | ^
Language: C++

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

int main(){

int N;
vector(int)a;

cin>>N>>a;

if(a.at(1)==1){cout<<1<<endl;}

else{cout<<0<<endl;}

}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: missing template arguments before '(' token
    7 | vector(int)a;
      |       ^
a.cc:7:8: error: expected primary-expression before 'int'
    7 | vector(int)a;
      |        ^~~
a.cc:9:9: error: 'a' was not declared in this scope
    9 | cin>>N>>a;
      |         ^
Language: C++

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define int long long int
// #define ll int128_t
#define ld long double
#define ff first
#define ss second
#define mp make_pair
#define IOS std::ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define pb push_back
#define eb emplace_back
#define pii pair<int, int>
#define endl '\n'
#define all(x) x.begin(),x.end()
#define f(i,j,l) for(i=j;i<l;i++)
#define smax(a,b) a=max(a,b)
#if !defined(ONLINE_JUDGE)
#include "debugging.h"
#endif
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
// find_by_order(k)  returns iterator to kth element starting from 0;
// order_of_key(k) returns count of elements strictly smaller than k;
// erase,insert same as normal set

// int const mod = 7340033;
int const mod = 1e9+7;
int power(int a,int b,int m){
    int res = 1;
    while(b){
        if(b&1){
            res = res*a;
            res %= m;
        }
        a=a*a;
        a%=m;
        b=b/2;
    }
    return res;
}
 
int inverse(int x){
    return power(x,mod-2,mod);
}

int const N = 1e6+5;
int const inf = 2e16;

void solve(){  
    int n,i,j,l,m,k;
    cin>>n;
    string s;
    cin>>s;
    vector<pii> v;

    for(i=0;i<n;i++){
        int x = s[i]-'0';
        v.pb({x,i});
    }

    vector<pii> u;
    for(i=0;i<v.size();i++){
        if(u.size() ==0 ) u.pb({v[i].first,1});
        else{
            if(v[i].first == u.back().first){
                u.back().second++;
            }
            else{
                u.pb({v[i].first,1});
            }
        }
    }

    // cout<<"Ok"<<endl;
    // dbg(u);
    // int c = 10;
    while(u.size() > 1){
        vector<pii> tmp;
        for(i=0;i+1<u.size();i++){
            if(u[i].second == 1){
                tmp.pb({abs(u[i+1].first-u[i].first) , 1});
            }
            else{
                tmp.pb({0,u[i].ss-1});
                tmp.pb({abs(u[i+1].ff-u[i].ff) , 1});
            }
        }

        vector<pii> tmp1;
        for(i=0;i<tmp.size();i++){
            if(tmp1.size() == 0){
                tmp1.pb(tmp[i]);
            }
            else{
                if(tmp1.back().first == tmp[i].first){
                    tmp1.back().second+=tmp[i].second;
                }
                else{
                    tmp1.pb(tmp[i]);
                }
            }
        }

        u = tmp1;
        // dbg(u);
    }

    if(u[0].second == 1){
        cout<<u[0].first<<endl;
    }
    else{
        cout<<0<<endl;
    }
}       


int32_t main(){
    // IOS;
    int t;
    t = 1;
    // precompute();
    // cin>>t;
    for(int tt=1;tt<=t;tt++){
        solve();
    }
    return 0;
}

/*

*/

Compiler output:
a.cc:21:10: fatal error: debugging.h: No such file or directory
   21 | #include "debugging.h"
      |          ^~~~~~~~~~~~~
compilation terminated.
Language: Java

import java.io.*;
import java.util.*;
import java.lang.*;
public class atcoder{
	public static int g=0;
	public static int fun(int i,int j,int[] arr){
		if(i==1){
			return arr[j-1];
		}else{
			int x=Math.abs(fun(i-1,j,arr)-fun(i-1,j+1,arr));
			return x;
		
		}
		
		

	}
	public static void main(String[] arg){
		Scanner in=new Scanner(System.in);
		int n=in.nextInt();
		String s=in.next();
		int[] arr=new int[n];
		for(int k=0;k<n;k++){
			char c=s.charAt(k);

			arr[k]=Integer.parseInt(String.valueOf(c));
		}
		int ans=fun(n,1,arr);
		System.out.println(ans);

	}
}

Compiler output:
Main.java:4: error: class atcoder is public, should be declared in a file named atcoder.java
public class atcoder{
       ^
1 error
Language: Java

import java.io.*
import java.util.*;
class Main
{
	public static void main(String[] args) throws Exception
    {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      	int n = Integer.parseInt(br.readLine());
      	String num = br.readLine();
      	while(num.length()!=1)
        {
        	char temp[] = new char[num.length()-1];
          	for(int i = 0 ; i < num.length()-1 ; i++)
            {
              int digit1 = Integer.parseInt(String.valueOf(num.charAt(i)));
              int digit2 = Integer.parseInt(String.valueOf(num.charAt(i+1)));
				              
              temp[i] = (char)(Math.abs(digit1-digit2)+'0');
            }
          num = new String(temp);
        }
        System.out.println(num);
    }
}

Compiler output:
Main.java:1: error: ';' expected
import java.io.*
                ^
1 error
Language: Java

import java.io.*;
import java.util.*;
class Main
{
	public static void main(String[] args)
    {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      	int n = Integer.parseInt(br.readLine());
      	String num = br.readLine();
      	while(num.length()!=1)
        {
        	char temp[] = new char[num.length()-1];
          	for(int i = 0 ; i < num.length()-1 ; i++)
            {
              int digit1 = Integer.parseInt(String.valueOf(num.charAt(i)));
              int digit2 = Integer.parseInt(String.valueOf(num.charAt(i+1)));
				              
              temp[i] = (char)(Math.abs(digit1-digit2)+'0');
            }
          num = new String(temp);
        }
        System.out.println(num);
    }
}

Compiler output:
Main.java:8: error: unreported exception IOException; must be caught or declared to be thrown
      	int n = Integer.parseInt(br.readLine());
      	                                    ^
Main.java:9: error: unreported exception IOException; must be caught or declared to be thrown
      	String num = br.readLine();
      	                        ^
2 errors
Language: C

#include<stdio.h>

void change(int* m,int r0,int r1,int c0,int c1){
	for(int i=r0-1;i<r1;i++){
		for(int j=c0-1;j<c1;j++){
			m[i][j]=(m[i][j]+1)%2;
		}
	}
}

int main(void){
	int h,w;
	scanf("%d",&h);
	scanf("%d",&w)'
	
	int m[100][100];
	char c;
	
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			scanf("%c",&c);
			if(c==#){
				m[i][j]=1;
			}else{
				m[i][j]=0;
			}
		}
	}
	
	
}

Compiler output:
main.c: In function 'change':
main.c:6:29: error: subscripted value is neither array nor pointer nor vector
    6 |                         m[i][j]=(m[i][j]+1)%2;
      |                             ^
main.c:6:38: error: subscripted value is neither array nor pointer nor vector
    6 |                         m[i][j]=(m[i][j]+1)%2;
      |                                      ^
main.c: In function 'main':
main.c:14:23: warning: missing terminating ' character
   14 |         scanf("%d",&w)'
      |                       ^
main.c:14:23: error: missing terminating ' character
main.c:14:23: error: expected ';' before 'int'
   14 |         scanf("%d",&w)'
      |                       ^
      |                       ;
   15 | 
   16 |         int m[100][100];
      |         ~~~            
main.c:22:31: error: stray '#' in program
   22 |                         if(c==#){
      |                               ^
main.c:22:32: error: expected expression before ')' token
   22 |                         if(c==#){
      |                                ^
main.c:23:33: error: 'm' undeclared (first use in this function)
   23 |                                 m[i][j]=1;
      |                                 ^
main.c:23:33: note: each undeclared identifier is reported only once for each function it appears in
Language: Java

class Main
{
	public static void main(String[] args)
    {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      	int n = Integer.parseInt(br.readLine());
      	String num = br.readLine();
      	while(num.length()!=1)
        {
        	char temp[] = new char[num.length()-1];
          	for(int i = 0 ; i < num.length()-1 ; i++)
            {
              int digit1 = Integer.parseInt(String.valueOf(num.charAt(i)));
              int digit2 = Integer.parseInt(String.valueOf(num.charAt(i+1)));
				              
              temp[i] = (char)(Math.abs(digit1-digit2)+'0');
            }
          num = new String(temp);
        }
        System.out.println(num);
    }
}

Compiler output:
Main.java:5: error: cannot find symbol
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	^
  symbol:   class BufferedReader
  location: class Main
Main.java:5: error: cannot find symbol
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	                        ^
  symbol:   class BufferedReader
  location: class Main
Main.java:5: error: cannot find symbol
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	                                           ^
  symbol:   class InputStreamReader
  location: class Main
3 errors
Language: C++

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

int max_len;

int loop(int n,int index,int value[max_len][max_len]){

    rep(i,n-1){
        value[index][i] = abs(value[index-1][i]-value[index-1][i+1]);
        //cout << index << " " << i << " " << value[index][i] << endl; 
    }

    if(n - 1 == 1) return value[index][0];
    else         loop(n-1,index+1,value);
}

int main() {

    int n;
    string a;
    cin >> n >> a;
  
    max_len = n;

    int alist[max_len][max_len];
    rep(i,n){
        alist[0][i] =  a.at(i) + '0';
    }

    int re = loop(n,1,alist);

    cout << re << endl;
}

Compiler output:
a.cc:8:45: error: size of array 'value' is not an integral constant-expression
    8 | int loop(int n,int index,int value[max_len][max_len]){
      |                                             ^~~~~~~
a.cc:8:36: error: size of array 'value' is not an integral constant-expression
    8 | int loop(int n,int index,int value[max_len][max_len]){
      |                                    ^~~~~~~
a.cc: In function 'int main()':
a.cc:32:23: error: cannot convert 'int (*)[max_len]' to 'int (*)[1]'
   32 |     int re = loop(n,1,alist);
      |                       ^~~~~
      |                       |
      |                       int (*)[max_len]
a.cc:8:30: note:   initializing argument 3 of 'int loop(int, int, int (*)[1])'
    8 | int loop(int n,int index,int value[max_len][max_len]){
      |                          ~~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc: In function 'int loop(int, int, int (*)[1])':
a.cc:16:22: warning: control reaches end of non-void function [-Wreturn-type]
   16 |     else         loop(n-1,index+1,value);
      |                  ~~~~^~~~~~~~~~~~~~~~~~~
Language: Java

class Main
{
	public static void main(String[] args)
    {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      	int n = Integer.parseInt(br.readLine());
      	String num = br.readLine();
      	while(num.length()!=1)
        {
        	char temp[] = new char[num.length()-1];
          	for(int i = 0 ; i < num.length()-1 ; i++)
            {
              int digit1 = Integer.parseInt(String.valueOf(num.charAt(i)));
              int digit2 = Integer.parseInt(String.valueOf(num.charAt(i+1)));
				              
              temp[i] = (char)(Math.abs(digit1-digit2)+'0');
            }
          num = new String(temp);
        }
        System.out.println(num);
        
    }
}

Compiler output:
Main.java:4: error: cannot find symbol
    {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
     ^
  symbol:   class BufferedReader
  location: class Main
Main.java:4: error: cannot find symbol
    {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                             ^
  symbol:   class BufferedReader
  location: class Main
Main.java:4: error: cannot find symbol
    {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                                                ^
  symbol:   class InputStreamReader
  location: class Main
3 errors
Language: C

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a[1000005],,b[1000005],i,n,j, k=1;
	
	scanf("%d", &n);
	for(i=0; i<n;i++){
		
		scanf("%d", &a[i]);
	}
  while(1){
    for(i=0; n-k; i++){
      b[i]=abs(a[i]-a[i+1]);
      a[i]=b[i];
    }
	k++;
  }
  printf("%d",a[0]);
  return 0;
	
}

Compiler output:
main.c: In function 'main':
main.c:5:20: error: expected identifier or '(' before ',' token
    5 |     int a[1000005],,b[1000005],i,n,j, k=1;
      |                    ^
main.c:7:22: error: 'n' undeclared (first use in this function)
    7 |         scanf("%d", &n);
      |                      ^
main.c:7:22: note: each undeclared identifier is reported only once for each function it appears in
main.c:8:13: error: 'i' undeclared (first use in this function)
    8 |         for(i=0; i<n;i++){
      |             ^
main.c:13:16: error: 'k' undeclared (first use in this function)
   13 |     for(i=0; n-k; i++){
      |                ^
main.c:14:7: error: 'b' undeclared (first use in this function)
   14 |       b[i]=abs(a[i]-a[i+1]);
      |       ^
Language: Java

import java.utol.*;
public class Main{
  public static void main(String args[])
  {
    Scanner in=new Scanner(System.in);
    long N=in.nextLong();
    int  a[]=new int[N];int f=0;
    for(i=0;i<N;i++)
    {
      a[i]=in.nextLong();
      
    }
    while(N==1)
    {
      for(i=0;i<N-1;i++)
      {
        f=0;
        a[i]=Math.abs(a[i]-a[i+1]);
        if(a[i]==0)
          f++;
      }
      if(f==N-1)
        break;
      N--;
      
    }
    System.out.println(a[0]);
  }
}

Compiler output:
Main.java:1: error: package java.utol does not exist
import java.utol.*;
^
Main.java:5: error: cannot find symbol
    Scanner in=new Scanner(System.in);
    ^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
    Scanner in=new Scanner(System.in);
                   ^
  symbol:   class Scanner
  location: class Main
Main.java:7: error: incompatible types: possible lossy conversion from long to int
    int  a[]=new int[N];int f=0;
                     ^
Main.java:8: error: cannot find symbol
    for(i=0;i<N;i++)
        ^
  symbol:   variable i
  location: class Main
Main.java:8: error: cannot find symbol
    for(i=0;i<N;i++)
            ^
  symbol:   variable i
  location: class Main
Main.java:8: error: cannot find symbol
    for(i=0;i<N;i++)
                ^
  symbol:   variable i
  location: class Main
Main.java:10: error: cannot find symbol
      a[i]=in.nextLong();
        ^
  symbol:   variable i
  location: class Main
Main.java:15: error: cannot find symbol
      for(i=0;i<N-1;i++)
          ^
  symbol:   variable i
  location: class Main
Main.java:15: error: cannot find symbol
      for(i=0;i<N-1;i++)
              ^
  symbol:   variable i
  location: class Main
Main.java:15: error: cannot find symbol
      for(i=0;i<N-1;i++)
                    ^
  symbol:   variable i
  location: class Main
Main.java:18: error: cannot find symbol
        a[i]=Math.abs(a[i]-a[i+1]);
          ^
  symbol:   variable i
  location: class Main
Main.java:18: error: cannot find symbol
        a[i]=Math.abs(a[i]-a[i+1]);
                        ^
  symbol:   variable i
  location: class Main
Main.java:18: error: cannot find symbol
        a[i]=Math.abs(a[i]-a[i+1]);
                             ^
  symbol:   variable i
  location: class Main
Main.java:19: error: cannot find symbol
        if(a[i]==0)
             ^
  symbol:   variable i
  location: class Main
15 errors
Language: Java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class go {
public static void main(String args[])
{
    try{
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int ar[]=new int[n];
        for(int i=0;i<n;i++)
        {
            ar[i]=sc.nextInt();
        }
        while(n>1)
        {
            for(int i=0;i<n-1;i++)
            {
                if(ar[i]>=ar[i+1])
                ar[i]=ar[i]-ar[i+1];
                else
                ar[i]=ar[i+1]-ar[i];
            }
            n--;
        }
        System.out.println(ar[0]);
    }
    catch(Exception e)
    {
        return;
    }
}
}

Compiler output:
Main.java:9: error: class go is public, should be declared in a file named go.java
public class go {
       ^
1 error
Language: Java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {
public static void main(String args[])
{
    try{
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int ar[]=new int[n];
        for(int i=0;i<n;i++)
        {
            ar[i]=sc.nextInt();
        }
        while(n>1)
        {
            for(int i=0;i<n-1;i++)
            {
                if(ar[i]>=ar[i+1])
                ar[i]=ar[i]-ar[i+1];
                else
                ar[i]=ar[i+1]-ar[i];
            }
            n--;
        }
        System.out.println(ar[0]);
    }
    catch(Exception e)
    {
        return;
    }
}
}

Compiler output:
Main.java:9: error: class Solution is public, should be declared in a file named Solution.java
public class Solution {
       ^
1 error
Language: Java

import java.util.Scanner;
 
public class Main
{
	public static void main(String[] args)
    {
     	 Scanner scan = new Scanner(System.in);
      	int val = Integer.parseInt(scan.nextInt());
      	String[] words = scan.nextLine().split("");
      	int[] nums = new int[val];
      	for(int i = 0; i < val; i++)
        {
         	 nums[i] = Integer.parseInt(words[i]);
        }
      
      	for(int i = val - 1; i > 0; i--)
        {
          	int[] saveNum = new int[i];
         	for(int j = 0; j < i; j++)
            {
             	 saveNum[j] = Math.abs(nums[j] - nums[j + 1]);
            }
          	nums = saveNum;
        }
      
      	System.out.println(nums[0]);
    }
}

Compiler output:
Main.java:8: error: incompatible types: int cannot be converted to String
      	int val = Integer.parseInt(scan.nextInt());
      	                                       ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error
Language: C

#include<stdio.h>
int main(){
int N;
  scanf("%d",&N);
  int a[N],x[N][N],b=0;
  for(int i=2;i<=N;i++){
  scanf("%d",&a[i]);
  }
  for(int i=2;i<=N;i++){
  	x[0][i]=a[i];
    }
  for(int i=2;i<=N-1;i++){
  	for(int j=1;j<N+1-i;j++){
    x[i][j]=x[i-1][j]-x[i-1][j+1];
    }
     printf("%d",x[i][j]);
  }
  
 
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:16:23: error: 'j' undeclared (first use in this function)
   16 |      printf("%d",x[i][j]);
      |                       ^
main.c:16:23: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <bits/stdc++.h>
#define mod 3
using namespace std;
int read();
int n;
char s[1000006];
int a[1000006];
void calc() {
    for (int i = 1; i < n; ++i) a[i] = abs(a[i] - a[i + 1]);
    --n;
}
int fac[1000006], caf[1000006], lim = 1000000;
void init() {
    fac[0] = 1;
    for (int i = 1; i <= lim; ++i) fac[i] = 1ll * fac[i - 1] * i % mod;
    caf[lim] = fsp(fac[lim], mod - 2);
    for (int i = lim; i >= 1; --i) caf[i - 1] = 1ll * caf[i] * i % mod;
}
int C(int x, int y) { return 1ll * fac[x] * caf[y] % mod * caf[x - y] % mod; }
void Add(int &x, int y) { (x += y) >= 3 ? x -= 3 : x; }

int C(int x, int y) { ; }

int main() {
    n = read(), scanf("%s", s + 1);
    for (int i = 1; i <= n; ++i) a[i] = s[i] - '0';
    if (n == 2) return calc(), printf("%d\n", a[1]), 0;
    calc(), calc();
    int res = 0;
    for (int i = 1; i <= n; ++i) Add(res, a[i] * C(n - 1, i - 1) % 3);
    printf("%d\n", res);
    return 0;
}

int read() {
    int x = 0, f = 1;
    char c = getchar();
    while (c < '0' || c > '9') f = (c == '-') ? -1 : f, c = getchar();
    while (c >= '0' && c <= '9') x = x * 10 + c - '0', c = getchar();
    return x * f;
}


Compiler output:
a.cc: In function 'void init()':
a.cc:16:16: error: 'fsp' was not declared in this scope
   16 |     caf[lim] = fsp(fac[lim], mod - 2);
      |                ^~~
a.cc: At global scope:
a.cc:22:5: error: redefinition of 'int C(int, int)'
   22 | int C(int x, int y) { ; }
      |     ^
a.cc:19:5: note: 'int C(int, int)' previously defined here
   19 | int C(int x, int y) { return 1ll * fac[x] * caf[y] % mod * caf[x - y] % mod; }
      |     ^
a.cc: In function 'int C(int, int)':
a.cc:22:25: warning: no return statement in function returning non-void [-Wreturn-type]
   22 | int C(int x, int y) { ; }
      |                         ^
Language: Java

import java.util.Scanner;
 
public class Test
{
	public static void main(String[] args)
    {
     	 Scanner scan = new Scanner(System.in);
      	int val = scan.nextInt();
      	String[] words = scan.nextLine().split("");
      	int[] nums = new int[val];
      	for(int i = 0; i < val; i++)
        {
         	 nums[i] = Integer.parseInt(words[i]);
        }
      
      	for(int i = val - 1; i > 0; i--)
        {
          	int[] saveNum = new int[i];
         	for(int j = 0; j < i; j++)
            {
             	 saveNum[j] = Math.abs(nums[j] - nums[j + 1]);
            }
          	nums = saveNum;
        }
      
      	System.out.println(nums[0]);
    }
}

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

import java.util.Scanner;
 
public class Test
{
	public static void main(String[] args)
    {
     	 Scanner scan = new Scanner(System.in);
      	int val = scan.nextInt();
      	String[] words = scan.nextLine().split("");
      	int[] nums = new int[val];
      	for(int i = 0; i < val; i++)
        {
         	 nums[i] = Integer.parseInt(words[i]);
        }
      
      	for(int i = val - 1; i > 0; i--)
        {
          	int[] saveNum = new int[i];
         	for(int j = 0; j < i; j++)
            {
             	 saveNum[j] = Math.abs(nums[j] - nums[j + 1]);
            }
          	nums = saveNum;
        }
      
      	System.out.println(num[0]);
    }
}

Compiler output:
Main.java:3: error: class Test is public, should be declared in a file named Test.java
public class Test
       ^
Main.java:26: error: cannot find symbol
      	System.out.println(num[0]);
      	                   ^
  symbol:   variable num
  location: class Test
2 errors
Language: Java

import java.util.Scanner;

public class Test
{
	public static void main(String[] args)
    {
     	 Scanner scan = new Scanner(System.in);
      	int val = scan.nextInt();
      	String[] words = scan.nextLine().split("");
      	int[] nums = new int[val];
      	for(int i = 0; i < val; i++)
        {
         	 nums[i] = Integer.parseInt(words[i]);
        }
      
      	for(int i = val - 1; i > 0; i--)
        {
          	int[] saveNum = new int[i];
         	for(int j = 0; j < i; j++)
            {
             	 saveNum[j] = Math.abs(nums[j] - nums[j + 1])
            }
          	nums = saveNum;
        }
      
      	System.out.println(num[0]);
    }
}

Compiler output:
Main.java:21: error: ';' expected
             	 saveNum[j] = Math.abs(nums[j] - nums[j + 1])
             	                                             ^
1 error
Language: C

#include<stdio.h>
int main(){
int N;
  scanf("%d",&N);
  int a[N],x[][],b=0;;
  for(int i=0;i<N;i++){
  scanf("%d",&a[i]);
  }
  for(int i=0;i<N;i++){
  	x[0][i]=a[i];
    }
  for(int i=1;i<N;i++){
  	for(int j=i+1;j<N;j++){
    x[i][j]=x[i-1][j-2]-x[i][j-1];
    }
    b++;
  }
  
  printf("%d",x[b][0]);
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:12: error: array type has incomplete element type 'int[]'
    5 |   int a[N],x[][],b=0;;
      |            ^
main.c:5:12: note: declaration of 'x' as multidimensional array must have bounds for all dimensions except the first
Language: C++

#include <bits/stdc++.h>
using namespace std;
int a,n;
vector < vector < int > > V; 
int main()
{
    cin>>n;
    while(cin>>a)
    v.push_back(a);
    if(v.size()<n)
    cout<<0;
    else
    cout<<v[n-1];
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'v' was not declared in this scope
    9 |     v.push_back(a);
      |     ^
a.cc:10:8: error: 'v' was not declared in this scope
   10 |     if(v.size()<n)
      |        ^