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

#include <iostream>
#include <algorithm>
#include <cstring>
#include <memory.h>
#include <math.h>
#include <vector>
#include <map>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <stdio.h>
#include <queue>
#include <stack>
#include <cstdio>
#include <bitset>

using namespace std;

#define nfs ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define f first
#define s second
#define m_p make_pair
#define pb push_back
#define ii pair<int,int>
#define iii pair<int,pair<int,int> >
#define ll long long
#define ull unsigned long long
#define ld long double
#define ef else if
#define loc(x) (x).begin(),(x).end() 
#define locR(x) (x).rbegin(),(x).rend()
#define no puts("NO")
#define yes puts("YES")
#define ex puts("-1")
#define en puts("")
#define _ cout  
#define __ <<
#define outV(v) for(int i = 0 ; i < v.size() ; i++)cout << v[i] << ' ';
#define outA(x,l,r) for(int i = l ; i < r ; i++)cout << x[i] << ' ';

#ifndef ONLINE_JUDGE
#define scanf scanf_s
#endif

const ld EPS = 1e-18;
const double DEPS = 1e-9;
const ld PI = 3.141592653589793238;
const ll MOD = 998244353;
const int N = (int)(3e5) + 1;

void inp()
{
#ifndef ONLINE_JUDGE
	FILE* stream;
	freopen_s(&stream, "inp.txt", "r", stdin);
#endif
}
void out()
{
#ifndef ONLINE_JUDGE
	FILE* stream;
	freopen_s(&stream, "out.txt", "w", stdout);
#endif
}

ll gcd(ll fx, ll fy)
{
	if (!fy) return fx;
	return gcd(fy, fx % fy);
}

inline void fill(int* ar, int sz, int val)
{
	for (int i = 0; i < sz; i++)
	{
		ar[i] = val;
	}
}

int n, a[3030];
ll dp[3001][3001][2];
bool mark[3001][3001][2];

ll dfs(int l, int r, bool t)
{
	if (l > r || r < l)return 0;
	ll& dp = ::dp[l][r][t];
	if (mark[l][r][t])return dp;
	mark[l][r][t] = 1;
	ll x = (t ? -1 : 1) * a[l] + dfs(l + 1, r, !t);
	ll y = (t ? -1 : 1) * a[r] + dfs(l, r - 1, !t);

	return dp = (!t ? max(x, y) : min(x, y));
}

int main()
{
	inp();
	cin >> n;
	memset(dp, -1, sizeof(dp));
	for (int i = 0; i < n; i++)
	{
		scanf("%d", a + i);
	}

	printf("%lld", dfs(0, n - 1, 0));
}

Compiler output:
a.cc: In function 'void inp()':
a.cc:55:9: error: 'freopen_s' was not declared in this scope; did you mean 'freopen64'?
   55 |         freopen_s(&stream, "inp.txt", "r", stdin);
      |         ^~~~~~~~~
      |         freopen64
a.cc: In function 'void out()':
a.cc:62:9: error: 'freopen_s' was not declared in this scope; did you mean 'freopen64'?
   62 |         freopen_s(&stream, "out.txt", "w", stdout);
      |         ^~~~~~~~~
      |         freopen64
a.cc: In function 'int main()':
a.cc:42:15: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   42 | #define scanf scanf_s
      |               ^~~~~~~
a.cc:103:17: note: in expansion of macro 'scanf'
  103 |                 scanf("%d", a + i);
      |                 ^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e18;
const int INT_INF = 1e9;
const ll MOD = 1e9 + 7;
const int INT_MOD=1e9+7;
#define rep(i, n) for(int i = 0; i < n; i++)
#define REP(i, n) for(int i = 0; i <= n; i++)
#define rrep(i,n) for(int i=n;i>0;i--)
#define RREP(i,n) for(int i=n;i>=0;i--)
typedef pair<int, int> Pi;
typedef pair<double, double> P;

signed main(){
    int n;cin>>n;
    ll a[n+3];
    rep(i,n) cin>>a[i];
    //dp[i][j]:区間i～jが残っているときの値
    ll dp[3003][3003]={};
    RREP(i,n-1){
        rep(i,n){
            if((n-i-j-1)%2==0) dp[i][j]=max(dp[i+1][j]+a[i],dp[i][j-1]+a[j]);
            else dp[i][j]=min(dp[i+1][j]-a[i],dp[i][j-1]-a[j]);
        }
    }
    cout<<dp[0][n-1]<<endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:21: error: 'j' was not declared in this scope
   23 |             if((n-i-j-1)%2==0) dp[i][j]=max(dp[i+1][j]+a[i],dp[i][j-1]+a[j]);
      |                     ^
Language: C++

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

long long f(vector<long long> &v, int i, int j, vector<vector<long long> > dp) {
	if(i == j)
      	return v[i];
  
 	if(dp[i][j] != -1)
      	return dp[i][j];
  
  	dp[i][j] = max(v[i] - f(v, i+1, j, dp),
                   v[j] - f(v, i, j-1, dp));
                   
    return dp[i][j];
}
int main() {
  	int N;
 	cin>>N;
  	vector<long long> v(N,0);
  	
  	for(int i = 0 ; i < N ; i++) {
    	cin>>v[i];
    }
  	vector<vector<long long> > dp(N, vector<long long> (N, -1));
  	cout << f(v, 0, N-1) << endl;
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:18: error: too few arguments to function 'long long int f(std::vector<long long int>&, int, int, std::vector<std::vector<long long int> >)'
   25 |         cout << f(v, 0, N-1) << endl;
      |                 ~^~~~~~~~~~~
a.cc:4:11: note: declared here
    4 | long long f(vector<long long> &v, int i, int j, vector<vector<long long> > dp) {
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
 
/* attention
    long longのシフト演算には気をつけよう
    タイポした時のデバッグが死ぬほどきつくなるので変数名は最低3字くらい使った方がいいかも
    sizeは(int)とキャストしよう
    ごちゃごちゃ場合分けを考える前に全探索は考えましたか？
    詰まった時に、別の分野の問題として考え直す（これdpでは？、グラフとしてみればいいのでは？）
    多くの問題はパターンマッチだが、パターンに落とし込むまでが難しく、そのための訓練としてわからない問題をあれこれ色々な角度から考察してみるのではないか
*/

const ll mod = 1e9+7;

void chmod(ll &M){
    if(M >= mod) M %= mod;
    else if(M < 0){
        M += (abs(M)/mod + 1)*mod;
        M %= mod;
    }
}

ll modpow(ll x, ll n){
    if(n == 0) return 1;

    ll res = modpow(x, n/2);
    if(n%2 == 0) return res*res%mod;
    else return res*res%mod*x%mod;
}

ll power(ll x, ll n){
    if(n == 0) return 1;

    ll res = power(x, n/2);
    if(n%2 == 0) return res*res;
    else return res*res*x;
}

int getl(int i, int N) { return i==0? N-1:i-1; };
int getr(int i, int N) { return i==N-1? 0:i+1; };

/* <--------------------------------------------> */

typedef tuple<ll, ll, ll> T;

int n;
vector<vector<ll>> memo(3030, vector<ll>(3030, 0));
vector<ll> a(3030, 0);
vector<vector<bool>>  flg(3030, vector<bool>(3030, false));

ll rec(int l, int r){
    if(flg[l][r]) return memo[l][r];
    flg[l][r] = true;

    if(l==r) return memo[l][r] = a[l];
    return dp[l][r] = min(a[l]-rec(l+1, r), a[r]-rec(l, r-1));
}


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

    // 条件はどちらも「（自分の点数）ー（相手の点数）」最大化しようとする
    // 前から取るのがいいのか、後ろから取るのがいいのかは、残った数を使ってゲームの結果が分かれば判断できる
    // dp[i][j] := 区間[i,j]が残ってる時の、「次の手番の人の得点ーそうじゃない人の特点」

    cin >> n;
    for(int i=1; i<=n; ++i) cin >> a[i];

    cout << rec(1, n) << endl;

    
    return 0;
}

Compiler output:
a.cc: In function 'll rec(int, int)':
a.cc:60:12: error: 'dp' was not declared in this scope; did you mean 'dup'?
   60 |     return dp[l][r] = min(a[l]-rec(l+1, r), a[r]-rec(l, r-1));
      |            ^~
      |            dup
Language: C++

    #include<bits/stdc++.h>
    using namespace std;
     
     
    #define ll long long
    #define pb push_back
    #define mp make_pair
    #define loop(i, a, b) for(int i = (a); i < (b); i++)
    #define loopb(i, a, b) for(int i = (a); i > (b); --i)
     
    typedef pair <int,int> ii;
    typedef vector <int> vi;
    typedef vector <ii> vii;
    typedef vector <ll> vl;
     
    const int mod = 1e9+7;
    const ll inf = 2e18+5;
     
    int main()
    {
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);

        int n;
        cin>>n;
        vl a(n);
        loop(i,0,n) cin>>a[i];

        ll dp[3005][3005]; //dp[i][j] is the answer when interval of [i,j] is remaining. So our final answer will be [0,n-1]

        for(int i=n-1; i>=0; i--){
            for(int j=i; j<=n-1; j++){
                if(i==j)
                    dp[i][j] = a[i];
                else
                    dp[i][j] = max(a[i] - dp[i+1][j] , a[j] - dp[i][j-1])    
            }
        }

        cout<<dp[0][n-1];

        return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:74: error: expected ';' before '}' token
   37 |                     dp[i][j] = max(a[i] - dp[i+1][j] , a[j] - dp[i][j-1])
      |                                                                          ^
      |                                                                          ;
   38 |             }
      |             ~
Language: C++

#include <iostream>
using namespace std;
long long int PredictTheWinner(long long int A[], int n){
        
       long long int dp[n][n];
       long long int sum[n][n];
        sum[0][0] = A[0];
        dp[0][0] = A[0];
 
        for (int i = 1; i < n; ++i) {
            sum[0][i] = sum[0][i - 1] + A[i];
            sum[i][i] = A[i];
            dp[i][i] = A[i];
            for (int j = i - 1; j >= 0; --j) {
                sum[j][i] = sum[0][i] - (j == 0 ? 0 : sum[0][j - 1]);
                dp[j][i] = max(sum[j][i] - dp[j + 1][i],  sum[j][i] - dp[j][i - 1]);
            }
        }
        return dp[0][n-1]-(sum[0][n - 1]-dp[0][n - 1]);
    }
int main() {
	// your code goes here
  fastio std::ios::sync_with_stdio(false);cin.tie(NULL);
	int n;
	cin>>n;
	long long int a[n];
	for(int i=0;i<n;i++) cin>>a[i];
	cout<<PredictTheWinner(a,n);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:3: error: 'fastio' was not declared in this scope
   23 |   fastio std::ios::sync_with_stdio(false);cin.tie(NULL);
      |   ^~~~~~
Language: C++


// -_-
#include <bits/stdc++.h>
#define int long long
#define read(a) int a; cin >> a;
#define readarr(a, n) int a[(n) + 1] = {}; fori(i, 1, (n)) {cin >> a[i];}
#define readmat(a, n, m) int a[n + 1][m + 1] = {}; fori(i, 1, n) {fori(j, 1, m) cin >> a[i][j];}
#define pb push_back
#define fi first
#define se second
#define rz resize
#define fori(i, a, b) for(int i = a; i <= b; i++)
#define ford(i, a, b) for(int i = a; i >= b; i--)
#define mod 1000000007
#define  sort1(v) sort(v.begin(), v.end()) 
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pair <int, int>> vpi;
 
 
signed main() 
{
 
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
 
	read(n);
	readarr(a, n);
	int dp[n+1][n+1][3];
 
	int sum[n+1];
	sum[0] = 0;
	fori(i, 1, n) sum[i] = sum[i-1]+a[i];
 
	fori(i, 1, n-1)
	{
		fori(j, 1, n-i)
		{
			int k = j+i;
			if(k-j == 1) {dp[j][k][1] = max(a[j], a[k]); dp[j][k][2] = min(a[j], a[k]);}
			else
			{
				dp[j][k][1] = max(a[j] + dp[j+1][k][2], a[k] + dp[j][k-1][2]);
				dp[j][k][2] = (sum[k] - sum[j-1]) - dp[j][k][1];
			}
		}
	if(n==1) cout << a[1];
else
	cout << dp[1][n][1]-dp[1][n][2];
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:57:2: error: expected '}' at end of input
   57 | }
      |  ^
a.cc:27:1: note: to match this '{'
   27 | {
      | ^
Language: C++


// -_-
#include <bits/stdc++.h>
#define int long long
#define read(a) int a; cin >> a;
#define readarr(a, n) int a[(n) + 1] = {}; fori(i, 1, (n)) {cin >> a[i];}
#define readmat(a, n, m) int a[n + 1][m + 1] = {}; fori(i, 1, n) {fori(j, 1, m) cin >> a[i][j];}
#define pb push_back
#define fi first
#define se second
#define rz resize
#define fori(i, a, b) for(int i = a; i <= b; i++)
#define ford(i, a, b) for(int i = a; i >= b; i--)
#define mod 1000000007
#define  sort1(v) sort(v.begin(), v.end()) 
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pair <int, int>> vpi;
 
 
signed main() 
{
 
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
 
	read(n);
	readarr(a, n);
	int dp[n+1][n+1][3];
 
	int sum[n+1];
	sum[0] = 0;
	fori(i, 1, n) sum[i] = sum[i-1]+a[i];
 
	fori(i, 1, n-1)
	{
		fori(j, 1, n-i)
		{
			int k = j+i;
			if(k-j == 1) {dp[j][k][1] = max(a[j], a[k]); dp[j][k][2] = min(a[j], a[k]);}
			else
			{
				dp[j][k][1] = max(a[j] + dp[j+1][k][2], a[k] + dp[j][k-1][2]);
				dp[j][k][2] = (sum[k] - sum[j-1]) - dp[j][k][1];
			}
		}
	
	cout << dp[1][n][1]-dp[1][n][2];
	return 0;
}
// -_-
#include <bits/stdc++.h>
#define int long long
#define read(a) int a; cin >> a;
#define readarr(a, n) int a[(n) + 1] = {}; fori(i, 1, (n)) {cin >> a[i];}
#define readmat(a, n, m) int a[n + 1][m + 1] = {}; fori(i, 1, n) {fori(j, 1, m) cin >> a[i][j];}
#define pb push_back
#define fi first
#define se second
#define rz resize
#define fori(i, a, b) for(int i = a; i <= b; i++)
#define ford(i, a, b) for(int i = a; i >= b; i--)
#define mod 1000000007
#define  sort1(v) sort(v.begin(), v.end()) 
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pair <int, int>> vpi;
 
 
signed main() 
{
 
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
 
	read(n);
	readarr(a, n);
	int dp[n+1][n+1][3];
 
	int sum[n+1];
	sum[0] = 0;
	fori(i, 1, n) sum[i] = sum[i-1]+a[i];
 
	fori(i, 1, n-1)
	{
		fori(j, 1, n-i)
		{
			int k = j+i;
			if(k-j == 1) {dp[j][k][1] = max(a[j], a[k]); dp[j][k][2] = min(a[j], a[k]);}
			else
			{
				dp[j][k][1] = max(a[j] + dp[j+1][k][2], a[k] + dp[j][k-1][2]);
				dp[j][k][2] = (sum[k] - sum[j-1]) - dp[j][k][1];
			}
		}
	if(n==1) cout << a[1];
else
	cout << dp[1][n][1]-dp[1][n][2];
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:81:12: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   81 | signed main()
      |            ^~
a.cc:81:12: note: remove parentheses to default-initialize a variable
   81 | signed main()
      |            ^~
      |            --
a.cc:81:12: note: or replace parentheses with braces to value-initialize a variable
a.cc:82:1: error: a function-definition is not allowed here before '{' token
   82 | {
      | ^
a.cc:112:2: error: expected '}' at end of input
  112 | }
      |  ^
a.cc:27:1: note: to match this '{'
   27 | {
      | ^
Language: Java

import java.util.*;
import sun.misc.Unsafe;

public class Main {
    public static Unsafe getUnsafe() {
        Class cc = sun.reflect.Reflection.getCallerClass(2);
        if (cc.getClassLoader() != null)
            throw new SecurityException("Unsafe");
        return theUnsafe;
    }
    public static void main(String[] args) {
        Unsafe unsafe = getUnsafe();
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long[] a = new long[n];
        for (int i=0; i<n; i++) {
            a[i] = sc.nextInt();
        }

        long[][] dp = new long[n][n];
        for (int i=0; i<n; i++) {
            dp[i][i] = a[i];
        }

        for (int i = n - 2; i > -1; i--) {
            for (int j = i + 1; j < n; j++) {
                dp[i][j] = Math.max(a[i] - dp[i + 1][j], a[j] - dp[i][j - 1]);
            }
        }
        System.out.println(dp[0][n - 1]);
    }
}

Compiler output:
Main.java:2: warning: Unsafe is internal proprietary API and may be removed in a future release
import sun.misc.Unsafe;
               ^
Main.java:5: warning: Unsafe is internal proprietary API and may be removed in a future release
    public static Unsafe getUnsafe() {
                  ^
Main.java:6: error: cannot find symbol
        Class cc = sun.reflect.Reflection.getCallerClass(2);
                              ^
  symbol:   class Reflection
  location: package sun.reflect
Main.java:9: error: cannot find symbol
        return theUnsafe;
               ^
  symbol:   variable theUnsafe
  location: class Main
Main.java:12: warning: Unsafe is internal proprietary API and may be removed in a future release
        Unsafe unsafe = getUnsafe();
        ^
2 errors
3 warnings
Language: Java

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long[] a = new long[n];
        for (int i=0; i<n; i++) {
            a[i] = sc.nextInt();
        }

        long[] dp = new long[n * n];
        long[][] dp = new long[n][n];
        for (int i=0; i<n; i++) {
            dp[i * n + i] = dp[i]; 
        }

        for (int i = n - 2; i > -1; i--) {
            for (int j = i + 1; j < n; j++) {
                dp[i * n + j] = Math.max(a[i] - dp[(i + 1) * n + j], a[j] - dp[i * n + (j - 1)]);
            }
        }
        System.out.println(dp[n - 1]);
    }
}

Compiler output:
Main.java:13: error: variable dp is already defined in method main(String[])
        long[][] dp = new long[n][n];
                 ^
Main.java:20: error: bad operand types for binary operator '-'
                dp[i * n + j] = Math.max(a[i] - dp[(i + 1) * n + j], a[j] - dp[i * n + (j - 1)]);
                                              ^
  first type:  long
  second type: long[]
Main.java:20: error: bad operand types for binary operator '-'
                dp[i * n + j] = Math.max(a[i] - dp[(i + 1) * n + j], a[j] - dp[i * n + (j - 1)]);
                                                                          ^
  first type:  long
  second type: long[]
3 errors
Language: C++

// https://atcoder.jp/contests/dp/tasks/dp_l

#include <iostream>
#include <vector>
#include <array>
#include <unordered_map>
#include <unordered_set>

using namespace std;

void helper(const vector<long long>& points, vector<vector<vector<long long>>>& dp, int l, int r) {
	if (l > r) return;
	if (dp[l][r][0] != numeric_limits<long long>::min()) return;

	helper(points, dp, l + 1, r);
	helper(points, dp, l, r - 1);

	if (l == r) {
		dp[l][r][0] = points[l];
		dp[l][r][1] = -points[l];
	} else {
		dp[l][r][0] = max(dp[l][r - 1][1] + points[r], dp[l + 1][r][1] + points[l]);
		dp[l][r][1] = min(dp[l][r - 1][0] - points[r], dp[l + 1][r][0] - points[l]);
	}
}

int main (int argc, char* argv[]) {
	int n;
	cin >> n;

	vector<long long> points(n);
	for (int i = 0; i < n; i++) {
		cin >> points[i];
	}

	vector<vector<vector<long long>>> dp(n, vector<vector<long long>>(n, vector<long long>(2, numeric_limits<long long>::min())));
	helper(points, dp, 0, n - 1);

	cout << dp[0][n - 1][0] << endl;
}


Compiler output:
a.cc: In function 'void helper(const std::vector<long long int>&, std::vector<std::vector<std::vector<long long int> > >&, int, int)':
a.cc:13:28: error: 'numeric_limits' was not declared in this scope
   13 |         if (dp[l][r][0] != numeric_limits<long long>::min()) return;
      |                            ^~~~~~~~~~~~~~
a.cc:13:43: error: expected primary-expression before 'long'
   13 |         if (dp[l][r][0] != numeric_limits<long long>::min()) return;
      |                                           ^~~~
a.cc:13:43: error: expected ')' before 'long'
   13 |         if (dp[l][r][0] != numeric_limits<long long>::min()) return;
      |            ~                              ^~~~
      |                                           )
a.cc: In function 'int main(int, char**)':
a.cc:36:99: error: 'numeric_limits' was not declared in this scope
   36 |         vector<vector<vector<long long>>> dp(n, vector<vector<long long>>(n, vector<long long>(2, numeric_limits<long long>::min())));
      |                                                                                                   ^~~~~~~~~~~~~~
a.cc:36:74: error: expected primary-expression before '(' token
   36 |         vector<vector<vector<long long>>> dp(n, vector<vector<long long>>(n, vector<long long>(2, numeric_limits<long long>::min())));
      |                                                                          ^
a.cc:36:95: error: expected primary-expression before '(' token
   36 |         vector<vector<vector<long long>>> dp(n, vector<vector<long long>>(n, vector<long long>(2, numeric_limits<long long>::min())));
      |                                                                                               ^
a.cc:36:114: error: expected primary-expression before 'long'
   36 |         vector<vector<vector<long long>>> dp(n, vector<vector<long long>>(n, vector<long long>(2, numeric_limits<long long>::min())));
      |                                                                                                                  ^~~~
Language: C++

#include "bits/stdc++.h"
using namespace std;
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define ll long long int
#define int ll
//#define slld(t) scanf("%lld",&t)
//#define sd(t) scanf("%d",&t)
//#define pd(t) printf("%d\n",t)
//#define plld(t) printf("%lld\n",t)
#define vec vector < int >
#define vecp vector < pair < int , int > >
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define debug(x)   cerr<<#x<<": "<<x<<endl
#define pii pair < int , int >
#define pll pair < ll , ll > 
#define debug(x)   cerr<<#x<<": "<<x<<endl
#define mod  1000000007
#define N 200005
#define mod1 1000000007
#define mod2 998244353
#define bitcnt __builtin_popcount
#define PI acos(-1)
//#define endl "\n"

const int inf = (int)1e18 + 10;

int a[3003];
int dp[3003]3003];
signed main(){
  fast;
 
 int n , sum = 0;
 cin >> n;
 for(int i = 1 ; i <= n ; i++){
 	cin >> a[i];
 	sum += a[i];
 }

 for(int l = 1 ; l <= n ; l++ ){
 	for(int i = 1 ; i<= n - l + 1 ; i++){
 		if(l == 1) dp[i][i] = a[i];
 		else if(l == 2) dp[i][i+1] = max(a[i] , a[i+1]);
 		else{
 			dp[i][i+l-1] = max(a[i] + min(dp[i+1][i+l-2] , dp[i+2][i+l-1]) ,
 			                      a[i+l-1] + min(dp[i+1][i+l-2] , dp[i][i+l-3]));

 			// cout << i << " "<< (i + l-1) << " " << dp[i][i+l-1]<<endl;
 		}
 	}
 }
 
 
 int ans = dp[1][n]  - (sum - dp[1][n]);
 cout << ans << endl; 

}	

Compiler output:
a.cc:31:13: error: expected initializer before numeric constant
   31 | int dp[3003]3003];
      |             ^~~~
a.cc: In function 'int main()':
a.cc:44:28: error: 'dp' was not declared in this scope; did you mean 'dup'?
   44 |                 if(l == 1) dp[i][i] = a[i];
      |                            ^~
      |                            dup
a.cc:45:33: error: 'dp' was not declared in this scope; did you mean 'dup'?
   45 |                 else if(l == 2) dp[i][i+1] = max(a[i] , a[i+1]);
      |                                 ^~
      |                                 dup
a.cc:47:25: error: 'dp' was not declared in this scope; did you mean 'dup'?
   47 |                         dp[i][i+l-1] = max(a[i] + min(dp[i+1][i+l-2] , dp[i+2][i+l-1]) ,
      |                         ^~
      |                         dup
a.cc:56:12: error: 'dp' was not declared in this scope; did you mean 'dup'?
   56 |  int ans = dp[1][n]  - (sum - dp[1][n]);
      |            ^~
      |            dup
Language: C++

    #include <iostream>
    #include <array>
    #include <algorithm>
    #include <cstdint>
    constexpr std::size_t n_max = 3000;
    int main() {
      using std::uint32_t;
      uint32_t n, k;
      std::cin >> n >> k;
      std::array<uint32_t, n_max> h{}, dp{};
      std::generate_n(h.begin(), n, [](){
        uint32_t n;
        std::cin >> n;
        return n;
      });
      std::fill_n(dp.begin() + 1, n, 999999999);
      dp[0] = 0;
      auto abs_diff = [](uint32_t n1, uint32_t n2){ return n1 < n2 ? n2 - n1 : n1 - n2; };
      for (int i = 1; i < n; ++i) {
        for (int j = std::max(i - k, 0u); j < i; ++j) {
          dp[i] = std::min(dp[i], dp[j] + abs_diff(h[i], h[j]));
        }
      }
      std::cout << dp[n - 1] << endl;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:24:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   24 |       std::cout << dp[n - 1] << endl;
      |                                 ^~~~
      |                                 std::endl
In file included from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/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;

using int64 = long long;

template<typename T>
vector<vector<T>> Make2DVector(int d1, int d2, T default_value) {
  return vector<vector<T>>(d1, vector<T>(d2, default_value));
}

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

  int n;
  cin >> n;
  vector<int64> xs(n);
  for (int i = 0; i < n; i++) cin >> xs[i];

  vector<vector<int64>> dp = Make2DVector(n + 1, n + 1, INT64_MIN);
  function<int64(int, int)> solve = [&](int s, int t) -> int64 {
    if (dp[s][t] != INT64_MIN) return dp[s][t];

    if (s == t) return 0;
    int64 max = INT64_MIN;
    if (xs[s] - solve(s + 1, t) > max) {
      max = xs[s] - solve(s + 1, t);
    }
    if (xs[t - 1] - solve(s, t - 1) > max) {
      max = xs[t - 1] - solve(s, t - 1);
    }
    dp[s][t] = max;
    return max;
  };
  cout << solve(0, n) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:42: error: conversion from 'vector<vector<long int,allocator<long int>>,allocator<vector<long int,allocator<long int>>>>' to non-scalar type 'vector<vector<long long int,allocator<long long int>>,allocator<vector<long long int,allocator<long long int>>>>' requested
   21 |   vector<vector<int64>> dp = Make2DVector(n + 1, n + 1, INT64_MIN);
      |                              ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include<iostream>
#include<algorithm>

using namespace std;

const int NMAX = 3005;

//dp[i][j][k] = playing from ks perspective, the optimal play given the set a without [1..i] and [j..N]
//0 = Taro , 1 = Jiro
int N;
long long dp[NMAX][NMAX][2],a[NMAX];

inline long long DFS(int pref,int suf,int player)
{
    if(dp[pref][suf][player])
    {
        return dp[pref][suf][player];
    }
    else if(pref+suf == N)ac
    {
        dp[pref][suf][player] = 0;
        return dp[pref][suf][player];
    }
    else
    {
        long long v1,v2;
        DFS(pref+1 , suf , (player^1));
        DFS(pref , suf+1 , (player^1));
        if(player == 0)
        {
            v1 = a[pref+1] + dp[pref+1][suf][(player^1)];
            v2 = a[N-suf] + dp[pref][suf+1][(player^1)];
            dp[pref][suf][player] = max(v1,v2);
        }
        else
        {

            v1 = dp[pref+1][suf][(player^1)] - a[pref+1];
            v2 = dp[pref][suf+1][(player^1)] - a[N-suf];
            dp[pref][suf][player] = min(v1,v2);
        }
        return dp[pref][suf][player];
    }
}

int main()
{
    int i,j;
    cin>>N;

    for(i = 1 ; i <= N ; ++i)
        cin>>a[i];

    cout<<DFS(0,0,0);

}


Compiler output:
a.cc: In function 'long long int DFS(int, int, int)':
a.cc:19:27: error: 'ac' was not declared in this scope; did you mean 'a'?
   19 |     else if(pref+suf == N)ac
      |                           ^~
      |                           a
a.cc:44:1: warning: control reaches end of non-void function [-Wreturn-type]
   44 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define inf LLONG_MAX
int n;
int a[3005];
long long dp[3005][3005][2];
int turn = 0;

long long recur(int i, int j, int turn){
    if(i == j){
        return (turn == 0 ? a[i] : -a[i]);
    }
    int &r = dp[i][j][turn];
    if(r != inf) return dp[i][j][turn];
    if(turn == 0){
        return r = max(a[i] + recur(i+1,j,1-turn),a[j] + recur(i,j-1,1-turn));
    } else return r = min(-a[i]+recur(i+1,j,1-turn),-a[j] + recur(i,j-1,1-turn));
}

int main(){
    cin>>n;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < n; j++){
            for(int k = 0; k < 2; k++){
                dp[i][j][k] = inf;
            }
        }
    }
    for(int i = 0; i < n; i++){
        cin>>a[i];
    }
    cout<<recur(0,n-1,turn);
}


Compiler output:
a.cc: In function 'long long int recur(int, int, int)':
a.cc:13:27: error: cannot bind non-const lvalue reference of type 'int&' to a value of type 'long long int'
   13 |     int &r = dp[i][j][turn];
      |              ~~~~~~~~~~~~~^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    scanf("%d",&n);
    vector<long long>a(n);
    for(for int i=0;i<n;i++)
    {
        scanf("%lld",&a[i]);
    }
    long long dp[n+1][n+1];
    for(int L=n-1;L>=0;L--)
    {
        for(int R=0;R<n;R++)
        {
            if(L==R)
            {
                dp[L][R]=a[L];
            }
            else
            {
                dp[L][R]=max(a[L]-dp[L+1][R],a[R]-dp[L][R-1]);
            }
        }
    }
    cout<<dp[0][n-1]<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: expected primary-expression before 'for'
    8 |     for(for int i=0;i<n;i++)
      |         ^~~
a.cc:8:21: error: 'i' was not declared in this scope
    8 |     for(for int i=0;i<n;i++)
      |                     ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    scanf("%d",&n);
    vector<long long>a(n);
    for(int &x: a)
    {
        scanf("%lld",&x);
    }
    long long dp[n+1][n+1];
    for(int L=n-1;L>=0;L--)
    {
        for(int R=0;R<n;R++)
        {
            if(L==R)
            {
                dp[L][R]=a[L];
            }
            else
            {
                dp[L][R]=max(a[L]-dp[L+1][R],a[R]-dp[L][R-1]);
            }
        }
    }
    cout<<dp[0][n-1]<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: cannot bind non-const lvalue reference of type 'int&' to a value of type 'long long int'
    8 |     for(int &x: a)
      |                 ^
Language: C++

/**
    @Author:Monk78
    @Topic:OptimalGameStrategy->D-p31(geeks)
        ->Both chooses maximum element optimally
**/
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll>Vl;
typedef pair<ll,ll>PII;
typedef vector<PII>Vll;
typedef vector<pair<ll,pair<ll,ll> > >Vlll;
typedef priority_queue<ll>PQL;
typedef map<ll,ll>MP;
//#define S second;
//#define F first;
#define rep(i, begin, end) for (__typeof(end) i = (begin) - ((begin) > (end));i != (end) - ((begin) > (end)); i += 1 - 2 * ((begin) > (end)))
#define mp make_pair
#define ms(x,y) memset(x,y,sizeof(x))
#define pb push_back
#define mod 1000000009
#define MAX 100005
#define f(i,a,b) for(int i=(a);i<(b);i++)
#define rf(i,a,b) for(int i=(a);i>=b;i--)
#define sl(n) scanf("%lld",&n)
#define pl(n) printf("%lld",n)
#define vpshVar() int main()

struct Game{
    ll F,S;
    ll pick=0;
};
Game vec[3020][3020];
void fxn(ll arr[],ll N){

    for(ll i=0;i<N;i++){
        vec[i][i].F=arr[i];
        vec[i][i].pick=i;
    }
    for(ll l=2;l<=N;l++){
        for(ll i=0;i<=N-l;i++){
            ll j=i+l-1;
            if(arr[i]+vec[i+1][j].S > vec[i][j-1].S+arr[j]){
                vec[i][j].F=arr[i]+vec[i+1][j].S;
                vec[i][j].S=vec[i+1][j].F;
                vec[i][j].pick=i;
            }
            else{
                vec[i][j].F=arr[j]+vec[i][j-1].S;
                vec[i][j].S=vec[i][j-1].F;
                vec[i][j].pick=j;
            }

        }
    }
}

vpshVar(){
    ll t,N;
       ll N,sum=0;
       sl(N);
       ll arr[N];
       for(ll i=0;i<N;i++){
            sl(arr[i]);
            sum+=arr[i];
       }
       for(ll i=0;i<N+5;i++){
        for(ll j=0;j<N+5;j++){
            vec[i][j].F=vec[i][j].S=vec[i][j].pick=0;
        }
       }
       fxn(arr,N);
       cout<<vec[0][N-1].F-vec[0][N-1].S<<endl;
    }
return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:60:11: error: redeclaration of 'll N'
   60 |        ll N,sum=0;
      |           ^
a.cc:59:10: note: 'll N' previously declared here
   59 |     ll t,N;
      |          ^
a.cc: At global scope:
a.cc:75:1: error: expected unqualified-id before 'return'
   75 | return 0;
      | ^~~~~~
a.cc:76:1: error: expected declaration before '}' token
   76 | }
      | ^
Language: C++

#include<bits/stdc++.h>
#define int long long
using namespace std;
int a[3005];
int f[3005][3005];
int n;

int F(int u,int v)
{
  if(u==v){ if((n)%2) f[u][v]=a[u];
            else f[u][v]=-a[u];
          }
  if(f[u][v]) return f[u][v];
  if((u+v)%2!=n%2)
  f[u][v]=max(F(u,v-1)+a[v],F(u+1,v)+a[u]);
  else
  f[u][v]=min(F(u,v-1)-a[v],F(u+1,v)-a[u]);;

}

int main()
{


  cin>>n;
  for(int i=0;i<n;i++)
  {
    cin>>a[i];
  }

  cout<<F(0,n-1);
 // cout<<f[0][0]<<endl;
}


Compiler output:
cc1plus: error: '::main' must return 'int'
a.cc: In function 'long long int F(long long int, long long int)':
a.cc:19:1: warning: control reaches end of non-void function [-Wreturn-type]
   19 | }
      | ^
Language: C++

#include <cassert>
#include <iostream>
#include <vector>

using llong = long long;

static const int IINF = 1 << 30;
static const long long LINF = 1LL << 60;
static const long long MOD = 1.0e+9 + 7;

template <typename T> std::vector<T> vectors(std::size_t n, T val) {
  return std::vector<T>(n, val);
}

template <typename T, typename... Args>
auto vectors(std::size_t n, Args... args) {
  return std::vector<decltype(vectors<T>(args...))>(n, vectors<T>(args...));
}

template <class T> inline bool chmax(T &a, const T &b) {
  return (a < b) ? a = b, true : false;
}

template <class T> inline bool chmin(T &a, const T &b) {
  return (a > b) ? a = b, true : false;
}

template <class T> inline void chadd(T &a, const T &b) { a += b, a &= MOD; }

int main() {
  // Input
  int numArray;
  std::cin >> numArray;
  assert(1 <= numArray and numArray <= 3000);
  std::vector<llong> gain(1 + numArray);
  for (int i = 1; i <= numArray; ++i) {
    std::cin >> gain[i];
    assert(1 <= gain[i] and gain[i] <= 1.0e+9);
  }

  // Initialization
  auto dp = vectors<llong>(1 + numArray, 1 + numArray, -INF);

  // Initial condition
  for (int i = 1; i <= numArray; ++i)
    dp[i][i] = gain[i];

  // DP main
  for (int k = 0; k < numArray; ++k) {
    for (int i = 1; i <= numArray - k; ++i) {
      int j = i + k;
      assert(1 <= i and i <= j and j <= numArray);
      if (j + 1 <= numArray)
        chmax(dp[i][j + 1], gain[j + 1] - dp[i][j]);
      if (i - 1 >= 1)
        chmax(dp[i - 1][j], gain[i - 1] - dp[i][j]);
    }
  }

  // Output
  std::cout << dp[1][numArray] << std::endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:57: error: 'INF' was not declared in this scope; did you mean 'LINF'?
   42 |   auto dp = vectors<llong>(1 + numArray, 1 + numArray, -INF);
      |                                                         ^~~
      |                                                         LINF
Language: C++

#include <bits/stdc++.h>
const int INF=1e9,MOD=1e9+7;
const long long LINF=1e18;
using namespace std;
#define int long long
//template
int dp[3002][3002];
//main
signed main(){
  int N;cin>>N;
  std::vector<int> v(N);
  for(int i=0;i<N;i++)cin>>v[i];
  if(N==1){cout<<v[0]<<endl;return 0;}
  if(N%2==0){
    for(int i=0;i<=N-2;i++)dp[i][i+1]=abs(v[i]-v[i+1]);
    for(int j=3;j<=N;j++){
      for(int i=0;i<=N-j;i++){
        if(j%2)dp[i][i+j-1]=min(dp[i+1][i+j-1]-v[i],dp[i][i+j-1-1]-v[i+j-1]);
        else dp[i][i+j-1]=max(dp[i+1][i+j-1]+v[i],dp[i][i+j-1-1]+v[i+j-1]);
      }
    }
  }
  else{
    for(int i=0;i<=N-2;i++)dp[i][i+1]=(-1)*abs(v[i]-v[i+1]);
    for(int j=3;j<=N;j++){
      for(int i=0;i<=N-j;i++){
        if(j%2)dp[i][i+j-1]=max(dp[i+1][i+j-1]+v[i],dp[i][i+j-1-1]+v[i+j-1]);
        else dp[i][i+j-1]=min(dp[i+1][i+j-1]-v[i],dp[i][i+j-1-1]-v[i+j-1]);
      }
    }
  }
  for(int i=0;i<=4;i++){
    for(int j=0;j<=4;j++)//cout<<dp[i][j]<<" ";cout<<endl;
  }
  cout<<dp[0][N-1]<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:34:3: error: expected primary-expression before '}' token
   34 |   }
      |   ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
const int N = 3030;
#define ll long long
ll dp[N][N];
ll a[N];
int n;
int main(){
  cin>>n;
  ll sum = 0;
  for(int i=0;i<n;++i){
    cin>>a[i];
    sum += a[i];
  }
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
      ll x = ((i+1<=j)?dp[i+1][j]:0);
      ll y = ((j-2>=0)?dp[i][j-2]:0);
      ll z = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(a[i]+min(x,z),a[j]+min(y,z));
    }
  }
  ll ans = dp[i][j];
  ll fans = 2*ans - sum;
  cout<<fans<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:15: error: 'i' was not declared in this scope
   23 |   ll ans = dp[i][j];
      |               ^
a.cc:23:18: error: 'j' was not declared in this scope
   23 |   ll ans = dp[i][j];
      |                  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 3e5;
ll a[N];
ll dp[N][N];
int n;
int main(){
  memset(dp,0,sizeof(dp));
  cin>>n;
  for(int i=0;i<n;++i)cin>>a[i];
  ll sum = 0;
  for(int i=0;i<n;++i)sum += a[i];
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
    // Here x is value of F(i+2, j), y is F(i+1, j-1) and 
    // z is F(i, j-2) in above recursive formula 
      ll x = ((i+2<=j)?dp[i+2][j]:0);
      ll z = ((j-2>=0)?dp[i][j-2]:0);
      ll y = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(a[i]+min(x,y),a[j]+min(y,z));
    }
  }
  ll ans = dp[0][n-1];
  ll fans = 2*ans - sum;
  cout<<fans<<endl;
  return 0;
}
  

Compiler output:
/tmp/cc0oCfhI.o: in function `main':
a.cc:(.text+0x2d): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0oCfhI.o
a.cc:(.text+0x7b): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0oCfhI.o
a.cc:(.text+0xb7): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0oCfhI.o
a.cc:(.text+0x252): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0oCfhI.o
a.cc:(.text+0x265): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0oCfhI.o
a.cc:(.text+0x274): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0oCfhI.o
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 3e5;
ll a[N];
ll dp[N][N];
int n;
int main(){
  memset(dp,0,sizeof(dp));
  cin>>n;
  for(int i=0;i<n;++i)cin>>a[i];
  ll sum = 0;
  for(int i=0;i<n;++i)sum += a[i];
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
    // Here x is value of F(i+2, j), y is F(i+1, j-1) and 
    // z is F(i, j-2) in above recursive formula 
      ll x = ((i+2<=j)?dp[i+2][j]:0);
      ll z = ((j-2>=0)?dp[i][j-2]:0);
      ll y = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(a[i]+min(x,y),a[j]+min(y,z));
    }
  }
  ll ans = dp[0][n-1];
  ll fans = 2*ans - sum;
  cout<<fans<<endl;
  return;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:27:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   27 |   return;
      |   ^~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 3e5;
int a[N];
int dp[N][N];
int n;
void main(){
  memset(dp,0,sizeof(dp));
  cin>>n;
  for(int i=0;i<n;++i)cin>>a[i];
  int sum = 0;
  for(int i=0;i<n;++i)sum += a[i];
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
    // Here x is value of F(i+2, j), y is F(i+1, j-1) and 
    // z is F(i, j-2) in above recursive formula 
      int x = ((i+2<=j)?dp[i+2][j]:0);
      int z = ((j-2>=0)?dp[i][j-2]:0);
      int y = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(a[i]+min(x,y),a[j]+min(y,z));
    }
  }
  int ans = dp[0][n-1];
  int fans = 2*ans - sum;
  cout<<fans<<endl;
  return;
}
  

Compiler output:
a.cc:8:1: error: '::main' must return 'int'
    8 | void main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:27:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   27 |   return;
      |   ^~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 3e5;
int a[N];
int dp[N][N];
int n;
void main(){
  memset(dp,0,sizeof(dp));
  cin>>n;
  for(int i=0;i<n;++i)cin>>a[i];
  int sum = 0;
  for(int i=0;i<n;++i)sum += a[i];
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
    // Here x is value of F(i+2, j), y is F(i+1, j-1) and 
    // z is F(i, j-2) in above recursive formula 
      int x = ((i+2<=j)?dp[i+2][j]:0);
      int z = ((j-2>=0)?dp[i][j-2]:0);
      int y = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(a[i]+min(x,y),a[j]+min(y,z));
    }
  }
  int ans = dp[0][n-1];
  int fans = 2*ans - sum;
  cout<<fans<<endl;
  return 0;
}
  

Compiler output:
a.cc:8:1: error: '::main' must return 'int'
    8 | void main(){
      | ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 3e5;
int a[N];
int dp[N][N];
int n;
int main(){
  memset(dp,0,sizeof(dp));
  cin>>n;
  for(int i=0;i<n;++i)cin>>a[i];
  int sum = 0;
  for(int i=0;i<n;++i)sum += a[i];
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
    // Here x is value of F(i+2, j), y is F(i+1, j-1) and 
    // z is F(i, j-2) in above recursive formula 
      int x = ((i+2<=j)?dp[i+2][j]:0);
      int z = ((j-2>=0)?dp[i][j-2]:0);
      int y = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(a[i]+min(x,y),a[j]+min(y,z));
    }
  }
  int ans = dp[0][n-1];
  int fans = 2*ans - sum;
  cout<<fans<<endl;
  return 0;
}
  

Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C++

#include<bits/stdc++.h>
using namespace std;
const int N = 1110;
int a[N];
int dp[N][N];
int n;
int main(){
  memset(dp,0,sizeof(dp));
  scanf("%d",&n);
  for(int i=0;i<n;++i)cin>>a[i];
  int sum = 0;
  for(int i=0;i<n;++i)sum += a[i];
  for(int gap = 0;gap<n;++gap){
    for(int i=0,j=gap;j<n;++i,++j){
    // Here x is value of F(i+2, j), y is F(i+1, j-1) and 
    // z is F(i, j-2) in above recursive formula 
      int x = ((i+2<=j)?dp[i+2][j]:0);
      int z = ((j-2>=0)?dp[i][j-2]:0);
      int y = ((i+1<=j-1)?dp[i+1][j-1]:0);
      dp[i][j] = max(ar[i]+min(x,y),ar[j]+min(y,z));
    }
  }
  int ans = dp[0][n-1];
  int fans = 2*ans - sum;
  cout<<fans<<endl;
  return 0;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:20:22: error: 'ar' was not declared in this scope; did you mean 'a'?
   20 |       dp[i][j] = max(ar[i]+min(x,y),ar[j]+min(y,z));
      |                      ^~
      |                      a
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define mod 1000000007
ll dp[3005][3005]={0};
ll arr[3005];
ll solve(ll start,ll end)
{
	if(start>end)
		return 0;
	else if(start==end)
		dp[start][end]=arr[start];
	else if(dp[start][end])
		return dp[start][end];de
	else
		dp[start][end]=max(arr[start]-solve(start+1,end),arr[end]-solve(start,end-1));

	return dp[start][end]; 
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	//freopen("test.txt","r",stdin);
	ll n;
	cin>>n;
	for(ll i=1;i<=n;i++)
		cin>>arr[i];
	cout<<solve(1,n)<<endl;
	


}

Compiler output:
a.cc: In function 'long long int solve(long long int, long long int)':
a.cc:14:39: error: 'de' was not declared in this scope; did you mean 'dp'?
   14 |                 return dp[start][end];de
      |                                       ^~
      |                                       dp
Language: Java

import java.util.*;

public class Main
{
  static int n;
  static long[] a;
  static Long[][][] memo
  public static void main(String[]  args)
  {
	Scanner in = new Scanner(System.in);
 	n = in.nextInt();
    a = new long[n];
    for (int i = 0; i < n; i++)
      a[i] = in.nextLong();
    memo = new Long[2][n][n];
    System.out.println(dp(0, 0, n-1));
    in.close();
  }
  
  public static long dp(int who, int l, int r)
  {
    if (l == r)
      return a[l];
    if (memo[who][l][r] != null)
      return memo[who][l][r];
    long ans = (long)1e18;
    ans = Math.min(ans, a[l]-dp(1-who, l+1, r));
    ans = Math.min(ans, a[r]-dp(1-who, l, r-1));
    return memo[who][l][r] = ans;
  }
}


Compiler output:
Main.java:7: error: ';' expected
  static Long[][][] memo
                        ^
1 error
Language: Java

import java.util.*;

public class Main
{
  static int n;
  static long[] a;
  static Long[][][] memo
  public static void main(String[]  args)
  {
	Scanner in = new Scanner(System.in);
 	n = in.nextInt();
    a = new long[n];
    for (int i = 0; i < n; i++)
      a[i] = in.nextLong();
    memo = new Long[2][n][n];
    System.out.println(dp(0, 0, n-1));
    in.close();
  }
  
  public static long dp(int who, int l, int r)
  {
    if (l == r)
      return a[l];
    if (memo[who][l][r] != null)
      return memo[who][l][r];
    long ans = 0;
    ans = Math.max(ans, a[l]-dp(1-who, l+1, r));
    ans = Math.max(ans, a[r]-dp(1-who, l, r-1));
    return memo[who][l][r] = ans;
  }
}

Compiler output:
Main.java:7: error: ';' expected
  static Long[][][] memo
                        ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    int arr[n+1];
    arr[0]=0;
    for(int i=1;i<=n;i++) cin>>arr[i];
    vector<long long int> dp(n+1,0);
    int turn=((n-1)%2);
    for(int i=n;i>0;i--){
        for(int j=i;j<=n;j++){
            if((i+j)%2==0){
                if(turn==0){
                    dp[j]=max(dp[j]+arr[i],dp[j-1]+arr[j]);
                }
                else{
                    dp[j]=min(dp[j]-arr[i],dp[j-1]-arr[j]);
                }
            }
            else{
                if(turn==1){
                    dp[j]=max(dp[j]+arr[i],dp[j-1]+arr[j]);
                }
                else{
                    dp[j]=min(dp[j]-arr[i],dp[j-1]-arr[j]);
                }
            }
        }
    }
    cout<<dp[n]<<"\n;
}

Compiler output:
a.cc:34:18: warning: missing terminating " character
   34 |     cout<<dp[n]<<"\n;
      |                  ^
a.cc:34:18: error: missing terminating " character
   34 |     cout<<dp[n]<<"\n;
      |                  ^~~~
a.cc: In function 'int main()':
a.cc:35:1: error: expected primary-expression before '}' token
   35 | }
      | ^
Language: C++

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

signed main() {
  ios::sync_with_stdio(false);

  int N;
  cin >> N;
  
  vector<int> A(N);
  for (int i = 0; i < N; ++i) cin >> A[i];

  function<int64_t(int, int)> dfs = [&](int lb, int rb) {
    static int64_t dp[3001][3001];
    static bool   vis[3001][3001];
    if (vis[lb][rb]) return dp[lb][rb];
    if (lb == rb) return 0LL;
    vis[lb][rb] = 1;
    return dp[lb][rb] = max(A[lb] - dfs(lb + 1, rb), A[rb - 1] - dfs(lb, rb - 1));
  };

  cout << dfs(0, N) << endl;

  return 0;
}


Compiler output:
a.cc: In lambda function:
a.cc:17:26: error: inconsistent types 'long int' and 'long long int' deduced for lambda return type
   17 |     if (lb == rb) return 0LL;
      |                          ^~~
Language: C++

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <iomanip>
#include <string>
#include <deque>
#include <stack>
#include <cmath>

using namespace std;

#define PB push_back
#define MP make_pair
#define f first
#define s second
#define FOR(i,a,b) for (LL i = a; i < b; ++i)
#define RFOR(i, b, a) for (int i = b-1; i>=a; --i)
#define FILL(a, b) memset(a, b, sizeof a)
#define ALL(a) a.begin(), a.end()
#define SZ(a) (int)a.size()

typedef long long LL;
typedef pair<int, int> PII;
typedef vector<LL> VI;
typedef pair<LL, LL> PLL;

const int INF = 1000 * 1000 * 1000;
const LL LINF = 1LL * INF*INF;
const int MAX = 400040	;
const long double PI = acos(-1.);
const double EPS = 1e-6;
LL mod = 1000LL * 1000 * 1000 + 7;

int n,k;
LL arr[300];
LL dpT[3007][3007];
LL dp(int l, int r)
{
	if(l>r)
		return 0;
	if(l==r)
		return arr[l];
	if(dpT[l][r]!=-1LL)
		return dpT[l][r];
	LL ans = -LINF;
	ans=max(ans,arr[l]+min(dp(l+2,r)-arr[l+1],dp(l+1,r-1)-arr[r]));
	ans=max(ans,arr[r]+min(dp(l+1,r-1)-arr[l],dp(l,r-2)-arr[r-1]));
	return dpT[l][r] = ans;
}



int main()
{
	//freopen("input.tXXt", "r", stdin);
	ios_base::sync_with_stdio(0);
	FILL(dpT,-1);
	cin >> n;
	FOR(i,0,n)
		cin >> arr[i];
	cout<<dp(0,n-1,0);
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:65:17: error: too many arguments to function 'LL dp(int, int)'
   65 |         cout<<dp(0,n-1,0);
      |               ~~^~~~~~~~~
a.cc:41:4: note: declared here
   41 | LL dp(int l, int r)
      |    ^~