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

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pi> vpi;
typedef vector<vi> vvi;
const int inf = 0x3f3f3f3f;
const ll linf = 1234567890123456789;
const ll mod = 998244353;
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " = " << x << endl
#define sz(x) ((int)(x).size())

int h, w;
vector<string> s;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    cin >> h >> w;
    s = vector<string>(h);
    for(int i = 0; i < h; i++) cin >> s[i];
    priority_queue<tuple<int, int, int>> pq;
    pq.emplace(0-(s[0][0]=='#'), 0, 0);
    vvi visited(r, vi(c));
    while(sz(pq)){
        int dist, r, c;
        tie(dist, r, c) = pq.top();
        pq.pop();
        if(visited[r][c]) continue;
        visited[r][c] = 1;
        if(r == h-1 && c == w-1){
            cout << -dist << endl;
            return 0;
        }
        if(r != h-1) pq.emplace(dist-(s[r+1][c] != s[r][c] && s[r][c]=='.'), r+1, c);
        if(c != w-1) pq.emplace(dist-(s[r][c+1] != s[r][c] && s[r][c]=='.'), r, c+1);
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:17: error: 'r' was not declared in this scope
   30 |     vvi visited(r, vi(c));
      |                 ^
a.cc:30:23: error: 'c' was not declared in this scope
   30 |     vvi visited(r, vi(c));
      |                       ^
Language: C++

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

int main()
{
  int r,c;
  cin >> r >> c;
  char a[r][c];
  for(int i=0;i<r;i++)
  {
    for(int j=0;j<c;j++)
      cin>>a[i][j];
  }
  int c = 0 , i = 0 , j = 0;
   
  while(i < r && j < c)
  {
   //down
   if(a[i+1][j] == '#') 
   {
    c++;
     i = i+1;
     j = j;
   }
    //right
   else if(a[i][j+1] == '#')
   {
    c++;
     i=i;
     j=j+1;
   }
  }
  
  cout << c << endl;
      
 return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:7: error: redeclaration of 'int c'
   14 |   int c = 0 , i = 0 , j = 0;
      |       ^
a.cc:6:9: note: 'int c' previously declared here
    6 |   int r,c;
      |         ^
Language: C++

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
template<class T, class S>
ostream& operator << (ostream &o, const pair<T, S> &p) {
    return o << '(' << p.first << ", " << p.second << ')';
}
template<template<class, class...> class T, class... A>
typename enable_if<!is_same<T<A...>, string>(), ostream&>::type
operator << (ostream &o, T<A...> V) {
	o << '[';
	for(auto a : V) o << a << ", ";
	return o << ']';
}

typedef long long int ll;
typedef long double ld;
typedef pair<ll, ll> pl;

#define G(x) ll x; cin >> x;
#define GD(x) ld x; cin >> x;
#define GS(s) string s; cin >> s;
#define F(i, l, r) for(ll i = l; i < r; i++)
#define FD(i, r, l) for(ll i = r; i > l; i--)
#define P(a, n) { cout << "{ "; F(_, 0, n) cout << a[_] << " "; cout << "}" << endl; }
#define EX(x) { cout << x << endl; exit(0); }
#define K first
#define V second
#define M 1000000007 //998244353
#define N 110

ll dp[N][N];
string grid[N];

ll r(ll i, ll j) {
    if(dp[i][j] != -1) return dp[i][j];
    dp[i][j] = grid[i][j] == '#' ? 1 : 0;
    if(!i && !j) return dp[i][j];
    else if(!i) return dp[i][j] = dp[i][j] + r(i, j - 1);
    else if(!j) return dp[i][j] = dp[i][j] + r(i - 1, j);
    return dp[i][j] = dp[i][j] + min(r(i, j - 1), r(i - 1, j));
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    G(n) G(m) F(i, 0, n) cin >> grid[i];
    F(i, 0, n) fill(dp[i], dp[i] + N, -1);
    cout << r(n - 1, m - 1);
}

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

#include<bits/stdc++.h>
using namespace sdt;
int main()
{
	cout<<0;
	return 0;
 } 

Compiler output:
a.cc:2:17: error: 'sdt' is not a namespace-name
    2 | using namespace sdt;
      |                 ^~~
a.cc: In function 'int main()':
a.cc:5:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |         cout<<0;
      |         ^~~~
      |         std::cout
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
      |                  ^~~~
Language: C++

#include<iostream>
#include<stdio.h>//printf("%.9f\n",*********);
#include<vector>//文字列.erase(n)
#include<algorithm>//next_permutation
#include<set>
#include<string>//char(小文字-32=大文字) to_string
#include<sstream>
#include<complex>
#include<time.h>
#include<random>
#include<cmath>
#include<math.h>
#include<queue>
#include<time.h>
#include<iomanip>
#include<locale>
#include<utility>//swap
#define rt "\n"
#define rep(i,n) for(int i=0;i<n;i++)
#define rop(i,n) for(int i=1;i<=n;i++)
#define drep(i,n) for(int i=n-1;0<=i;i--)
#define drop(i,n) for(int i=n;0<i;i--)
#define yes(ans) if(ans)cout<<"yes"<<rt;else cout<<"no"<<rt;
#define Yes(ans) if(ans)cout<<"Yes"<<rt;else cout<<"No"<<rt;
#define YES(ans) if(ans)cout<<"YES"<<rt;else cout<<"NO"<<rt;
#define Yay(ans) if(ans)cout<<"Yay!"<<rt;else cout<<":("<<rt;
#define sec(a,b,ans) if(ans)cout<<a<<rt;else cout<<b<<rt;
#define vcin(s,n) rep(i,n)cin>>s[i];//vcin(配列名),(繰り返し回数)
#define sort(s) sort(s.begin(),s.end())//標準=昇順
#define reve(s) reverse(s.begin(),s.end())
#define asas int ans=0
#define str string
#define please return
#define AC 0
#define rapid_pleaseAC_fast cin.tie(0);ios::sync_with_stdio(false)
#define pi 3.1415926535897932384626
#define nine 1000000000

using namespace std;
typedef vector<int> vint;
typedef long double ldouble;
typedef vector<string> vstr;
typedef vector<char> vchar;
typedef vector<double> vdou;
typedef long long int llint;
typedef pair<int, int> pint;
typedef pair<llint, llint> pllint;
typedef vector<llint> vllint;
typedef vector<pint> vpint;
typedef vector<pair<llint, llint>> vpllint;
typedef vector<vector<int>> vvint;
typedef vector<vector<char>> vvchar;
typedef vector<vector<llint>> vvllint;
typedef vector<vector<string>> vvstr;
typedef vector<vector<bool>> vvbool;
typedef vector<vector<pint>> vvpint;
typedef vector<bool> vbool;

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

long long LCM(long long a, long long b) {
	return a * b / GCD(a, b);
}

unsigned GetDigit(unsigned num) {
	return std::to_string(num).length();
}

int tow(int n) {//2のn乗
	if (n == 0)return 1;
	int x = tow(n / 2);
	x *= x;
	if (n % 2 == 1)x *= 2;
	return x;//@domino
}

int keta(int n) {
	int sum = 0;
	while (n > 0) {
		sum += n % 10; n /= 10;
	}
	return sum;
}

/*

 (char)toupper(a[n])=文字列のn文字目を大文字で出力

  pow(a,b)=aのb乗

  */


int main(void) {

	CE

	please AC;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:99:9: error: 'CE' was not declared in this scope
   99 |         CE
      |         ^~
Language: C++

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

int main(){
  int N;cin>>N;
  vector<vector <int>> x(N,vector<int>(N));
  for(int i=0;i<N;i++){
    cin>>x.at(0).at(i);
  }
  for(int i=1;i<N;i++){
    for(int j=0;j<N-i+1;j++){
      x.at(i.j)=abs(x.at(i-1).at(j)-x.at(i-1).at(j+1));
    }
  }
  cout << x.at(N-1).at(0) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:14: error: request for member 'j' in 'i', which is of non-class type 'int'
   12 |       x.at(i.j)=abs(x.at(i-1).at(j)-x.at(i-1).at(j+1));
      |              ^
Language: C

#include <stdio.h>
#include <stdlib.h>

int main(void) {
  int n;
  scanf("%d", &n);
  int  x[1000001] = {0};
  char a[1000001] = {0};
  char *a = calloc(n + 1, sizeof(char));
  scanf("%s", a + 1);
  for(int i = 1;i <= n;i++) {
    x[i] = a[i] - '0';
  }
  for(int i = 2;i <= n;i++) {
    for(int j = 1;j <= n + 1 - i;j++) {
      x[j] = abs(x[j] - x[j+1]);
    }
  }
  printf("%d\n", x[1]);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:9:9: error: conflicting types for 'a'; have 'char *'
    9 |   char *a = calloc(n + 1, sizeof(char));
      |         ^
main.c:8:8: note: previous definition of 'a' with type 'char[1000001]'
    8 |   char a[1000001] = {0};
      |        ^
Language: Java

package atcoder.AGC_43;

import java.io.*;
import java.util.LinkedList;
import java.util.StringTokenizer;

public class _43_B {

    public static void main (String[] args) throws Exception {

        String s = "10\n" +
                "2311312312";

//        br = new BufferedReader(new StringReader(s));
        br = new BufferedReader(new InputStreamReader(System.in));
        bw = new BufferedWriter(new OutputStreamWriter(System.out));

        rl(); int N = nin();
        rl(); char[] ca = nca();

        int a[] = new int[N];
        for (int i=0; i<N; ++i) a[i] = ca[i]-48;

        while (N>1) {
            int j1=0, j2=0;
            int _N = N-1;
            while (j2 < _N) {
                int next = Math.abs(a[j2] - a[j2 + 1]);
                if (next == 0) {
                    j2++; N--;
                } else {
                    a[j1] = next;
                    j1++;
                    j2++;
                }
            }
            N--;
        }

        bw.write(Long.toString(N==0 ? 0 : a[0]));
        bw.newLine();
        bw.flush();
    }

    static BufferedReader br;
    static BufferedWriter bw;
    static StringTokenizer st;
    static void rl() throws Exception{
        st = new StringTokenizer(br.readLine());
    }
    static long nlo(){
        return Long.parseLong(st.nextToken());
    }
    static int nin(){
        return Integer.parseInt(st.nextToken());
    }
    /*private static void te(){
      }*/
    static double ndo(){
        return Double.parseDouble(st.nextToken());
    }
    static char[] nca(){
        return st.nextToken().toCharArray();
    }
    static String nstr(){
        return st.nextToken();
    }
}

Compiler output:
Main.java:7: error: class _43_B is public, should be declared in a file named _43_B.java
public class _43_B {
       ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{long long n;cin>>n;
 string s;cin>>s;
 long long ans=0;
 for(long long i=n-1;i>0;i--)
 {
 ans=abs(ans-abs(a[i]-a[i-1]));
 }
 cout<<ans;
 return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: 'a' was not declared in this scope
    9 |  ans=abs(ans-abs(a[i]-a[i-1]));
      |                  ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
typedef long long ll;
typedef long double ld;
const int inf=1e9+7;
const ll longinf=1LL<<60;
#define REP(i,m,n) for(int i=(int)(m) ; i < (int) (n) ; ++i )
#define rep(i,n) REP(i,0,n)
#define F first
#define S second
 
const int mx=1000010;
const ll mod=1e9+7;

template<typename T, size_t sz>
struct Combination{
  using ll = long long;
  array<T, sz> fact;

  T mod;
  Combination(T mod):mod(mod){init();}

  void init(){
    fact[0]=1;
    for(int i=1;i<(int)sz;i++)
      fact[i]=(ll)fact[i-1]*i%mod;
  }

  T mod_fact(T n,T& e){
    e=0;
    if(n==0) return 1;
    T res=mod_fact(n/mod,e);
    e+=n/mod;
    if(n/mod%2!=0)return res*(mod-fact[n%mod])%mod;
    return res*fact[n%mod]%mod;
  }

  T mod_comb(T n,T k){
    if(n==k||k==0) return 1;
    T e1,e2,e3;
    T a1=mod_fact(n,e1),a2=mod_fact(k,e2),a3=mod_fact(n-k,e3);
    if(e1>e2+e3) return 0;
    return a1*mod_inverse<ll>((ll)a2*a3%mod,mod)%mod;
  }
};

int main(){
  int n;
  cin >> n;
  string s;
  cin >> s;
  vector<int> as(n);
  rep(i,n) as[i]=s[i]-'1';

  Combination<int,mx> C(2);
  int is_one=0;
  for(int i=0;i<n;i++)
    if(as[i]&1) is_one^=C.mod_comb(n-1,i);

  if(is_one){
    cout<<1<<endl;
    return 0;
  }

  for(int i=0;i<n;i++){
    if(as[i]==1){
      cout<<0<<endl;
      return 0;
    }
    as[i]/=2;
  }

  int is_two=0;
  for(int i=0;i<n;i++)
    if(as[i]&1) is_two^=C.mod_comb(n-1,i);

  cout<<is_two*2<<endl;
  return 0;
  return 0;
}

Compiler output:
a.cc: In member function 'T Combination<T, sz>::mod_comb(T, T)':
a.cc:44:15: error: 'mod_inverse' was not declared in this scope
   44 |     return a1*mod_inverse<ll>((ll)a2*a3%mod,mod)%mod;
      |               ^~~~~~~~~~~
a.cc:44:29: error: expected primary-expression before '>' token
   44 |     return a1*mod_inverse<ll>((ll)a2*a3%mod,mod)%mod;
      |                             ^
Language: C++

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

int main(){
	cout<<2;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespacestd'
    2 | using namespacestd;
      |       ^~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:5:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |         cout<<2;
      |         ^~~~
      |         std::cout
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
      |                  ^~~~
Language: C++

#include<iostream>
# define ll long long 
using namespace std;
int main()
{
  ll n;
  cin>>n;
  vector<ll> v (n+1,0);
  for(ll i=1;i<=n;i++)
    cin>>v[i];
  
  vector< vector<ll> > dp(n,vector<ll>(n,0));
  for(int i=1;i<=n;i++)
      dp[1][i]=v[i];
  for(ll i=2;i<=4;i++)
  {
    for(ll j=1;j<=n-i+1;j++)
      dp[i][j]=abs(dp[i-1][j]-dp[i-1][j+1]);
  }
  cout<<dp[n][1]<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'vector' was not declared in this scope
    8 |   vector<ll> v (n+1,0);
      |   ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | # define ll long long
a.cc:2:13: error: expected primary-expression before 'long'
    2 | # define ll long long
      |             ^~~~
a.cc:8:10: note: in expansion of macro 'll'
    8 |   vector<ll> v (n+1,0);
      |          ^~
a.cc:10:10: error: 'v' was not declared in this scope
   10 |     cin>>v[i];
      |          ^
a.cc:2:13: error: expected primary-expression before 'long'
    2 | # define ll long long
      |             ^~~~
a.cc:12:18: note: in expansion of macro 'll'
   12 |   vector< vector<ll> > dp(n,vector<ll>(n,0));
      |                  ^~
a.cc:14:7: error: 'dp' was not declared in this scope
   14 |       dp[1][i]=v[i];
      |       ^~
a.cc:14:16: error: 'v' was not declared in this scope
   14 |       dp[1][i]=v[i];
      |                ^
a.cc:18:7: error: 'dp' was not declared in this scope
   18 |       dp[i][j]=abs(dp[i-1][j]-dp[i-1][j+1]);
      |       ^~
a.cc:20:9: error: 'dp' was not declared in this scope
   20 |   cout<<dp[n][1]<<endl;
      |         ^~
Language: C++

#include<iostrem>
# define ll long long 
using namespace std;
int main()
{
  ll n;
  cin>>n;
  vector<ll> v (n+1,0);
  for(ll i=1;i<=n;i++)
    cin>>v[i];
  
  vector< vector<ll> > dp(n,vector<ll>(n,0));
  for(int i=1;i<=n;i++)
      dp[1][i]=v[i];
  for(ll i=2;i<=4;i++)
  {
    for(ll j=1;j<=n-i+1;j++)
      dp[i][j]=abs(dp[i-1][j]-dp[i-1][j+1]);
  }
  cout<<dp[n][1]<<endl;
  return 0;
}

Compiler output:
a.cc:1:9: fatal error: iostrem: No such file or directory
    1 | #include<iostrem>
      |         ^~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
#define ld double
#define ull unsigned long long
#define ll long long
#define pii pair <int, int>
#define iiii pair <int, pii >
#define mp make_pair
#define INF 1000000000
#define MOD 1000000007
#define rep(i, x) for(int (i) = 0; (i) < (x); (i)++)
inline int getint() {
  int x = 0, p = 1; char c = getchar();	
  while (c <= 32) c = getchar();
  if (c == 45) p = -p, c = getchar();
  while (c > 32) x = x * 10 + c - 48, c = getchar();
  return x * p;
}
using namespace std;
//ruogu_alter
const int N = 1e6 + 5;
int fac[N];
//
int c(int x, int y) { return fac[x] - fac[y] - fac[x - y] == 0; }
int main() {
  int n = getint();
  vector<int> a;
  scanf("%s", s);
  int pre = -1;
  rep(i, n - 1) a.emplace_back(abs(s[i] - s[i + 1]));
  for (int i = 1; i < N; i++) fac[i] = fac[i - 1] + __builtin_ctz(i);
  int res = 0;
  rep(i, a.size()) res ^= ((a[i] & 1) * c(a.size() - 1, i)) & 1;
  if (res) return !printf("%d\n", 1);
  if (n > 1000) return !printf("%d\n", 0);
  while (a.size() > 1) {
    vector<int> b;
    rep(i, a.size() - 1) b.emplace_back(abs(b[i] - b[i + 1]));
    a = b;
  }
  cout << a[0] << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:15: error: 's' was not declared in this scope
   27 |   scanf("%s", s);
      |               ^
Language: C++

#include <bits/stdc++.h>
#define ld double
#define ull unsigned long long
#define ll long long
#define pii pair <int, int>
#define iiii pair <int, pii >
#define mp make_pair
#define INF 1000000000
#define MOD 1000000007
#define rep(i, x) for(int (i) = 0; (i) < (x); (i)++)
inline int getint() {
  int x = 0, p = 1; char c = getchar();	
  while (c <= 32) c = getchar();
  if (c == 45) p = -p, c = getchar();
  while (c > 32) x = x * 10 + c - 48, c = getchar();
  return x * p;
}
using namespace std;
//ruogu_alter
//
int main() {
  n = getint();
  if (n > 1000) {
    printf("%d\n", 0);
    return 0;
  }
  assert(false);
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:3: error: 'n' was not declared in this scope; did you mean 'yn'?
   22 |   n = getint();
      |   ^
      |   yn
Language: C++

//{{{
#include<algorithm>
#include<cmath>
#include<deque>
#include<fstream>
#include<iomanip>
#include<iostream>
#include<map>
#include<numeric>
#include<queue>
#include<random>
#include<set>
#include<sstream>
#include<sys/time.h>
#include<unordered_map>
#include<unordered_set>
#include<vector>
using ll = long long;
enum : int { M = (int)1e9 + 7 };
enum : ll { MLL = (ll)1e18L + 9 };
using namespace std;
#ifdef LOCAL
#include"rprint2.hpp"
#else
#define FUNC(name) template <ostream& out = cout, class... T> void name(T&&...){ }
FUNC(printde) FUNC(printdbe) FUNC(printdwe) FUNC(printdu);
#endif
template <template <class T, class = std::allocator<T>> class V, class E>
istream& operator >> (istream& in, V<E>& v){ for(auto& e : v){ in >> e; } return in; }
//}}}

int main(){
    cin.tie(0); ios::sync_with_stdio(false);
    int n; cin >> n;

    vector<int> as(n);
    for(int i = 0; i < n; i++){
        char c; cin >> c;
        as[i] = c - '0';
    }
    for(int i = 0; i < n - 1; i++){
        as[i] = abs(as[i] - as[i + 1]);
    }
    as.pop_back();
    n--;

    if(n < 50){
        while(n > 1){
            for(int i = 0; i < n - 1; i++){
                as[i] = abs(as[i] - as[i + 1]);
            }
            as.pop_back();
            n--;
        }
        cout << as[0] << '\n';
        return;
    }

    bool one = false;
    for(auto& a : as){
        one |= a == 1;
    }
    if(one){
        for(auto& a : as){
            a = a == 1 ? 1 : 0;
        }
    }else{
        for(auto& a : as){
            a /= 2;
        }
    }
    printde(as);

    int a = 0;
    auto cntBit = [&](int num){ 
        int bit = 1;
        for(int i = 0; ; i++){
            if(bit & num){
                return i;
            }
            bit <<= 1;
        }
    };
    int twos = 0;
    for(int i = 0; i < n; i++){
        if(i){
            twos -= cntBit(i);
            twos += cntBit(n - i);
        }
        a += as[i] * (twos == 0);
        // a += as[i] * (i & 1 ? n - 1 : 1);
    }
    a &= 1;
    cout << (one ? a : a * 2) << '\n';
}


Compiler output:
a.cc: In function 'int main()':
a.cc:56:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
   56 |         return;
      |         ^~~~~~
Language: C++

//{{{
#include<algorithm>
#include<cmath>
#include<deque>
#include<fstream>
#include<iomanip>
#include<iostream>
#include<map>
#include<numeric>
#include<queue>
#include<random>
#include<set>
#include<sstream>
#include<sys/time.h>
#include<unordered_map>
#include<unordered_set>
#include<vector>
using ll = long long;
enum : int { M = (int)1e9 + 7 };
enum : ll { MLL = (ll)1e18L + 9 };
using namespace std;
#ifdef LOCAL
#include"rprint2.hpp"
#else
#define FUNC(name) template <ostream& out = cout, class... T> void name(T&&...){ }
FUNC(printde) FUNC(printdbe) FUNC(printdwe) FUNC(printdu);
#endif
template <template <class T, class = std::allocator<T>> class V, class E>
istream& operator >> (istream& in, V<E>& v){ for(auto& e : v){ in >> e; } return in; }
//}}}

int main(){
    cin.tie(0); ios::sync_with_stdio(false);
    int n; cin >> n;

    vector<int> as(n);
    for(int i = 0; i < n; i++){
        char c; cin >> c;
        as[i] = c - '0';
    }
    for(int i = 0; i < n - 1; i++){
        as[i] = abs(as[i] - as[i + 1]);
    }
    as.pop_back();
    n--;

    if(n < 50){
        while(n > 1){
            for(int i = 0; i < n - 1; i++){
                as[i] = abs(as[i] - as[i + 1]);
            }
            as.pop_back();
            n--;
        }
        cout << as[0] << '\n';
    }

    bool one = false;
    for(auto& a : as){
        one |= a == 1;
    }
    if(one){
        for(auto& a : as){
            a = a == 1 ? 1 : 0;
        }
    }else{
        for(auto& a : as){
            a /= 2;
        }
    }
    printde(as);

    int a = 0;
    auto cntBit = [&](int num){ 
        int bit = 1;
        for(int i = 0; ; i++){
            if(bit & num){
                return i;
            }
            bit <<= 1;
        }
    };
    int twos = 0;
    for(int i = 0; i < n; i++){
        if(i){
            twos -= cntBit(i);
            twos += cntBit(n - i);
        }
        a += as[i] * (twos == 0);
        // a += as[i] * (i & 1 ? n - 1 : 1);
    }
    a &= 1;
    cout << (one ? a : a * 2) << '\n';



Compiler output:
a.cc: In function 'int main()':
a.cc:93:39: error: expected '}' at end of input
   93 |     cout << (one ? a : a * 2) << '\n';
      |                                       ^
a.cc:32:11: note: to match this '{'
   32 | int main(){
      |           ^
Language: C++

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

signed main(){
  int n;cin>>n;
  string s;cin>>s;
  int a=2,od=0;
  for(int i=0;i<n;i++)if(s[i]=='2')a=1;
  for(int i=0;i<n;i++){
    if(a==1&&s[i]=='3')s[i]='1';
    if(a==2&&s[i]=='3')s[i]='2';
  }
  for(int i=0;i<n;i++)if(s[i]=='2')od^=((n-1)&i)==i
  cout<<od*a<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:52: error: expected ';' before 'cout'
   13 |   for(int i=0;i<n;i++)if(s[i]=='2')od^=((n-1)&i)==i
      |                                                    ^
      |                                                    ;
   14 |   cout<<od*a<<endl;
      |   ~~~~
Language: C++

//Let's join Kaede Takagaki Fun Club !!
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> P1;
typedef pair<P,P> P2;
#define pu push
#define pb push_back
#define mp make_pair
#define eps 1e-7
#define INF 1000000000
#define fi first
#define sc second
#define rep(i,x) for(int i=0;i<x;i++)
#define repn(i,x) for(int i=1;i<=x;i++)
#define SORT(x) sort(x.begin(),x.end())
#define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end())
#define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())
#define all(x) x.begin(),x.end()
template<class T>
void dmp(T a){
	rep(i,a.size()) cout << a[i] << " ";
	cout << endl;
}
template<class T>
bool chmax(T&a, T b){
	if(a < b){
		a = b;
		return 1;
	}
	return 0;
}
template<class T>
bool chmin(T&a, T b){
	if(a > b){
		a = b;
		return 1;
	}
	return 0;
}
template<class T>
void g(T &a){
	cin >> a;
}
template<class T>
void o(const T &a,bool space=false){
	cout << a << (space?' ':'\n');
}
//ios::sync_with_stdio(false);
const ll mod = 1000000007;//998244353
template<class T>
void add(T&a,T b){
	a+=b;
	if(a >= mod) a-=mod;
}

int n,a[1000005];
string f;

ll C(int a,int b){
	if( (a&b) == b ) return 1;
	else return 0;
}

int main(){
	ios::sync_with_stdio(false);
	g(n); g(f);
	repn(i,n) a[i] = f[i-1] - '0';
	
	make();
	ll ans = 0;
	ll ans2 = 0;
	bool ex = 0;
	for(int i=0;i<n-1;i++){
		int v = a[i+2] - a[i+1];
		v = abs(v);
		
		ans += v * C(n-2, i);
		ans %= 2;
		if(v%2 == 1) ex = 1;
		else{
			ans2 += (v/2) * C(n-2, i);
			ans2 %= 2;
		}
	}
	if(ans == 1) puts("1");
	else if(ex) puts("0");
	else puts(ans2?"2":"0");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:77:9: error: 'make' was not declared in this scope
   77 |         make();
      |         ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

#define COUT(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << endl
template<class T1, class T2> ostream& operator << (ostream &s, pair<T1,T2> P)
{ return s << '<' << P.first << ", " << P.second << '>'; }
template<class T> ostream& operator << (ostream &s, vector<T> P)
{ for (int i = 0; i < P.size(); ++i) { if (i > 0) { s << " "; } s << P[i]; } return s; }
template<class T> ostream& operator << (ostream &s, vector<vector<T> > P)
{ for (int i = 0; i < P.size(); ++i) { s << endl << P[i]; } return s << endl; }
template<class T> ostream& operator << (ostream &s, set<T> P)
{ for(auto it : P) { s << "<" << it << "> "; } return s << endl; }
template<class T1, class T2> ostream& operator << (ostream &s, map<T1,T2> P)
{ for(auto it : P) { s << "<" << it.first << "->" << it.second << "> "; } return s << endl; }


const int MAX = 1100000;
vector<long long> cnt; // cnt[n] := n! が 2 で何回割れるか
void pre() {
    cnt.assign(MAX, 0);
    for (int i = 1; i < MAX; ++i) {
        int j = i;
        int add = 0;
        while (j % 2 == 0) ++add, j /= 2;
        cnt[i] = cnt[i-1] + add;
    }
}

int solve(const string &S) {
    vector<int> a;
    for (int i = 0; i + 1 < N; ++i) {
        int x = S[i] - '0';
        int y = S[i+1] - '0';
        a.push_back(abs(x - y));
    }

    if (a.size() == 1) return a[0];
    N = (int)a.size() - 1;
    long long parity = 0;
    for (int i = 0; i < a.size(); ++i) {
        long long ex = cnt[N] - cnt[i] - cnt[N-i];
        if (ex > 0) continue;
        parity += a[i];
    }

    if (parity & 1) return 1;
    else {
        bool exist_one = false;
        for (int i = 0; i < a.size(); ++i) if (a[i] == 1) exist_one = true;
        if (exist_one) return 0;
        else {
            parity = 0;
            for (int i = 0; i < a.size(); ++i) {
                long long ex = cnt[N] - cnt[i] - cnt[N-i];
                if (ex > 0) continue;
                parity += a[i] / 2;
            }
            if (parity & 1) return 2;
            else return 0;
        }
    }
}

int main() {
    int N;
    string S;
    cin >> N >> S;
    cout << solve(S) << endl;
}

Compiler output:
a.cc: In function 'int solve(const std::string&)':
a.cc:33:29: error: 'N' was not declared in this scope
   33 |     for (int i = 0; i + 1 < N; ++i) {
      |                             ^
a.cc:40:5: error: 'N' was not declared in this scope
   40 |     N = (int)a.size() - 1;
      |     ^
Language: C++

#include<bits/stdc++.h>
char s[1000010];

inline int C(int n, int m) { return (n & m) == m; }

int main() {
    int n;
    scanf("%d%s", &n, s + 1);
    if(n == 1) putchar(s[1]), puts("");
    else {
        --n;
        int find1 = 0;
        for(int j = 1; j <= n; j++)
            s[j] = abs(s[j] - s[j + 1]), find1 |= s[j] == 1;
        if(!find1) for(int i = 1; i <= n; i++) s[i] >>= 1;
        find1 ^= 1;
        int t = 0;
        for(int j = 1; j <= n; j++) t ^= C(n - 1, j - 1) * (s[j] & 1);
        cout << (int(t) << find1) << endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   19 |         cout << (int(t) << find1) << endl;
      |         ^~~~
      |         std::cout
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:19:38: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   19 |         cout << (int(t) << find1) << endl;
      |                                      ^~~~
      |                                      std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <bits/stdc++.h>

using std::pair;
const int N = 1e6 + 5;
int n, tot; 

int main()
{
	scanf("%d%s", &n, s);
	--n;
	for (int i = 0; i <= n; ++i)
		a[i] = s[i] - '0';
	for (int i = 0; i <= n; ++i)
		if ((n & i) == i)
			tot = tot + a[i] & 1;
	if (tot)
		puts("1");
	else
	{
		bool flag = false;
		for (int i = 0; i <= n; ++i)
			if (a[i] == 1)
			{
				puts("0");
				flag = true;
				break ;
			}
		if (!flag)
		{
			tot = 0;
			for (int i = 0; i <= n; ++i)
				if ((n & i) == i)
					tot = tot + (a[i] >> 1) & 1;
			printf("%d\n", tot);
		}
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:27: error: 's' was not declared in this scope
    9 |         scanf("%d%s", &n, s);
      |                           ^
a.cc:12:17: error: 'a' was not declared in this scope
   12 |                 a[i] = s[i] - '0';
      |                 ^
a.cc:15:37: error: 'a' was not declared in this scope
   15 |                         tot = tot + a[i] & 1;
      |                                     ^
a.cc:22:29: error: 'a' was not declared in this scope
   22 |                         if (a[i] == 1)
      |                             ^
a.cc:33:54: error: 'a' was not declared in this scope
   33 |                                         tot = tot + (a[i] >> 1) & 1;
      |                                                      ^
Language: C++

#include<bits/stdc++.h>
using namespace std;int N,i,v,k;char c;main(){for(cin>>N,N--;i<=N;cin>>c,v+=((N&i)==i)*--c),k|=c,i++);v&=3;cout<<(v&1?1:k&1?0:v);}

Compiler output:
a.cc:2:40: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | using namespace std;int N,i,v,k;char c;main(){for(cin>>N,N--;i<=N;cin>>c,v+=((N&i)==i)*--c),k|=c,i++);v&=3;cout<<(v&1?1:k&1?0:v);}
      |                                        ^~~~
a.cc: In function 'int main()':
a.cc:2:92: error: expected primary-expression before ',' token
    2 | using namespace std;int N,i,v,k;char c;main(){for(cin>>N,N--;i<=N;cin>>c,v+=((N&i)==i)*--c),k|=c,i++);v&=3;cout<<(v&1?1:k&1?0:v);}
      |                                                                                            ^
Language: C++

#include<bits/stdc++.h>
#include<ios>
#include<limits>
using namespace std;
int main(){
	int n;
	cin>>n;
	cin>>ws
	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:8:16: error: expected ';' before 'string'
    8 |         cin>>ws
      |                ^
      |                ;
    9 |         string s;
      |         ~~~~~~  
a.cc:10:21: error: 's' was not declared in this scope
   10 |         getline(cin,s);
      |                     ^
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < n; ++i)
#define rrep(i, n) for(int i = n-1; i >= 0; --i)
#define fi first
#define se second
using namespace std;
using lint = long long;
using uint = unsigned int;
using ulint = unsigned long long;
using ldouble = long double;
using pii = pair<int, int>;
using pli = pair<lint, lint>;
using pdd = pair<double, double>;
using pld = pair<ldouble, ldouble>;
using v1i = vector<int>;
using v1li = vector<lint>;
using v2i = vector<vector<int>>;
using v2li = vector<vector<lint>>;
using v3i = vector<vector<vector<int>>>;
using v3li = vector<vector<vector<lint>>>;
using v1b = vector<bool>;
using v2b = vector<vector<bool>>;
using v3b = vector<vector<vector<bool>>>;
using v1c = vector<char>;
using v2c = vector<vector<char>>;
using v3c = vector<vector<vector<char>>>;
constexpr lint mod1 = 1e9+7;
constexpr lint mod2 = 998244353;

int main() {
  int n, a = 0, b;
  string s;
  cin >> n >> s;
  b = s[i] - '0';
  rep(i, n-1){
    if(s[i-1]%2 != s[i]%2){
      ++a;
      b += pow(-1, a)*abs(s[i-1]-s[i]);
    }
  }
  cout << b << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:9: error: 'i' was not declared in this scope
   34 |   b = s[i] - '0';
      |         ^
Language: C++

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

int main() {
  int n;
  string a;
  cin>>n>>a;
  
  vector<int> data(n);
  for (int i = 0; i < n; i++){
   data.at(i)=a.at(i)
  }

  for(int i=1; i<n;i++){
    
    for(int j=0; j<n-i;j++){
      data.at(j)=data.at(j)-data.at(j+1);
      if(data.at(j)<0)
        data.at(j)*=-1;

    }
  }

  cout<<data.at(0)<<endl;                
                           
                           
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:22: error: expected ';' before '}' token
   11 |    data.at(i)=a.at(i)
      |                      ^
      |                      ;
   12 |   }
      |   ~
Language: C++

//#define _GLIBCXX_DEBUG

#include<bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
const int INF= 1e9+5;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vector<ll> >vvl;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> T;
const ll MOD=1000000007LL;
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main(){
  ll n;cin>>n;
  string s;cin>>s;
  vl a(n);
  rep(i,n){
    a[i]=s[i]-'0';
  }
  ll three=0;
  ll two=0;
  ll one=0;
  rep(i,n){
    if(a[i]==3)three++;
    if(a[i]==2)two++;
    if(a[i]==1)one++;
  }
  vl b(n-1);
  rep(i,n-1)b[i]=(a[i+1]-a[i])/2;
  if(two==0 ){
    ll ans=0;
    rep(i,n-1){
      ll t=0;
      rep(k,70){
        if(!(1<<k &n-2)&&(1<<k&i))part=0;
      }
      ans+=t;
      if(ans%2==1){
        cout<<2<<endl;
        return 0;
      }
    }
  }
  ll count=0;
  rep(i,n){
    if(a[i]==2)continue;
    ll part=1;
    rep(k,70){
      if(!(1<<k &n-1)&&(1<<k&i))part=0;
    }
    count+=part;
  }
  if(count%2==1){
    cout<<1<<endl;
    return 0;
  }
  cout<<0<<endl;
  return 0;
}
      
    
    
    

Compiler output:
a.cc: In function 'int main()':
a.cc:39:35: error: 'part' was not declared in this scope
   39 |         if(!(1<<k &n-2)&&(1<<k&i))part=0;
      |                                   ^~~~
Language: Java

import java.util.Scanner;

/*
H  行 W 列のマス目を考えます。上から r 番目、左から c 番目のマスを(r,c) と表すことにします。
全てのマスはそれぞれ白か黒のどちらかの色に塗られています。

次のような経路が存在するとき、このマス目を"良い"状態と呼びます。

常に白いマスの上にいながら、(1,1) から、一つ 右か下 のマスに移動することを繰り返し、 
(H,W) へ移動する。
ここで、"良い"状態ならば (1,1) や(H,W) が必ず白いことに注意してください。

あなたの仕事は、以下の操作を繰り返し、マス目を"良い"状態にすることです。最小で何回操作を行う必要があるか求めてください。なお、有限回の操作で必ず"良い"状態に出来ることが証明可能です。

4 つの整数 r0,c0,r1,c1(1≤r0≤r1≤H,1≤c0≤c1≤W) を選ぶ。
r0≤r≤r1,c0≤c≤c1 を満たす全てのr,c について、(r,c) の色を変更する。
つまり、白色ならば黒色にし、黒色ならば白色にする。
*/

public class Main {
    public static void main(String[] args){

        Scanner s = new Scanner(System.in);
        int h = s.nextInt();
        String w = s.next();

        int[] temp = new int[h];

        String []resultArray = w.split("");

        for(int i = 0; i < resultArray.length; i++){
            temp[i] = Integer.parseInt(resultArray[i]);
        }

        System.out.println(list(temp));
    }

    public static int list(int[] list) {
        int temp[] = new int[list.length - 1];

        if (list.length != 1) {
            for (int i = 0; i < list.length; i++) {
                temp[i] = Math.abs(list[i] - list[i + 1]);
            }
        } else {
            return list[0];
        }
    } 
}

Compiler output:
Main.java:48: error: missing return statement
    } 
    ^
1 error
Language: C++

#include<iostream>
using namespace std;
const int N=1e6+5;

int n,sum;
string s;
int a[N];
int dp[N][N];
int po[N],head[N],tail[N];
bool ok[N];

bool func1()
{
	for(int i=1;i<=n;i++)
		if(a[i]==2) return 0;
	int cnt=0;
	for(int i=1;i<n;i++)
		if(a[i]+a[i+1]==4) cnt++;
	return cnt&1;
}

int main()
{
	cin>>n>>s;
	for(int i=1;i<=n;i++)
		a[i]=s[i-1]-'0';
	if(n<=10000)
	{
		for(int i=1;i<=n;i++)
			cout<<a[i]<<' ';cout<<'\n';
		for(int i=1;i<=n;i++)
			dp[1][i]=a[i];
		for(int i=2;i<=n;i++)
		for(int j=1;j<=n-i+1;j++)
			dp[i][j]=abs(dp[i-1][j]-dp[i-1][j+1]);
		cout<<dp[n][1];
		return 0;
	}
	if(func1()) return cout<<"2\n",0;
	for(int i=1;i<=n;i++)
	{
		int x=i;
		while(x%2==0)
			x/=2,po[i]++;
	}
	for(int i=1;i<=n;i++)
		head[i]=head[i-1]+po[i];
	for(int i=1;i<=n;i++)
		tail[i]=tail[i-1]+po[n-i];
	for(int i=1;i<=n;i++)
		ok[i]=(tail[i-1]==head[i-1]);
	for(int i=1;i<=n;i++)
		if(ok[i]) sum+=a[i];
	if(sum&1) cout<<"1\n";
	else cout<<"0\n";
	
	//for(int i=1;i<=n;i++)
	//	cout<<po[i]<<' ';
	//cout<<'\n';
	//for(int i=1;i<=n;i++)
	//	cout<<head[i]<<' ';
	//cout<<'\n';
	//for(int i=1;i<=n;i++)
	//	cout<<tail[i]<<' ';
	
	return 0;
}

Compiler output:
/tmp/ccPuBmgF.o: in function `main':
a.cc:(.text+0x34c): relocation truncated to fit: R_X86_64_PC32 against symbol `po' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x366): relocation truncated to fit: R_X86_64_PC32 against symbol `po' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x3a2): relocation truncated to fit: R_X86_64_PC32 against symbol `head' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x3b9): relocation truncated to fit: R_X86_64_PC32 against symbol `po' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x3d3): relocation truncated to fit: R_X86_64_PC32 against symbol `head' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x405): relocation truncated to fit: R_X86_64_PC32 against symbol `tail' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x422): relocation truncated to fit: R_X86_64_PC32 against symbol `po' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x43c): relocation truncated to fit: R_X86_64_PC32 against symbol `tail' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x46e): relocation truncated to fit: R_X86_64_PC32 against symbol `tail' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x488): relocation truncated to fit: R_X86_64_PC32 against symbol `head' defined in .bss section in /tmp/ccPuBmgF.o
a.cc:(.text+0x49c): additional relocation overflows omitted from the output
collect2: error: ld returned 1 exit status
Language: C++

#include<iostream>
#include<vector>
#include<map>

using namespace std;


int main() {
	int n;
	cin >> n;
	vector<int> a(n);
	string s;
	cin >> s;
	for (int i = 0; i < n; i++) {
		a[i] = int(s[i]);
	}
	for (int i = 0; i < n-1; i++) {
		for (int j = 0; j < n - i - 1; j++) {
			a[j] = abs(a[j] - a[j + 1]);
		}
	}

	cout << a[0] << endl;
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:24:18: error: expected '}' at end of input
   24 |         return 0;
      |                  ^
a.cc:8:12: note: to match this '{'
    8 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
typedef long long ll;
typedef long double ld;
const int inf=1e9+7;
const ll longinf=1LL<<60;
#define REP(i,m,n) for(int i=(int)(m) ; i < (int) (n) ; ++i )
#define rep(i,n) REP(i,0,n)
#define F first
#define S second
 
#define bit(n,k) ((n>>k)&1) //*n no k bit me 1 or 0*/

const int mx=1000010;
const ll mod=2;

vector<ll> inv,fact,invfact;
void mod_build(int n){  
  fact.resize(n+1); inv.resize(n+1); invfact.resize(n+1);
  fact[0]=inv[0]=invfact[0]=1; inv[1]=1;
  rep(i,n){
    fact[i+1]=fact[i]*(i+1)%mod;
    if(i>0)inv[i+1]=mod-inv[mod%(i+1)]*(mod/(i+1))%mod;
    invfact[i+1]=invfact[i]*inv[i+1]%mod;
  }
}
ll perm(int n,int k){ if(n<0||k<0||k>n){ return 0; } else { return fact[n]*invfact[n-k]%mod; } }
ll comb(int n,int k){ if(n<0||k<0||k>n){ return 0; } else { return (fact[n]*invfact[n-k]%mod)*invfact[k]%mod; }}
ll modpow(ll n,ll k){
  k%=mod-1; if(k<0)k+=mod-1;
  ll ret=1; while(k){ if(k&1)ret=ret*n%mod; n=n*n%mod; k>>=1; }
  return ret;
}
ll modinv(ll a){ return modpow(a, mod-2); }

int main(){
  mod_build(mx);
  int n; 
  string s; 
  cin >> n >> s;
  vector<int> a(n);
  rep(i,n) a[i]=(int)(s[i]-'0');

  for(int i=0; i<min(5,n-1); i++){
    int k = a.size();
    for(int j=0; j<k-1; j++){
      a[j] = abs(a[j]-a[j+1]);
    }
    a.pop_back();
  }

  int m = a.size();
  if(m==1){ cout << a[0] << endl; return 0; }

  int cnt1=0, cnt2=0;
  bool flag = true;
  rep(i,m){
    if(a[i]==1){
      if(comb(m-1,i)==1){
        cnt1++;
      }
      flag = false;
    }
    if(a[i]==2){
      if(comb(m-1,i)==1){
        cnt2++;
      }
    }
  }
  if(flag){
    cout << a[0]^a[m-1] << endl;  
    return 0;  
  }
  cout << cnt1%2 << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:72:25: error: invalid operands of types '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and '<unresolved overloaded function type>' to binary 'operator<<'
   72 |     cout << a[0]^a[m-1] << endl;
Language: C++

#include<iostream>
#include<vector>
#include<map>
using namespace std;
 
int main(){
  int N;
  cin >> N;
 
  string a;
  cin >> a;
 
  for(auto& c: a){
    c -= 1;
  }
 
  bool has_1 = any_of(a.begin(), a.end(),
                      [](char c){return c == '1'; });
  vector<int> two_cnt(N);
  two_cnt[0] = 0;
  for(int k = 1; k <= N - 1; k++){
    int two_cnt_diff = 0;
    int up = N - 1 - k + 1;
    while(up % 2 == 0){
      up /= 2;
      two_cnt_diff++;
    }
    int down = k;
    while(down % 2 == 0){
      down /= 2;
      two_cnt_diff--;
    }
    two_cnt[k] = two_cnt[k - 1] + two_cnt_diff;
  }
  if(has_1){ // 0 or 1
    for(auto& c: a){
      if(c == '2'){
        c = '0';
      }
    }
  }else{ // 0 or 2
    for(auto& c: a){
      if(c == '2'){
        c = '1';
      }
    }
  }
  bool one = false;
  for(int i = 0; i < N; i++){
    if(a[i] == '1' && two_cnt[i] == 0){
      one = !one;
    }
  }
  if(has_1 && one){
    cout << 1 << endl;
  }else if(one){
    cout << 2 << endl;
  }else{
    cout << 0 << endl;
  }
 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:16: error: 'any_of' was not declared in this scope
   17 |   bool has_1 = any_of(a.begin(), a.end(),
      |                ^~~~~~
Language: C++

#include<bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;
typedef vector<int> vi;
typedef vector< vi > vvi;
typedef pair<int, int> pii;  // pair<int, int> に pii という別名を付ける
typedef long long ll;

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int N;
	vi a(N);
	rep(i, N){
		cin >> a.at(i);
	}
	int sum;
	rep(i,N){
		sum += a.at(i);
	}
	if (sum%3 == 0&& sum%2 == 0 && sum%5 = 0){
		cout << 0 << endl;
	}
	else{
		cout << 1 << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:37: error: lvalue required as left operand of assignment
   21 |         if (sum%3 == 0&& sum%2 == 0 && sum%5 = 0){
      |             ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int a[4];
int b[1000002];
char s[1000006];
int main()
{
   //freopen("t5.in","r",stdin);
   //freopen("t5.out","w",stdout);
   //ios::sync_with_stdio(false);
   //cin.tie(0); cout.tie(0);
    int i,j,n,m;
    scanf("%d",&n);
    scanf("%s",s);
    b[0]=-1;
    for(i=1;i<n;i++)
    {
        int poi=abs(s[i]-s[i-1]);
        a[poi]++;
        b[i]=poi;
    }
    if(n==2)cout<<b[1];
    else if(a[0]==0&&a[1]==0)cout<<0;
    else if(a[0]==0&&a[2]==0)cout<<0;
    else if(a[2]==0&&a[1]==0)cout<<0;
    else if(a[1]==0)
    {
        int sum=0;
        for(i=1;i<n;i++)
        {
            if(b[i]!=b[i-1])sum++;
        }
        if(sum%2)cout<<0;
        else cout<<2;
    }
    else
    {
      int sum=0;
        for(i=1;i<n-1;i++)
        {
            if(i==1)sum++;
            else if((b[i]-b[i-1])%2!=(b[i-1]-b[i-2)%2)sum++;
        }
        if(sum%2)cout<<1;
        else cout<<0;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:51: error: expected ']' before ')' token
   42 |             else if((b[i]-b[i-1])%2!=(b[i-1]-b[i-2)%2)sum++;
      |                                                   ^
      |                                                   ]
Language: C++

#include <iostream>

using namespace std;
int recur(int N, int *p)
{
    if(N==1)
    {cout<<p[N];
     return 0;}
  for(int i=1;i<=N;i++)
  { if((p[i+1]-p[i])>0)
      p[i]=p[i+1]-p[i];
      else
        p[i]=p[i]-p[i+1];
      }
      N--;
      return(recur(N,p));
  }
int main()
{
    int N,i;
  int *p=(int*)malloc(N*(sizeof(int)));
    cin>>N;
  for(i=1;i<=N;i++)
    cin>>a[i];

    recur(N,a);

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:10: error: 'a' was not declared in this scope
   24 |     cin>>a[i];
      |          ^
a.cc:26:13: error: 'a' was not declared in this scope
   26 |     recur(N,a);
      |             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int a[4];
int b[1000002];
char s[1000006];
int main()
{
   //freopen("t5.in","r",stdin);
   //freopen("t5.out","w",stdout);
   //ios::sync_with_stdio(false);
   //cin.tie(0); cout.tie(0);
    int i,j,n,m;
    scanf("%d",&n);
    scanf("%s",s);
    b[0]=-1;
    for(i=1;i<n;i++)
    {
        int poi=abs(s[i]-s[i-1]);
        a[poi]++;
        b[i]=poi;
    }
    if(n==2)cout<<b[1];
    else if(a[0]==0&&a[1]==0)cout<<0;
    else if(a[0]==0&&a[2]==0)cout<<0;
    else if(a[2]==0&&a[1]==0)cout<<0;
    else if(a[1]==0)
    {
        int sum=0;
        for(i=1;i<n;i++)
        {
            if(b[i]!=b[i-1])sum++;
        }
        if(sum%2)cout<<0;
        else cout<<2;
    }
    else
    {
      int sum=0;
        for(i=1;i<n-1;i++)
        {
            if(i==1)sum++;
            else if((b[i]-b[i-1])%2!=(b[i-1]-b[i-2)%2)sum++;
        }
        if(sum%2)cout<<0;
        else cout<<1;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:51: error: expected ']' before ')' token
   42 |             else if((b[i]-b[i-1])%2!=(b[i-1]-b[i-2)%2)sum++;
      |                                                   ^
      |                                                   ]