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

#include <bits/stdc++.h>
using namespace std;
struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
#define FOR(i, begin, end) for(int i=(begin);i<(end);i++)
#define REP(i, n) FOR(i,0,n)
#define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--)
#define IREP(i, n) IFOR(i,0,n)
#define Sort(v) sort(v.begin(), v.end())
#define Reverse(v) reverse(v.begin(), v.end())
#define all(v) v.begin(),v.end()
#define SZ(v) ((int)v.size())
#define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x))
#define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x))
#define Max(a, b) a = max(a, b)
#define Min(a, b) a = min(a, b)
#define bit(n) (1LL<<(n))
#define bit_exist(x, n) ((x >> n) & 1)
#define Ans(f, y, n) if(f) cout << y << endl; else cout << n << endl;
#define debug(x) cout << #x << "=" << x << endl;
#define vdebug(v) cout << #v << "=" << endl; REP(i, v.size()){ cout << v[i] << ","; } cout << endl;
#define mdebug(m) cout << #m << "=" << endl; REP(i, m.size()){ REP(j, m[i].size()){ cout << m[i][j] << ","; } cout << endl;}
#define pb push_back
#define f first
#define s second
#define int long long
#define INF 1000000000000000000

using vec = vector<int>;
using mat = vector<vec>;
using Pii = pair<int, int>;
using PiP = pair<int, Pii>;
using PPi = pair<Pii, int>;
using bools = vector<bool>;
using pairs = vector<Pii>;

template<typename T> void readv(vector<T> &a){ REP(i, a.size()) cin >> a[i]; }
void readv_m1(vector<int> &a){ REP(i, a.size()){cin >> a[i]; a[i]--;} }

//int dx[4] = {1,0,-1,0};
//int dy[4] = {0,1,0,-1};

int mod = 1000000007;
//int mod = 998244353;
#define Add(x, y) x = (x + (y)) % mod
#define Mult(x, y) x = (x * (y)) % mod

int extgcd(int a, int b, int &x, int &y){
    int d = a;
    if(b != 0){
        d = extgcd(b, a % b, y, x);
        y -= (a / b) * x;
    }else{
        x = 1;
        y = 0;
    }
    return d;
}

signed main(){

    int N; cin >> N;
    vec A(N); readv(A);

    vec G1(N), G2(N);
    int x, y;
    G1[0] = A[0];
    FOR(i, 1, N){
        int g = extgcd(G1[i - 1], A[i], x, y);
        G1[i] = g;
    }
    G2[N - 1] = A[N - 1];
    IFOR(i, 0, N - 1){
        int g = extgcd(G2[i + 1], A[i], x, y);
        G2[i] = g;
    }
    int ans = max(G1[N - 2], G2[1]);
    REP(i, N - 2) Max(ans, extgcd(G1[i], G2[i + 2]));
    cout << ans << endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:77:34: error: too few arguments to function 'long long int extgcd(long long int, long long int, long long int&, long long int&)'
   77 |     REP(i, N - 2) Max(ans, extgcd(G1[i], G2[i + 2]));
      |                            ~~~~~~^~~~~~~~~~~~~~~~~~
a.cc:14:30: note: in definition of macro 'Max'
   14 | #define Max(a, b) a = max(a, b)
      |                              ^
a.cc:47:5: note: declared here
   47 | int extgcd(int a, int b, int &x, int &y){
      |     ^~~~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int,int>;
#define chmax(x,y) x = max(x,y);
#define chmin(x,y) x = min(x,y);
const int di[] = {-1, 0, 1, 0};
const int dj[] = {0, -1, 0, 1};
const int INF = 1001001001;



int main() {
    int n;
    cin >> n;
    vector<ll> a(n);
    rep(i,n) cin >> a[i];
    int c = 0;
    rep(i,n) {
        if (a[i] < 0) c ^= 1;
    }
    ll ans = 0;
    rep(i,n) ans += abs(a[i]);
    if (c) {
        ll mn = 1e10;
        rep(i,n) {
            mn = min(mn, abs[a[i]]);
        }
        ans -= mn*2;
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:29: error: invalid types '<unresolved overloaded function type>[__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type {aka long long int}]' for array subscript
   28 |             mn = min(mn, abs[a[i]]);
      |                             ^
Language: C++

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

int main(){
  int n;
  cin >> n;
  vector<ll> a(n);
  rep(i,n) cin >> a[i];

  rep(i,n-1){
    if(a[i]<0 && a[i+1]<0) {
      a[i] *= -1;
      a[i+1] *= -1;
      continue;
    }
    else if(a[i]=>0 && a[i+1]=>0) continue;
    else if(a[i] <= 0){
      if(abs(a[i]) >= abs(a[i+1])){
        a[i] *= -1;
        a[i+1] *= -1;
      }
      continue;
    }
  }
  ll ans = 0;
  rep(i,n) ans += a[i];
  cout << ans << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:20:18: error: expected primary-expression before '>' token
   20 |     else if(a[i]=>0 && a[i+1]=>0) continue;
      |                  ^
a.cc:20:31: error: expected primary-expression before '>' token
   20 |     else if(a[i]=>0 && a[i+1]=>0) continue;
      |                               ^
Language: C++

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

#define rep(i,n)  for(int i=0;i<n;++i)
#define sc1(a)  scanf("%d",&a)

int main(){
    int n;
    sc1(n);
    long long  a,b=0ll,x=2e9ll;
    rep(i,n){
        scanf("%lld",&a);
        b+=abs(a);
        x=min(x,abs(a));
    }
    printf("%lld\n",x%2?b-x*2:b);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:26: error: unable to find numeric literal operator 'operator""ll'
   10 |     long long  a,b=0ll,x=2e9ll;
      |                          ^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;cin>>N;
  vector<int>A(N);
  long long shou=1e15;
  int c=0;
  long long count=0;
  for(int i=0;i<N;i++){
    cin>>A[i];
    if(A[i]<0)c++;
    count+=abs(A[i]);
    shou=min(shou,abs(A[i]));
  }
  if(c%2==0)cout<<count<<"\n";
  else cout<<count-shou<<"\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:13: error: no matching function for call to 'min(long long int&, int)'
   13 |     shou=min(shou,abs(A[i]));
      |          ~~~^~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:13:13: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   13 |     shou=min(shou,abs(A[i]));
      |          ~~~^~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:13:13: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   13 |     shou=min(shou,abs(A[i]));
      |          ~~~^~~~~~~~~~~~~~~~
Language: C++

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;

#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)
#define repp(i, a, n) for(ll i = a; i < (ll)(n); i++)
#define repd(i, n) for(ll i = n - 1; i >= 0; i--)
#define all(x) x.begin(), x.end()

ll k, l, m, n;
const ll M = 1e9 + 7;

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

cin >> n;

ll sum = 0, num = 0, min = M, a;
rep(i, n) {
    cin >> a;
    if(a < 0) {
        num++;
        a *= -1;
    }
    sum += a;
    if(a < min) min = a;
}

if(num % 2 == 0) {
    cout << sum << endl;
} else {
    cout << sun - min << endl;
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:39:13: error: 'sun' was not declared in this scope; did you mean 'sum'?
   39 |     cout << sun - min << endl;
      |             ^~~
      |             sum
Language: C++

#include <iostream>
#include <vector>
using namespace std;
int main{
  int N;
  cin >> N;
  vector<long long> A(N);
  int flag = 0;
  long long sum = 0;
  int cnt = 0;
  long long m = 1e18;
  for(int i = 0; i < N; i++){
    cin >> A[i];
    if(A[i] == 0) flag = 1;
    sum += abs(A[i]);
    if(A[i] < 0) cnt++;
    m = min(m, abs(A[i]));
  }
  if(flag == 1 || cnt % 2 == 0){
    cout << sum << endl;
    return 0;
  }
  cout << sum - m * 2 << endl;
}

Compiler output:
a.cc:4:5: error: cannot declare '::main' to be a global variable
    4 | int main{
      |     ^~~~
a.cc:5:3: error: expected primary-expression before 'int'
    5 |   int N;
      |   ^~~
a.cc:5:3: error: expected '}' before 'int'
a.cc:4:9: note: to match this '{'
    4 | int main{
      |         ^
a.cc:6:3: error: 'cin' does not name a type
    6 |   cin >> N;
      |   ^~~
a.cc:7:23: error: 'N' was not declared in this scope
    7 |   vector<long long> A(N);
      |                       ^
a.cc:12:3: error: expected unqualified-id before 'for'
   12 |   for(int i = 0; i < N; i++){
      |   ^~~
a.cc:12:18: error: 'i' does not name a type
   12 |   for(int i = 0; i < N; i++){
      |                  ^
a.cc:12:25: error: 'i' does not name a type
   12 |   for(int i = 0; i < N; i++){
      |                         ^
a.cc:19:3: error: expected unqualified-id before 'if'
   19 |   if(flag == 1 || cnt % 2 == 0){
      |   ^~
a.cc:23:3: error: 'cout' does not name a type
   23 |   cout << sum - m * 2 << endl;
      |   ^~~~
a.cc:24:1: error: expected declaration before '}' token
   24 | }
      | ^
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<string.h>
//if(strcmp(s[i],"AC")==0)
//if(s[l]=='#')
/*小文字判定
if((moji>= 'a') && (moji<='z')){
    printf("a\n");
    return 0;
  }
  */

long long int W_Length(char *str){
	long long int length = 0;
	while(*str++ != '\0')
		length++;
	return length;
}

void swap(long long int *a, long long int *b){
  int temp;
  temp=*a;
  *a=*b;
  *b=temp;
}
//swap(&a, &b)

double deg(double theta){//deg to theta
return theta*(2*3.14159265359)/360;
}

long long int cmp( const void *p, const void *q ) {
    return *(long long int*)p - *(long long int*)q;
}//ちいさい順
//qsort(a,n,sizeof(long long int),cmp);


int cmp_s(const void * left, const void * right)
{
	char *left_char = (char *)left;
  char *right_char = (char *)right;
  return strcmp(left_char, right_char);
}
//qsort(s,n,sizeof(s[0]),cmp_s);
//char s[n][11]

long long int GCD(long long int a, long long int b){
  long long int L=a,S=b;
  while(1){
    if(S>L){
      L=S+L;
      S=L-S;
      L=L-S;
    }
    if(L%S==0){
      return S;
    }
    L=L%S;
  }
  
}

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

int main (void)
{
	long long int p[5005],b,c,n,i,k,a[120000]={0},sum=0,max,j=1,get[5005]={0},temp1,k_temp;
scanf("%lld",&n);
  for(i=0;i<n;i++){
    scanf("%lld",&a[i]);
  }
  
  qsort(a,n,sizeof(long long int),cmp);
  
  
  
  
  for(i=0;a[i]<0;i++){
    a[i]=-a[i];
  }
  for(i=0;i<n;i++){
    sum+=a[i];
  }
  printf("%lld",sum)
return 0;;
}


Compiler output:
main.c: In function 'main':
main.c:76:35: error: passing argument 4 of 'qsort' from incompatible pointer type [-Wincompatible-pointer-types]
   76 |   qsort(a,n,sizeof(long long int),cmp);
      |                                   ^~~
      |                                   |
      |                                   long long int (*)(const void *, const void *)
In file included from main.c:2:
/usr/include/stdlib.h:971:34: note: expected '__compar_fn_t' {aka 'int (*)(const void *, const void *)'} but argument is of type 'long long int (*)(const void *, const void *)'
  971 |                    __compar_fn_t __compar) __nonnull ((1, 4));
      |                    ~~~~~~~~~~~~~~^~~~~~~~
main.c:87:21: error: expected ';' before 'return'
   87 |   printf("%lld",sum)
      |                     ^
      |                     ;
   88 | return 0;;
      | ~~~~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define rrep(i,n) for(int i=1;i<(n);++i)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define maxs(a, b) a = max(a, b)
#define mins(a, b) a = min(a, b)
using namespace std;
typedef long long ll;
typedef pair<int, int> P;
const ll linf = (1ll << 61);
const int inf = 1001001001;
const int mod = 1000000007;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	vector<int> a(n);
	rep(i, n) cin >> a[i];
	ll ans = 0;
	int cnt = 0;
	rep(i, n) { ans += abs(a[i]); if (a[i] < 0) cnt++; }
	if (cnt & 1) {
		ll mn = inf;
		rep(i, n) mins(mn, abs(a[i]));
		ans -= mn * 2;
	}
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:27: error: no matching function for call to 'min(ll&, int)'
    7 | #define mins(a, b) a = min(a, b)
      |                        ~~~^~~~~~
a.cc:27:27: note: in expansion of macro 'mins'
   27 |                 rep(i, n) mins(mn, abs(a[i]));
      |                           ^~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:7:27: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
    7 | #define mins(a, b) a = min(a, b)
      |                        ~~~^~~~~~
a.cc:27:27: note: in expansion of macro 'mins'
   27 |                 rep(i, n) mins(mn, abs(a[i]));
      |                           ^~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:7:27: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
    7 | #define mins(a, b) a = min(a, b)
      |                        ~~~^~~~~~
a.cc:27:27: note: in expansion of macro 'mins'
   27 |                 rep(i, n) mins(mn, abs(a[i]));
      |                           ^~~~
Language: C++

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

int main() {
  int N;
  cin >> N;
  vector<int64_t>data(N);
  int count=0;
  for(int i=0;i<N;i++){
    cin >> data.at(i);
    if(data.at(i)<0) count++;
    data.at(i)=abs(data.at(i));
  }
  int64_t ans=0;
  if(count%2==0){
    for(int i=0;i<N;i++){
      ans+=data.at(i);
    }
  }
  else{
    sort(data.begin(),data.end());
    ans-=data.at(0);
    for(int i=1;i<N;i++){
      ans+=data.at(i);
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc:1:1: error: stray '\' in program
    1 | \#include <bits/stdc++.h>
      | ^
a.cc:1:2: error: stray '#' in program
    1 | \#include <bits/stdc++.h>
      |  ^
a.cc:1:3: error: 'include' does not name a type
    1 | \#include <bits/stdc++.h>
      |   ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> N;
      |   ^~~
a.cc:7:3: error: 'vector' was not declared in this scope
    7 |   vector<int64_t>data(N);
      |   ^~~~~~
a.cc:7:10: error: 'int64_t' was not declared in this scope
    7 |   vector<int64_t>data(N);
      |          ^~~~~~~
a.cc:1:1: note: 'int64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
  +++ |+#include <cstdint>
    1 | \#include <bits/stdc++.h>
a.cc:7:18: error: 'data' was not declared in this scope
    7 |   vector<int64_t>data(N);
      |                  ^~~~
a.cc:12:16: error: 'abs' was not declared in this scope
   12 |     data.at(i)=abs(data.at(i));
      |                ^~~
a.cc:14:10: error: expected ';' before 'ans'
   14 |   int64_t ans=0;
      |          ^~~~
      |          ;
a.cc:17:7: error: 'ans' was not declared in this scope
   17 |       ans+=data.at(i);
      |       ^~~
a.cc:21:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   21 |     sort(data.begin(),data.end());
      |     ^~~~
      |     short
a.cc:22:5: error: 'ans' was not declared in this scope
   22 |     ans-=data.at(0);
      |     ^~~
a.cc:27:3: error: 'cout' was not declared in this scope; did you mean 'count'?
   27 |   cout << ans << endl;
      |   ^~~~
      |   count
a.cc:27:11: error: 'ans' was not declared in this scope
   27 |   cout << ans << endl;
      |           ^~~
a.cc:27:18: error: 'endl' was not declared in this scope
   27 |   cout << ans << endl;
      |                  ^~~~
Language: Java

import java.io.IOException;
import java.io.InputStream;
import java.util.InputMismatchException;

public class ABC125_d {

	public static void main(String[] args) {
		Task task = new Task();
		task.solve();
	}

	public static class Task {
		static final long MOD = (long) 1e9 + 7;

		public void solve() {
			Scan sc = new Scan();
			int n = (int) sc.scanLong();
			int minus = 0;
			int min = Integer.MAX_VALUE;
			long sum = 0;
			for (int i = 0; i < n; ++i) {
				int val = (int) sc.scanLong();
				if (val < 0)
					++minus;
				sum += Math.abs(val);
				min = Math.min(min, Math.abs(val));
			}
			if (minus % 2 == 0)
				System.out.println(sum);
			else
				System.out.println(sum - (min<<1));
		}
	}

	public static class Scan {
		private byte[] buf = new byte[1024];
		private int index;
		private InputStream in;
		private int total;

		public Scan() {
			in = System.in;
		}

		public int scan() {
			if (total < 0)
				throw new InputMismatchException();
			if (index >= total) {
				index = 0;
				try {
					total = in.read(buf);
				} catch (IOException e) {
					throw new RuntimeException(e);
				}
				if (total <= 0)
					return -1;
			}
			return buf[index++];
		}

		public long scanLong() {
			long integer = 0;
			int n = scan();
			while (isWhiteSpace(n))
				n = scan();
			int neg = 1;
			if (n == '-') {
				neg = -1;
				n = scan();
			}
			while (!isWhiteSpace(n)) {
				if (n >= '0' && n <= '9') {
					integer *= 10;
					integer += n - '0';
					n = scan();
				} else
					throw new InputMismatchException();
			}
			return neg * integer;
		}

		public double scanDouble() throws IOException {
			double doub = 0;
			int n = scan();
			while (isWhiteSpace(n))
				n = scan();
			int neg = 1;
			if (n == '-') {
				neg = -1;
				n = scan();
			}
			while (!isWhiteSpace(n) && n != '.') {
				if (n >= '0' && n <= '9') {
					doub *= 10;
					doub += n - '0';
					n = scan();
				} else
					throw new InputMismatchException();
			}
			if (n == '.') {
				n = scan();
				double temp = 1;
				while (!isWhiteSpace(n)) {
					if (n >= '0' && n <= '9') {
						temp /= 10;
						doub += (n - '0') * temp;
						n = scan();
					} else
						throw new InputMismatchException();
				}
			}
			return doub * neg;
		}

		public String scanString() {
			StringBuilder sb = new StringBuilder();
			int n = scan();
			while (isWhiteSpace(n))
				n = scan();
			while (!isWhiteSpace(n)) {
				sb.append((char) n);
				n = scan();
			}
			return sb.toString();
		}

		public char scanChar() {
			int n = scan();
			while (isWhiteSpace(n))
				n = scan();
			return (char) n;
		}

		private boolean isWhiteSpace(int n) {
			if (n == ' ' || n == '\n' || n == '\r' || n == '\t' || n == -1)
				return true;
			return false;
		}
	}
}


Compiler output:
Main.java:5: error: class ABC125_d is public, should be declared in a file named ABC125_d.java
public class ABC125_d {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
using st=string;
using ch=char;
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<P> vP;
typedef vector<ch> vc;
typedef vector<vc> vvc;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
#define ROF(i,a,b) for(ll i=a;i>=b;i--)
#define per(i,a) ROF(i,a,0)
const ll MOD=1000000007;
const ll MOD2=998244353;
const ld PI=acos(-1);
const ll INF=1e18;
st abc="abcdefghijklmnopqrstuvwxyz";
st ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
struct edge{ll to,cost;};

int main() {
  ll n;
  vl a(n);
  ll cnt=0;
  rep(i,n){
    cin >> a[i];
    if(a[i]<0){
      cnt++;
    }
    a[i]=abs(a[i]);
    sum+=a[i];
  }
  sort(a[i].begin(),a[i].end());
  if(cnt%2==0){
    cout << sum << endl;
  }
  else{
    cout << sum-2*a[0] << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:5: error: 'sum' was not declared in this scope
   35 |     sum+=a[i];
      |     ^~~
a.cc:37:10: error: 'i' was not declared in this scope
   37 |   sort(a[i].begin(),a[i].end());
      |          ^
a.cc:39:13: error: 'sum' was not declared in this scope
   39 |     cout << sum << endl;
      |             ^~~
a.cc:42:13: error: 'sum' was not declared in this scope
   42 |     cout << sum-2*a[0] << endl;
      |             ^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
    int N;
    cin >> N;
    vector<int>A(N);
    int res = 0;
    int ok = 0;
    int MIN = 1e9;
    for(int i = 0; i < N; i++) {
        cin >> A[i];
        if(A[i] < 0) {
            ok++;
            if(A[i] < MIN) {
                MIN = A[i];
            }
        }
        res+=abs(A[i])
    }
    if(ok%2 == 0) {
        cout << res << endl;
    }
    else {
        cout << res-abs(MIN)*2 << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:23: error: expected ';' before '}' token
   19 |         res+=abs(A[i])
      |                       ^
      |                       ;
   20 |     }
      |     ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin >> n;
    long long int a[n];
    for(int i=0;i<n;i++)cin >> a[i];
    int flag=0;
    long long int MIN=0;
    long long int ans=0;
    for(int i=0;i<n;i++){
        if(a[i]<0){
            a[i]*=-1;
            flag++;
        }
        MIN=min(0,a[i]);
        ans+=a[i];
    }
    if(flag%2==1)ans-=(MIN*2);
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:16: error: no matching function for call to 'min(int, long long int&)'
   16 |         MIN=min(0,a[i]);
      |             ~~~^~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:16:16: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   16 |         MIN=min(0,a[i]);
      |             ~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:16:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   16 |         MIN=min(0,a[i]);
      |             ~~~^~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin >> n;
    long long int a[n];
    for(int i=0;i<n;i++)cin >> a[i];
    int flag=0;
    int MIN=0;
    long long int ans=0;
    for(int i=0;i<n;i++){
        if(a[i]<0){
            a[i]*=-1;
            flag++;
        }
        MIN=min(0,a[i]);
        ans+=a[i];
    }
    if(flag%2==1)ans-=(MIN*2);
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:16: error: no matching function for call to 'min(int, long long int&)'
   16 |         MIN=min(0,a[i]);
      |             ~~~^~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:16:16: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   16 |         MIN=min(0,a[i]);
      |             ~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:16:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   16 |         MIN=min(0,a[i]);
      |             ~~~^~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef vector<int> VI;

template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }
#define _overload3(_1,_2,_3,name,...) name
#define _rep(i,n) repi(i,0,n)
#define repi(i,a,b) for(int i=int(a);i<int(b);++i)
#define rep(...) _overload3(__VA_ARGS__,repi,_rep,)(__VA_ARGS__)
#define all(x) (x).begin(),(x).end()

int main() {
    int n;
    cin >> n;
    vector<ll> a(n);
    bool flag = false;
    rep (i, n) {
        cin >> a[i];
        if (a[i] == 0) {
            flag = true;
        }
    }

    if (flag) {
        ll ans = 0;
        rep (i, n) {
            ans += abs(a[i]);
        }
        cout << ans << endl;
        exit(0);
    }
    sort(all(a));
    int idx = 0;
    ll ans = 0;
    while (idx + 1 < n) {
        ll p = a[idx];
        ll q = a[idx + 1];
        if (p < 0 && q < 0) {
            ans += -(p + q);
        } else if (p < 0) {
            ans += abs(p + q);
        } else {
                ans += p + q;
            }
        }
        idx += 2;

    }
    if (n % 2 == 1) {
        ans += a[n - 1];
    }
    cout << ans << endl;
}


Compiler output:
a.cc:52:5: error: expected unqualified-id before 'if'
   52 |     if (n % 2 == 1) {
      |     ^~
a.cc:55:5: error: 'cout' does not name a type
   55 |     cout << ans << endl;
      |     ^~~~
a.cc:56:1: error: expected declaration before '}' token
   56 | }
      | ^
Language: C++

#include <cstring>
#include <bits/stdc++.h>
using namespace std;
int main(){
long long counter1,counter2;
counter1=0;
counter2=0;
long long counter3=0;
long long N;
cin>>N;
long long a[N];
vector<long long>b(N)={};
for (int i=0;i<N;i++){
cin>>a[i];
b.at(i)=abs(a[i]);
counter1+=abs(a[i]);
if(a[i]<0)
counter2++;}
if (counter2%2==0)
cout<<counter1<<endl;
else{
sort(b.begin(),b.end());
for (int i=1;i<N;i++){
counter3+=b[i];}
cout<<counter3-b.at(0)<<endl;}}




Compiler output:
a.cc: In function 'int main()':
a.cc:12:22: error: expected ',' or ';' before '=' token
   12 | vector<long long>b(N)={};
      |                      ^
Language: C++

#include <iostream>
#include <vector>
using namespace std;
int main(){
  int n;cin>>n;
  vector<long long> A(n);
  int mins = 0;
  long long sm = 0;
  for(int i = 0; n > i; i++){
    cin>>A[i];
    sm += abs(A[i]);
    if(A[i] < 0)mins++;
    A[i] = abs(A[i]);
  }
  sort(A.begin(),A.end());
  if(mins%2 == n%2){
    sm -= A[0];
  }
  cout << sm << endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:15:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   15 |   sort(A.begin(),A.end());
      |   ^~~~
      |   short
Language: C++

//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
#include <algorithm>
#define rep(i,n) for(int i=0;i<(n);++i)
#define all(a) (a).begin(),(a).end()
using namespace std;
using Graph = vector<vector<int>>;
typedef long long ll;
const int mod= 1e+9+7;

int main(){
    ll n; cin>>n;
    vector<ll>a(n);
    ll sum=0;
    rep(i,n){
        cin>>a[i];
        sum+=a[i];
    }
    //cout<<sum<<endl;
    sort(a.begin(),a.end());
    for(int i=0;;i++){
        if(a[i]<=0&&a[i+1]<=0){
            sum+=2*(abs(a[i])+abs(a[i+1]));
            i++;
            if(i==n-1)break;
        }
        else if(a[i]<=&&a[i+1]>0){
            sum=max(sum,sum+2*(abs(a[i])-abs(a[i+1])));
            break;
        }
        else if(a[i]>=0&&a[i+1]>=0)break;
    }
    cout<<sum<<endl;
}





Compiler output:
a.cc: In function 'int main()':
a.cc:27:21: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   27 |         else if(a[i]<=&&a[i+1]>0){
a.cc:27:26: error: expected ')' before '[' token
   27 |         else if(a[i]<=&&a[i+1]>0){
      |                ~         ^
      |                          )
a.cc:27:25: error: label 'a' used but not defined
   27 |         else if(a[i]<=&&a[i+1]>0){
      |                         ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using long long=ll;
int main(){
  int N; cin >> N;
  ll MIN=10e+1;
  int count=1;
  ll sum=0;
  for(int i=0;i<N;i++){
    int a; cin >> a;
    sum+=abs(a);
    if(a<0){
      count*=-1;
    }
    MIN=min(MIN,abs(a));
  }
  if(count==-1){
    sum-=2*MIN;
  }
  cout << sum << endl;
  return 0;
}

Compiler output:
a.cc:3:7: error: expected nested-name-specifier before 'long'
    3 | using long long=ll;
      |       ^~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'll' was not declared in this scope
    6 |   ll MIN=10e+1;
      |   ^~
a.cc:8:5: error: expected ';' before 'sum'
    8 |   ll sum=0;
      |     ^~~~
      |     ;
a.cc:11:5: error: 'sum' was not declared in this scope
   11 |     sum+=abs(a);
      |     ^~~
a.cc:15:5: error: 'MIN' was not declared in this scope
   15 |     MIN=min(MIN,abs(a));
      |     ^~~
a.cc:18:5: error: 'sum' was not declared in this scope
   18 |     sum-=2*MIN;
      |     ^~~
a.cc:18:12: error: 'MIN' was not declared in this scope
   18 |     sum-=2*MIN;
      |            ^~~
a.cc:20:11: error: 'sum' was not declared in this scope
   20 |   cout << sum << endl;
      |           ^~~
Language: C++

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

#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
// 任意長整数型
using Bint = mp::cpp_int;
// 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする)
using Real = mp::number<mp::cpp_dec_float<1024>>;

int Min(vector<long> x){
  int a=x.size();
  for(int i=0;i<a-1;i++){
    x.at(i+1)=min(x.at(i),x.at(i+1));
  }
  return x.at(a-1);
}

long long f(vector<long> x){
  long long ans=0;
  for(int i=0;i<x.size();i++){
    ans+=x.at(i);
  }
  return ans;
}

int main() {
  int N,c;
  cin>>N;
  vector<long> a(N);
  Bint ans=0;
  for(int i=0;i<N;i++){
    cin>>a.at(i);
    if(a.at(i)<0){
      c++;
      a.at(i)=labs(a.at(i));
    }
  }
  //  cout<<a.at(0)<<Min(a);
  ans=f(a);
  if(c%2==1){
    ans-=2*Min(a);
  }
  //Bint X=10000000*100000;
  cout<<ans<<X;
  return 0;
}



Compiler output:
a.cc:5:10: fatal error: boost/multiprecision/cpp_dec_float.hpp: No such file or directory
    5 | #include <boost/multiprecision/cpp_dec_float.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main(){
  int n;
  cin >> n;
  long long ans=0;
  int y=0;
  long long minn=100000000000;
  rep(i,n){
    long long q;
    cin >> q;
    if(q<0)y=1-y;
    ans+=abs(q);
    minn=min(minn,abs(q));
  }
  if(y==1)cout << ans-2*min << endl;
  else cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:24: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator*'
   17 |   if(y==1)cout << ans-2*min << endl;
      |                       ~^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main(){
  int n;
  cin >> n;
  long long ans=0;
  int y=0;
  long long minn=100000000000;
  rep(i,n){
    int q;
    cin >> q;
    if(q<0)y=1-y;
    ans+=abs(q);
    minn=min(minn,abs(q));
  }
  if(y==1)cout << ans-2*min << endl;
  else cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:13: error: no matching function for call to 'min(long long int&, int)'
   15 |     minn=min(minn,abs(q));
      |          ~~~^~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:15:13: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   15 |     minn=min(minn,abs(q));
      |          ~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:15:13: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   15 |     minn=min(minn,abs(q));
      |          ~~~^~~~~~~~~~~~~
a.cc:17:24: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator*'
   17 |   if(y==1)cout << ans-2*min << endl;
      |                       ~^~~~
Language: C++

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

int main(){
    ll n;
    cin>>n;
    int count=0,sum=0,mn=INT_MAX;
    while(n--){
        ll x;
        cin>>x;
        sum+=abs(x);
        if(x<0)count++;
        x=abs(x);
        mn=min(mn,x);
    }
    //this is hacked not the actual solution
    if(count%2==1)sum-=2*mi;
    cout<<sum;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: no matching function for call to 'min(int&, long long int&)'
   15 |         mn=min(mn,x);
      |            ~~~^~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:15:15: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   15 |         mn=min(mn,x);
      |            ~~~^~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:15:15: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   15 |         mn=min(mn,x);
      |            ~~~^~~~~~
a.cc:18:26: error: 'mi' was not declared in this scope; did you mean 'mn'?
   18 |     if(count%2==1)sum-=2*mi;
      |                          ^~
      |                          mn
Language: C++

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

int main(){
    ll n;
    cin>>n;
    ll count=0,sum=0,mn=INT_MAX;
    while(n--){
        ll x;
        cin>>x;
        sum+=abs(x);
        if(x<0)count++;
        x=abs(x);
        mn=min(mn,x);
    }
    //this is hacked not the actual solution
    if(count%2==1)sum-=2*mi;
    cout<<sum;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:26: error: 'mi' was not declared in this scope; did you mean 'mn'?
   18 |     if(count%2==1)sum-=2*mi;
      |                          ^~
      |                          mn
Language: C++

 #include <iostream>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <vector>
#include <list>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <cctype>
#include <cassert>
#include <climits>
#include <string>
#include <bitset>
#include <cfloat>
#include <unordered_set>
#include <iomanip>
using namespace std;
typedef long double ld;
typedef long long int ll;
typedef unsigned long long int ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<char> vc;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<ll> vll;
typedef vector<pair<int,int> > vpii;
typedef vector<vector<int> > vvi;
typedef vector<vector<char> > vvc;
typedef vector<vector<string> > vvs;
typedef vector<vector<ll> > vvll;
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define rrep(i,n) for(int i = 1; i <= (n); ++i)
#define irep(it, stl) for(auto it = stl.begin(); it != stl.end(); it++)
#define drep(i,n) for(int i = (n) - 1; i >= 0; --i)
#define fin(ans) cout << (ans) << endl
#define mp(p,q) make_pair(p, q)
#define pb(n) push_back(n)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define Sort(a) sort(a.begin(), a.end())
#define Rort(a) sort(a.rbegin(), a.rend())
#define MATHPI acos(-1)
int dx8[8] = {1, 0, -1, 0, 1, -1, -1, 1};
int dy8[8] = {0, 1, 0, -1, 1, 1, -1, -1};
int dx4[4] = {1, 0, -1, 0};
int dy4[4] = {0, 1, 0, -1};
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;}
template<typename A, size_t N, typename T> void Fill(A (&array)[N], const T &val){ fill((T*)array, (T*)(array+N), val); }
struct io{io(){ios::sync_with_stdio(false);cin.tie(0);}};
const int INF = INT_MAX;
const ll LLINF = 1LL<<60;
const ll MOD = 1000000007;
const double EPS = 1e-9;
template < typename T > inline string toString( const T &a ) { ostringstream oss; oss << a; return oss.str(); };


int main()
{
  int N;
  cin >> N;
  vll a(N);
  rep(i,N){
      cin >> a[i];
  }

  int count=0;
  ll minNum=LLINF;
  rep(i,N){
    if(a[i] < 0) count++;
    minNum = min(minNum,abs(x));
  }
  //一旦中身を捨てて、全部＋－で考えてみると、ーが偶数なら全部＋できて、奇数なら絶対値で一番小さい奴を引けばいい
  ll sum=0;
  if(count%2==0){
      for(auto x:a){
          sum += abs(x);
      }
  }else{
      for(auto x:a){
          sum += abs(x);
      }
      sum-=minNum*2;//たとえば[3,4,5]だとすると12となっているが3は-にしなければいけないので[-3,4,5]となる、その場合6
  }

  fin(sum);


}



Compiler output:
a.cc: In function 'int main()':
a.cc:76:29: error: 'x' was not declared in this scope
   76 |     minNum = min(minNum,abs(x));
      |                             ^
Language: C++

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

int main() {
  int n;
  cin>>n;
  long long a[n];
  for(int i=0;i<n;i++){
    int k;
    cin>>k;
    a[i]=k;
  }
  sort(a.begin(),a.end());
  long long ans;
  if(n%2==0)ans=a[0];
  else ans=a[0]*(-1);
  for(int i=1;i<n;i++){
    ans+=a[i];
  }
  cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:10: error: request for member 'begin' in 'a', which is of non-class type 'long long int [n]'
   13 |   sort(a.begin(),a.end());
      |          ^~~~~
a.cc:13:20: error: request for member 'end' in 'a', which is of non-class type 'long long int [n]'
   13 |   sort(a.begin(),a.end());
      |                    ^~~
Language: C++

#include <iostream>
#include <set>
#include <cmath>
using namespace std;
const int N=100000+10;
int n,a[N];
int main(){
    scanf("%d",&n);
    long long ans=0, mn=1e9;
    int cnt=0;
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i]);
        mn = min(mn, (LL)abs(a[i]));
        if(a[i]<0) cnt++;
    }
    if(cnt%2==0){
        cout<<ans<<endl;
    }else{
        cout<<ans-2*mn<<endl;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:23: error: 'LL' was not declared in this scope
   13 |         mn = min(mn, (LL)abs(a[i]));
      |                       ^~
Language: C++

#include <iostream>
#include <set>
#include <cmath>
using namespace std;
const int N=100000+10;
int n,a[N];
int main(){
    scanf("%d",&n);
    long long ans=0, mn=1e9;
    int cnt=0;
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i]);
        mn = min(mn, abs(a[i]));
        if(a[i]<0) cnt++;
    }
    if(cnt%2==0){
        cout<<ans<<endl;
    }else{
        cout<<ans-2*mn<<endl;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:17: error: no matching function for call to 'min(long long int&, int)'
   13 |         mn = min(mn, abs(a[i]));
      |              ~~~^~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   13 |         mn = min(mn, abs(a[i]));
      |              ~~~^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
Language: C++

#include <iostream>
#include <set>
#include <cmath>
using namespace std;
const int N=100000+10;
int n,a[N];
int main(){
    scanf("%d",&n);
    long long ans=0, mn=1e9;
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i]);
        mn = min(mn, abs(a[i]));
    }
    if(st1.size()%2==0){
        cout<<ans<<endl;
    }else{
        cout<<ans-2*mn<<endl;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:17: error: no matching function for call to 'min(long long int&, int)'
   12 |         mn = min(mn, abs(a[i]));
      |              ~~~^~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:12:17: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   12 |         mn = min(mn, abs(a[i]));
      |              ~~~^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
a.cc:14:8: error: 'st1' was not declared in this scope; did you mean 'std'?
   14 |     if(st1.size()%2==0){
      |        ^~~
      |        std