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

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

int main(){
  int N;
  cin >> N;
  vector<int> A(N);
  for(int i = 0; i < N; i++){
    cin >> A[i];
  }
  int count = 0;
  for(int i = 0; i < N; i++){
    if(A[i] < 0){
      count++;
    }
  }
  int ans = 0;
  if(count % 2 == 0){
    for(int i = 0; i < N; i++){
      ans += abs(A[i]);
    }
  }
  if(count % 2 == 1){
    int m = 999999999;
    for(int i = 0; i < N; i++){
      m = min(m,abs(A[i]));
    }
    int v = 0;
    for(int i = 0; i < N; i++){
      if(abs(A[i]){
        v = i;
        break;
      }
    }
    for(int i = 0; i < N; i++){
      if(i != v){
        ans += abs(A[i]);
      }
    }
    ans -= m; 
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:19: error: expected ')' before '{' token
   30 |       if(abs(A[i]){
      |         ~         ^
      |                   )
a.cc:34:5: error: expected primary-expression before '}' token
   34 |     }
      |     ^
Language: C++

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

int main(){
  int N;
  cin >> N;
  vector<int> A(N);
  for(int i = 0; i < N; i++){
    cin >> A[i];
  }
  int count = 0;
  for(int i = 0; i < N; i++){
    if(A[i] < 0){
      count++;
    }
  }
  int ans = 0;
  if(count % 2 == 0){
    for(int i = 0; i < N; i++){
      ans += abs(A[i]);
    }
  }
  if(count % 2 == 1){
    int m = 99999999;
    for(int i = 0; i < N; i++){
      m = min(m,abs(A[i]));
    }
    int v = 0;
    for(int i = 0; i < N; i++){
      if(abs[A[i]]){
        v = i;
        break;
      }
    }
    for(int i = 0; i < N; i++){
      if(i != v){
        ans += abs[A[i]];
      }
    }
    ans -= m; 
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:13: error: invalid types '<unresolved overloaded function type>[__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type {aka int}]' for array subscript
   30 |       if(abs[A[i]]){
      |             ^
a.cc:37:19: error: invalid types '<unresolved overloaded function type>[__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type {aka int}]' for array subscript
   37 |         ans += abs[A[i]];
      |                   ^
Language: C++

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

int main(){
  int N;
  cin >> N;
  for(int i = 0; i < N; i++){
    cin >> A[i];
  }
  int count = 0;
  for(int i = 0; i < N; i++){
    if(A[i] < 0){
      count++;
    }
  }
  int ans = 0;
  if(count % 2 == 0){
    for(int i = 0; i < N; i++){
      ans += abs(A[i]);
    }
  }
  if(count % 2 == 1){
    int m = 99999999;
    for(int i = 0; i < N; i++){
      m = min(m,abs(A[i]));
    }
    int v = 0;
    for(int i = 0; i < N; i++){
      if(abs[A[i]]){
        v = i;
        break;
      }
    }
    for(int i = 0; i < N; i++){
      if(i != v){
        ans += abs[A[i]];
      }
    }
    ans -= m; 
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: 'A' was not declared in this scope
    8 |     cin >> A[i];
      |            ^
a.cc:12:8: error: 'A' was not declared in this scope
   12 |     if(A[i] < 0){
      |        ^
a.cc:19:18: error: 'A' was not declared in this scope
   19 |       ans += abs(A[i]);
      |                  ^
a.cc:25:21: error: 'A' was not declared in this scope
   25 |       m = min(m,abs(A[i]));
      |                     ^
a.cc:29:14: error: 'A' was not declared in this scope
   29 |       if(abs[A[i]]){
      |              ^
a.cc:36:20: error: 'A' was not declared in this scope
   36 |         ans += abs[A[i]];
      |                    ^
Language: C++

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

int main(){
	int n; cin >>n;
	vector<long long> a(n);
	cinf(n,a);
	int cnt=0;
	ll m=10000000000;
	ll sum=0;
	for(int i=0;i<n;i++){
		if(a[i]<0)cnt++;
		m=min(min,a[i]);
		sum+=abs(a[i]);
	}
	if(cnt %2 ==0)cout << sum << endl;
	else cout << sum-m*2 << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:22: error: no matching function for call to 'min(<unresolved overloaded function type>, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   15 |                 m=min(min,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: 'constexpr const _Tp& std::min(const _Tp&, const _Tp&) [with _Tp = long long int]'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:20: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'const long long int&'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |         ~~~~~~~~~~~^~~
/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:15:22: note:   couldn't deduce template parameter '_Tp'
   15 |                 m=min(min,a[i]);
      |                   ~~~^~~~~~~~~~
Language: C++

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

int main(){
	int n; cin >>n;
	vector<long long> a(n);
	cinf(n,a);
	int cnt=0;
	ll min=10000000000;
	ll sum=0;
	for(int i=0;i<n;i++){
		if(a[i]<0)cnt++;
		min=min(min,a[i]);
		sum+=abs(a[i]);
	}
	if(cnt %2 ==0)cout << sum << endl;
	else cout << sum-min*2 << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:24: error: 'min' cannot be used as a function
   15 |                 min=min(min,a[i]);
      |                     ~~~^~~~~~~~~~
Language: C++

#include <iostream>
#include <vector>

using namespace std;

void chAbs(vector<int> &A) {
    for (int i = 0; i < A.size(); i++) A[i] = abs(A[i]);
    sort(A.begin(), A.end(), less<int>());
}

int sum(vector<int> A) {
    int am = 0;
    for (int &a: A) am += abs(a);
    return am;
}

int main() {
    int N, ans = 0;
    cin >> N;
    vector<int> A(N);
    for (int i = 0; i < N; i++) cin >> A[i];
    int mC = count_if(A.begin(), A.end(), [](int x) { return x < 0; });

    chAbs(A);
    ans = sum(A);
    if (mC % 2 != 0) {
        ans -= A[0] * 2;
    }

    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'void chAbs(std::vector<int>&)':
a.cc:8:5: error: 'sort' was not declared in this scope; did you mean 'short'?
    8 |     sort(A.begin(), A.end(), less<int>());
      |     ^~~~
      |     short
a.cc: In function 'int main()':
a.cc:22:14: error: 'count_if' was not declared in this scope
   22 |     int mC = count_if(A.begin(), A.end(), [](int x) { return x < 0; });
      |              ^~~~~~~~
Language: C++

#include<iostream>
#include<algorithm>
#include<vector>
#define int long long
using namespace std;
int N;
vector<int> A;
vector<int> B;
signed main(){
  cin >> N;
  A.resize(N);
  B.resize(N);
  for(int i=0;i<N;i++){
    cin >> A[i];
    if(A[i] < 0){
      B[i] = -A[i];
    }
    else{
      B[i] = A[i];
    }
  }
  int check = 0;
  for(int i=0;i<N;i++){
    if(A[i] < 0){
      check++;
    }
  }
  if(check % 2 == 0){
    cout << accumulate(B.begin(),B.end(),0LL);
  }
  else{
    int minElement = 10000000000LL;
    for(int i = 0;i < N;i++){
      minElement = min(B[i],minElement);
    }
    cout << accumulate(B.begin(),B.end(),0LL) - 2 * minElement << endl;
  }

}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:13: error: 'accumulate' was not declared in this scope
   29 |     cout << accumulate(B.begin(),B.end(),0LL);
      |             ^~~~~~~~~~
a.cc:36:13: error: 'accumulate' was not declared in this scope
   36 |     cout << accumulate(B.begin(),B.end(),0LL) - 2 * minElement << endl;
      |             ^~~~~~~~~~
Language: C++

#include<iostream>
#include<algorithm>
#define int long long
using namespace std;
int N;
vector<int> A;
vector<int> B;
signed main(){
  cin >> N;
  A.resize(N);
  B.resize(N);
  for(int i=0;i<N;i++){
    cin >> A[i];
    if(A[i] < 0){
      B[i] = -A[i];
    }
    else{
      B[i] = A[i];
    }
  }
  int check = 0;
  for(int i=0;i<N;i++){
    if(A[i] < 0){
      check++;
    }
  }
  if(check % 2 == 0){
    cout << accumulate(B.begin(),B.end(),0LL);
  }
  else{
    int minElement = 10000000000LL;
    for(int i = 0;i < N;i++){
      minElement = min(B[i],minElement);
    }
    cout << accumulate(B.begin(),B.end(),0LL) - 2 * minElement << endl;
  }

}


Compiler output:
a.cc:6:1: error: 'vector' does not name a type
    6 | vector<int> A;
      | ^~~~~~
a.cc:7:1: error: 'vector' does not name a type
    7 | vector<int> B;
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:10:3: error: 'A' was not declared in this scope
   10 |   A.resize(N);
      |   ^
a.cc:11:3: error: 'B' was not declared in this scope
   11 |   B.resize(N);
      |   ^
a.cc:28:13: error: 'accumulate' was not declared in this scope
   28 |     cout << accumulate(B.begin(),B.end(),0LL);
      |             ^~~~~~~~~~
a.cc:35:13: error: 'accumulate' was not declared in this scope
   35 |     cout << accumulate(B.begin(),B.end(),0LL) - 2 * minElement << endl;
      |             ^~~~~~~~~~
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <climits>
#include <cmath>
#include <map>
using namespace std;
int main(void){
    int n;
    cin >> n;
    int num = 0;
    long int dis = LONG_MAX;
    long int sum = 0;
    for(int i=0; i<n; i++){
        long int a;
        cin >> a;
        sum += labs(a);
        if(a < 0){
            num++;
        }
        if(labs(a[i]) < dis){
            dis = labs(a[i]);
        }
    }
    
    long int ans;
    if(num%2 == 0){
        ans = sum;
    }else{
        ans = sum - 2*dis;
    }
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:18: error: invalid types 'long int[int]' for array subscript
   21 |         if(labs(a[i]) < dis){
      |                  ^
a.cc:22:25: error: invalid types 'long int[int]' for array subscript
   22 |             dis = labs(a[i]);
      |                         ^
Language: C++

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

int main() {
    int N;
    cin>>N;
    vector<int> A(N);
    for(int i=0;i<N;i++){
        cin>>A[i];
    }
	vector<vector<int>> dp(N+1,vector<int>(2,0));
    dp[0][0]=0;
    dp[0][1]=INT_MIN;
    for(int i=1;i<=N;i+++){
      dp[i][0]=max(dp[i-1][0]+A[i-1],dp[i-1][1]-A[i-1]);
      dp[i][1]=max(dp[i-1][0]-A[i-1],dp[i-1][1]+A[i-1]);
    }
    cout<<max(dp[N][0],dp[N][1])<<endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:26: error: expected primary-expression before ')' token
   14 |     for(int i=1;i<=N;i+++){
      |                          ^
Language: C++

#include<iostream>
#include<algorithm>
#include<cmath>
using namespace std;
int main() {
  long long n;a[100000],cnt=0,ans=0,b=1000000000;
  cin >> n;
  for(int i=0; i<n; i++) {
    cin >> a[i];
    if(a[i]<0) {
      a[i]=abs(a[i]);
      cnt++;
    }
    b=min(b,a[i]);
    ans+=a[i];
  }
  if(cnt%2==1) {
    ans-=b*2;
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'a' was not declared in this scope
    6 |   long long n;a[100000],cnt=0,ans=0,b=1000000000;
      |               ^
a.cc:6:25: error: 'cnt' was not declared in this scope; did you mean 'int'?
    6 |   long long n;a[100000],cnt=0,ans=0,b=1000000000;
      |                         ^~~
      |                         int
a.cc:6:31: error: 'ans' was not declared in this scope; did you mean 'abs'?
    6 |   long long n;a[100000],cnt=0,ans=0,b=1000000000;
      |                               ^~~
      |                               abs
a.cc:6:37: error: 'b' was not declared in this scope
    6 |   long long n;a[100000],cnt=0,ans=0,b=1000000000;
      |                                     ^
Language: C++

#include <iostream>
#include <algorithm>
#include <cstring>
#include <sstream>
#include <map>
#include <queue>
#include <vector>
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> pos;
const ll MOD = 1000000007,N=100010;
ll n, a[N], ans, dp[N][2];
int main() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		if (i == 1) { dp[i][0] = a[i]; dp[i][1] = -INT_MIN; }
		else {
			dp[i][0] = max(dp[i - 1][0] + a[i], dp[i - 1][1] + a[i]);
			dp[i][1] = max(dp[i - 1][0] - 2 * a[i - 1] - a[i], dp[i - 1][1] + 2 * a[i - 1] - a[i]);
		}
	}
	cout << max(dp[n][0], dp[n][1]) << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:60: error: 'INT_MIN' was not declared in this scope
   17 |                 if (i == 1) { dp[i][0] = a[i]; dp[i][1] = -INT_MIN; }
      |                                                            ^~~~~~~
a.cc:7:1: note: 'INT_MIN' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    6 | #include <queue>
  +++ |+#include <climits>
    7 | #include <vector>
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for(int i=0; i<(n); ++i)
#define rep1(i,n) for(int i=1; i<=(n); ++i)
#define ALL(obj) (obj).begin(), (obj).end()
#define sz(v) (int)v.size()
#define pb push_back
 
using namespace std;
typedef long long ll;
ll N;
ll temp;
vector<ll> A;
int main(){
    cin >> N;
    rep(i,N) cin >> temp, A.pb(temp);
    sort(ALL(A));
    auto itr = lower_bound(ALL(A),0);
    int cnt = itr - A.begin();
    ll sum = 0;
    rep(i,N) sum += abs(A[i]);
    ll m = 1e18;
    rep(i,N) m = min(m,abs(A[i]));
    if(cnt % 2 == 1) sum -= 2*m;
    cout << sum << endl;
}　

Compiler output:
a.cc:25:2: error: extended character 　 is not valid in an identifier
   25 | }　
      |  ^
a.cc:25:2: error: '\U00003000' does not name a type
   25 | }　
      |  ^~
Language: C++

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

int main(){
 int ans=0; 
 int N,a,count;
   cin>>N;
 vector<int> A(N);

  for (int i = 0; i < N; i++) {
    cin >> A.at(i);
  }
  
  count=0;
  for (int i = 0; i < N; i++) {
   if(A.at(i)<0){
   A.at(i)=A.at(i)*-1;
   count++;
   }
  }

  if(count%2==0){
   for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  }
  
  if(count%2==1){
   if(A.at(i+1)<A.at(i)){
     a=A.at(i);
  A.at(i)=A.at(i+1);
  A.at(i+1)=a;
   }

    A.at(0)=A.at(0)*-1;
    
      for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  }
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:12: error: 'i' was not declared in this scope
   29 |    if(A.at(i+1)<A.at(i)){
      |            ^
Language: C++

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

int main(){
 int ans=0; 
 int N,a,count;
   cin>>N;
 vector<int> A(N);

  for (int i = 0; i < N; i++) {
    cin >> A.at(i);
  }
  
  count=0;
  for (int i = 0; i < N; i++) {
   if(A.at(i)<0){
   A.at(i)=A.at(i)*-1;
   count++;
   }
  }

  if(count%2=0){
   for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  }
  
  if(count%2=1){
     if(A.at(0)*-1>A.at(1)){
       a=A.at(i);
       A.at(i)=A.at(i+1);
       A.at(i+1)=a;
     }   
      for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  }
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:11: error: lvalue required as left operand of assignment
   22 |   if(count%2=0){
      |      ~~~~~^~
a.cc:28:11: error: lvalue required as left operand of assignment
   28 |   if(count%2=1){
      |      ~~~~~^~
a.cc:30:15: error: 'i' was not declared in this scope
   30 |        a=A.at(i);
      |               ^
Language: C++

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

int main(){
 int ans=0; 
 int N,a;
   cin>>N;
 vector<int> A(N);

  for (int i = 0; i < N; i++) {
    cin >> A.at(i);
  }
  
  while(true){
  for (int i = 0; i < N-1; i++) {
   if(A.at(i+1)<A.at(i)){
     a=A.at(i);
  A.at(i)=A.at(i+1);
  A.at(i+1)=a;
   }
    
  A.at(0)=A.at(0)*-1;
  A.at(1)=A.at(1)*-1;
  
    if(A.at(0)<0&&A.at(1)>0){
      if(A.at(0)*-1<A.at(1)){
      break;
      }
    }
  }
    
   for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  
cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:37:2: error: expected '}' at end of input
   37 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main(){
 int ans=0; 
 int N,a;
   cin>>N;
 vector<int> A(N);

  for (int i = 0; i < N; i++) {
    cin >> A.at(i);
  }
  
  for (int i = 0; i < N-1; i++) {
   if(A.at(i+1)<A.at(i)){
     a=A.at(i);
  A.at(i)=A.at(i+1);
  A.at(i+1)=a
   }
    
  A.at(0)=A.at(0)*-1;
  A.at(1)=A.at(1)*-1;
  
    if(A.at(0)<0&&A.at(1)>0){
      if(A.at(0)*-1<A.at(1)){
      break;
      }
    }
  }
   
   for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  
cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:14: error: expected ';' before '}' token
   18 |   A.at(i+1)=a
      |              ^
      |              ;
   19 |    }
      |    ~
Language: C++

#include <bits/stdc++.h>
#include <vector>

int main(){
 int ans=0; 
 int N,a;
   cin>>N;
 vector<int> A(N);

  for (int i = 0; i < N; i++) {
    cin >> A.at(i);
  }
  
  for (int i = 0; i < N-1; i++) {
   if(A.at(i+1)<A.at(i)){
     a=A.at(i);
  A.at(i)=A.at(i+1);
  A.at(i+1)=A.at(i);
   }
    
  A.at(0)=A.at(0)*-1;
  A.at(1)=A.at(1)*-1;
  
    if(A.at(0)<0&&A.at(1)>0){
      if(A.at(0)*-1<A.at(1)){
      break;
      }
    }
  }
   
   for (int i = 0; i < N; i++) {
   ans=ans+A.at(i);
   }
  
cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:4: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |    cin>>N;
      |    ^~~
      |    std::cin
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:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:2: error: 'vector' was not declared in this scope
    8 |  vector<int> A(N);
      |  ^~~~~~
a.cc:8:2: note: suggested alternatives:
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53:
/usr/include/c++/14/bits/stl_vector.h:428:11: note:   'std::vector'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
/usr/include/c++/14/vector:93:13: note:   'std::pmr::vector'
   93 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
a.cc:8:9: error: expected primary-expression before 'int'
    8 |  vector<int> A(N);
      |         ^~~
a.cc:11:12: error: 'A' was not declared in this scope
   11 |     cin >> A.at(i);
      |            ^
a.cc:15:7: error: 'A' was not declared in this scope
   15 |    if(A.at(i+1)<A.at(i)){
      |       ^
a.cc:21:3: error: 'A' was not declared in this scope
   21 |   A.at(0)=A.at(0)*-1;
      |   ^
a.cc:32:12: error: 'A' was not declared in this scope
   32 |    ans=ans+A.at(i);
      |            ^
a.cc:35:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   35 | cout << ans << endl;
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:35:16: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   35 | cout << ans << 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 namespace std;

int main() {
  int n,ooe,x,cnt;
  cin >> n;
  ooe = 0;
  x = 0;
  cnt = -1;
  vector<int> vec(n);
  for(int i = 0 ; i < n ; i++) {
    cin >> vec.at(i);
  }
  sort(vec.begin(), vec.end());
 
  for(int i = 0 ; i < n ; i++) {
    if(vec.at(i) <= 0){
      ooe++;
      cnt++;
      x += vec.at(i) *(-1);
    }
    else {
      x += vec.at(i);
    }
  }
  
  if(ooe%2 == 0){
    cout << x << endl;
  }
  else {
    cout << x - vec.at(count)*2 << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:23: error: no matching function for call to 'std::vector<int>::at(<unresolved overloaded function type>)'
   31 |     cout << x - vec.at(count)*2 << endl;
      |                 ~~~~~~^~~~~~~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:1180:7: note: candidate: 'std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::at(size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]'
 1180 |       at(size_type __n)
      |       ^~
/usr/include/c++/14/bits/stl_vector.h:1180:20: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::vector<int>::size_type' {aka 'long unsigned int'}
 1180 |       at(size_type __n)
      |          ~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:1199:7: note: candidate: 'std::vector<_Tp, _Alloc>::const_reference std::vector<_Tp, _Alloc>::at(size_type) const [with _Tp = int; _Alloc = std::allocator<int>; const_reference = const int&; size_type = long unsigned int]'
 1199 |       at(size_type __n) const
      |       ^~
/usr/include/c++/14/bits/stl_vector.h:1199:20: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::vector<int>::size_type' {aka 'long unsigned int'}
 1199 |       at(size_type __n) const
      |          ~~~~~~~~~~^~~
Language: C++

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

int main() {
  int n,ooe,x,cnt;
  cin >> n;
  ooe = 0;
  x = 0;
  cnt = -1;
  vector<int> vec(n);
  for(int i = 0 ; i < n ; i++) {
    cin >> vec.at(i);
    if(vec.at(i) <= 0){
      ooe++;
      cnt++;
      x += vec.at(i) *(-1);
    }
    else {
      x += vec.at(i);
    }
  }
  sort(vec.begin(), vec.end());
  
  if(ooe%2 == 0){
    cout << x << endl;
  }
  else {
    cout << x - vec.at(count)*2 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:23: error: no matching function for call to 'std::vector<int>::at(<unresolved overloaded function type>)'
   28 |     cout << x - vec.at(count)*2 << endl;
      |                 ~~~~~~^~~~~~~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:1180:7: note: candidate: 'std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::at(size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]'
 1180 |       at(size_type __n)
      |       ^~
/usr/include/c++/14/bits/stl_vector.h:1180:20: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::vector<int>::size_type' {aka 'long unsigned int'}
 1180 |       at(size_type __n)
      |          ~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:1199:7: note: candidate: 'std::vector<_Tp, _Alloc>::const_reference std::vector<_Tp, _Alloc>::at(size_type) const [with _Tp = int; _Alloc = std::allocator<int>; const_reference = const int&; size_type = long unsigned int]'
 1199 |       at(size_type __n) const
      |       ^~
/usr/include/c++/14/bits/stl_vector.h:1199:20: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::vector<int>::size_type' {aka 'long unsigned int'}
 1199 |       at(size_type __n) const
      |          ~~~~~~~~~~^~~
a.cc:29:2: error: expected '}' at end of input
   29 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <algorithm>
#include <iostream>
#include <cstdlib>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <string>
#include <typeinfo>
#include <random>
#include <vector>
 
using namespace std;
typedef long long ll;
typedef vector<bool> vb;
typedef vector<char> vc;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<string> vs;
typedef vector<vector<bool>> vvb;
typedef vector<vector<int>> vvi;
 
#define rep(i, n) for (int(i) = 0; (i) < (n); (i)++)
#define all(a) (a).begin(), (a).end()

int main()
{
	int n;
	cin>>n;
	vi a(n);
	int cnt=0;
	rep(i,n){
		cin>>a.at(i);
		if(a.at(i)<=0){
			cnt++;
		}
	}
	ll ans=0;
	if(cnt%2==0){
		rep(i,n){
			ans+=abs(a.at(i));
		}
		cout<<ans<<endl;
		return 0;
	}
	sort(all(a));
	vi ng,ps;
	ng.push_back(0);
	ps.push_back(0);
	rep(i,n){
		if(a.at(i)<0){
			ng.push_back(-1*a.at(i));
		}else{
			ps.push_back(a.at(i));
		}
	}
	rep(i,ng.size()){
		if(i!=ng.size()-1){
			ans+=ng.at(i);
		}
	}
	rep(i,ps.size()){
		if(i!=1){
			ans+=ps.at(i);
		}
	}
	if(ps.size()==1){
		ans-=ne.at(ne.size()-1);
	}else{
		if(ng.at(ng.size()-1)>ps.at(1)){
			ans+=ng.at(ng.size()-1);
			ans-=ps.at(1);
		}else{
			ans-=ng.at(ng.size()-1);
			ans+=ps.at(1);
		}
	}
	cout<<ans<<endl;
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:67:22: error: 'ne' was not declared in this scope; did you mean 'ng'?
   67 |                 ans-=ne.at(ne.size()-1);
      |                      ^~
      |                      ng
Language: C++

int main(){

    int n;
    std::cin>>n;

    long int num[10000]={0};
    for(int i=0;i<n;i++){
        std::cin>>num[i];
    }

    int counter=0;
    int min=1000000000;
    for(int i=0;i<n;i++){
        if(num[i]<0){
            
            counter++;
           
        }
    }

    for(int i=0;i<n;i++){
        if(min>abs(num[i])){
            min=abs(num[i]);
        }
    }

    long int ans=0;
    if(counter%2==0){
        for(int i=0;i<n;i++){
            ans+=abs(num[i]);
        }
    }
    else{
        for(int i=0;i<n;i++){
            ans+=abs(num[i]);
        }
        ans-=min*2;
    }

     std::cout << ans<< std::endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:10: error: 'cin' is not a member of 'std'
    4 |     std::cin>>n;
      |          ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | int main(){
a.cc:8:14: error: 'cin' is not a member of 'std'
    8 |         std::cin>>num[i];
      |              ^~~
a.cc:8:14: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:22:16: error: 'abs' was not declared in this scope
   22 |         if(min>abs(num[i])){
      |                ^~~
a.cc:30:18: error: 'abs' was not declared in this scope; did you mean 'ans'?
   30 |             ans+=abs(num[i]);
      |                  ^~~
      |                  ans
a.cc:35:18: error: 'abs' was not declared in this scope; did you mean 'ans'?
   35 |             ans+=abs(num[i]);
      |                  ^~~
      |                  ans
a.cc:40:11: error: 'cout' is not a member of 'std'
   40 |      std::cout << ans<< std::endl;
      |           ^~~~
a.cc:40:11: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:40:30: error: 'endl' is not a member of 'std'
   40 |      std::cout << ans<< std::endl;
      |                              ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | int main(){
Language: Java

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int max = sc.nextInt();
   int[] a = new int(max);
   int count = 0;
   for(int i=0;i<max;i++){
   int c = sc.nextInt();
     if(c<0){
     count++;
     c = -c;
     }
   a[i] = c;
   }
   long sum =0;
   if(count%2 == 1){
     int min = a[0];
     for(int i = 0;i<a.length;i++)
     {
       if(min > a[i]) min = a[i];
       sum += a[i];
     }
     sum = sum - 2*min;
   }else{
     for(int i =0;i<a.length;i++)
     {
       sum +=a[i]; 
     }
   }
    System.out.print(sum);
   
   
 }
}

Compiler output:
Main.java:6: error: '[' expected
   int[] a = new int(max);
                    ^
Main.java:6: error: ']' expected
   int[] a = new int(max);
                         ^
2 errors
Language: Java

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int max = sc.nextInt();
   int[] a = new int(max);
   int count = 0;
   for(int i=0;i<max;i++){
   int c = sc.nextInt();
     if(c<0){
     count++;
     c = -c;
     }
   a[i] = c;
   }
   int sum =0;
   if(count%2 == 1){
     int min = a[0];
     for(int i = 0;i<a.length;i++)
     {
       if(min > a[i]) min = a[i];
       sum += a[i];
     }
     sum = sum - 2*min;
   }else{
     for(int i =0;i<a.length;i++)
     {
       sum +=a[i]; 
     }
   }
    System.out.print(sum);
   
   
 }
}

Compiler output:
Main.java:6: error: '[' expected
   int[] a = new int(max);
                    ^
Main.java:6: error: ']' expected
   int[] a = new int(max);
                         ^
2 errors
Language: C++

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

int main() {
  int N; cin >> N;
  vector<long long> A(N);
  int sgn = 0;
  for(int i=0; i < N; ++i){
    cin >> A[i];
    if(A[i] < 0){
      sgn += 1;
    }
  }
  long long ans = 0;
  for(int i=0; i < N; ++i){
    ans += abs(A[i]);
  }
  if(sgn%2 != 0){
    long minus = 0;
    minus = min(A);
    ans - 2 * minus;
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:16: error: no matching function for call to 'min(std::vector<long long int>&)'
   22 |     minus = min(A);
      |             ~~~^~~
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:   candidate expects 2 arguments, 1 provided
/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, 1 provided
Language: C++

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

using ll = long long;
const ll amari = 1e9+7;
const char BC = 'A' - 'a';
#define ben(a) a.begin(),a.end()
#define pb(a,b) a.push_back(b)

int main(){
	int n;
	cin >> n;
	int minus = 0;
	ll sum = 0;
	ll mini = 1000000001;
	ll a;
	for(int i = 0; i < n; i++){
		cin >> a;
		sum += abs(a);
		mini = min(mini,abs(a));
		if(a < 0)count++;
	}
	if(count % 2)cout << sum - 2 * mini << endl;
	else cout << sum << endl;
	return 0; 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:31: error: no post-increment operator for type
   21 |                 if(a < 0)count++;
      |                               ^~
a.cc:23:18: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator%'
   23 |         if(count % 2)cout << sum - 2 * mini << endl;
      |            ~~~~~~^~~
Language: C++

#include <iostream>
#include <vector>
#define long long ll

using namespace std;

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

  int negative_count = 0;
  vector<int> a(n, 0);
  int sum = 0;
  int max_neg_a = -1 * INT_MAX;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    if (a[i] < 0) {
      negative_count += 1;
      sum += -1 * a[i];
      if (max_neg_a < a[i]) {
        max_neg_a = a[i];
      }
    } else {
      sum += a[i];
    }
  }


  if (negative_count % 2 == 0) {
    cout << sum << endl;
  } else {
    cout << sum - max_neg_a << endl;
  }

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:24: error: 'INT_MAX' was not declared in this scope
   14 |   int max_neg_a = -1 * INT_MAX;
      |                        ^~~~~~~
a.cc:3:1: note: 'INT_MAX' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    2 | #include <vector>
  +++ |+#include <climits>
    3 | #define long long ll
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:27:12: error: no matching function for call to 'min(int&, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   27 |       m=min(m,b[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:27:12: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   27 |       m=min(m,b[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:27:12: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   27 |       m=min(m,b[i]);
      |         ~~~^~~~~~~~
Language: Java

import java.util.*;
import java.math.*;

class Main {
  public static void main(String[] args) {
    Scanner stdIn = new Scanner(System.in);
    int n = stdIn.nextInt();
    double[] a = new double[n];
    int un = 0;
    for(int i = 0;i<n;i++) {
      a[i] = stdIn.nextDouble();
      if(a[i]<0)  {
        un+=1;
        a[i] = (-1)*a[i];
    }
    double min = a[0];
    double k = 0;
    if(un%2==0)  k =addArray(a);
    if(un%2==1) {
      for(int i = 0;i<a.length;i++) {
      if(min>a[i]) min = a[i];
    }
    k = addArray(a);
    k = k - 2*min;
    }
    System.out.println(k);
  }
  static double addArray(double[] a) {
    double count = 0;
    for(int i = 0;i<a.length;i++) {
      count += a[i];
    }
    return count;
  }
}

Compiler output:
Main.java:28: error: illegal start of expression
  static double addArray(double[] a) {
  ^
1 error
Language: C++

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

int main() {
  int n,ooe,x;
  cin >> n;
  ooe = 0;
  x = 0
  vector<int> vec(n);
  for(int i = 0 ; i < n ; i++) {
    cin >> vec.at(i);
    if(vec.at(i) < 0){
      ooe++;
    }
  }
  sort(vec.begin(), vec.end());
  
  int count = -1 ;
  
  if(ooe%2 == 0){
    for(int i = 0 ; i < n ; i++) {
      if(vec.at(i) < 0){
        x += vec.at(i)*(-1);
      }
      else {
        x += vec.at(i);
      }
    }
    cout << x << endl;
  }
  
  else {
    for(int i = 0 ; i < n ; i++) {
      if(vec.at(i) < 0){
        x += vec.at(i)*(-1);
        count++;
      }
      else {
        x += vec.at(i);
      }
    }
    cout << x - vec.at(count)*2 << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: expected ';' before 'vector'
    8 |   x = 0
      |        ^
      |        ;
    9 |   vector<int> vec(n);
      |   ~~~~~~
a.cc:11:12: error: 'vec' was not declared in this scope
   11 |     cin >> vec.at(i);
      |            ^~~
a.cc:16:8: error: 'vec' was not declared in this scope
   16 |   sort(vec.begin(), vec.end());
      |        ^~~
Language: C++

#include<bits/stdc++.h>
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
#include<map>
#include <limits>
#include <numeric>
#include <type_traits>
using namespace std;
int main(){
  int n;
  cin >> n;
  vector<long long int> a(n);
  for (int i=0; i<n; i++){
    cin >> a[i];
  }
  vector<long long int> b(n);
  for (int i=0; i<n; i++){
    if (a[i]<0) b[i] = (-1)*a[i];
    else b[i]=a[i];
  }
  int mc=0;
  long long int ac=0;
  for (int i=0; i<n; i++) if(a[i]<0) mc++;
  if (mc%2==0){
    for (int i; i<n; i++){
      ac += b[i];
    }
  }
  else{
    int m;
    m=b[0];
    for (int i=1; i<n; i++){
      m=min(m,b[i]);
    }
    for (int i; i<n; i++){
      ac += b[i];
    }
    ac=ac-2*m;
  }
  cout << ac << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:36:12: error: no matching function for call to 'min(int&, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   36 |       m=min(m,b[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:36:12: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   36 |       m=min(m,b[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:36:12: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   36 |       m=min(m,b[i]);
      |         ~~~^~~~~~~~
Language: C++

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

int main() {
  int n,ooe,x;
  cin >> n;
  ooe = 0;
  vector<int> vec(n);
  for(int i = 0 ; i < n ; i++) {
    cin >> vec.at(i);
    if(vec.at(i) < 0){
      ooe++;
    }
  }
  
  sort(vec.begin(), vec.end());
  int count = 0 ;
  
  if(ooe%2 = 0){
    for(int i = 0 ; i < n ; i++) {
      if(vec.at(i) < 0){
        x += vec.at(i)*(-1);
      }
      else {
        x += vec.at(i);
      }
    }
    cout << x << endl;
  }
  else {
    for(int i = 0 ; i < n ; i++) {
      if(vec.at(i) < 0){
        x += vec.at(i)*(-1);
        count++;
      }
      else {
        x += vec.at(i);
      }
    }
    cout << x - vec.at(count)*2 << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:9: error: lvalue required as left operand of assignment
   19 |   if(ooe%2 = 0){
      |      ~~~^~
Language: C

#include<stdio.h>

int main(void){
    int N;
    scanf("%d", &N);
    int A[N];
    for(int j=0; j<N; j++){
        scanf("%d", &A[j]);
    }
    long sum=0, maxsum=0;
    int minus=0;
    for(int i=0; i<N; i++){
        if(A[i] < 0){
            minus++;
        }
    }
    int nsmall = -1000000
    int smallnum;
    if(minus%2 == 0){
        for(int t=0; t<N; t++){
            if(A[t]>0){
                sum = sum + A[t];
            }else{
                sum = sum - A[t];
            }
        }
    }else{
        for(int s=0; s<N; s++){
            if(A[s]<0){
                if(A[s]>nsmall){
                    nsmall = A[s];
                    smallnum = s;
                }
            }
        }
        for(int u=0; u<N; u++){
            if(u != smallnum){
                 if(A[t]>0){
                sum = sum + A[t];
                }else{
                    sum = sum - A[t];
                }
            }else{
                sum = sum + nsmall;
            }
        }
    }
    printf("%ld\n", sum);

    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:18:5: error: expected ',' or ';' before 'int'
   18 |     int smallnum;
      |     ^~~
main.c:32:21: error: 'smallnum' undeclared (first use in this function)
   32 |                     smallnum = s;
      |                     ^~~~~~~~
main.c:32:21: note: each undeclared identifier is reported only once for each function it appears in
main.c:38:23: error: 't' undeclared (first use in this function)
   38 |                  if(A[t]>0){
      |                       ^
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:27:12: error: no matching function for call to 'min(int&, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   27 |       m=min(m,b[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:27:12: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   27 |       m=min(m,b[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:27:12: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   27 |       m=min(m,b[i]);
      |         ~~~^~~~~~~~