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

import java.math.BigInteger;
import java.util.*;
 
public class Main {
 
 
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int a[] = new int[n + 1];
        int b[] = new int[n + 1];
        for (int i = 1; i <= n; i++)
            a[i] = in.nextInt();
 
        for (int i = 1; i <= n; i++) {
            b[i] = in.nextInt();
        }
        int sum=0;int ans=0;int cnt=0;
          for(int i=1;i<=n;i++)
              for(int j=1;j<=n;j++)
              {
                  sum=a[i]+b[j];
                  cnt++;
                  if(cnt==1)ans=sum+0;
                  else
                  ans^=sum;
              }
              System.out.println(ans);
 
    }

Compiler output:
Main.java:30: error: reached end of file while parsing
    }
     ^
1 error
Language: Java

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

public classMain {


    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int a[] = new int[n + 1];
        int b[] = new int[n + 1];
        for (int i = 1; i <= n; i++)
            a[i] = in.nextInt();

        for (int i = 1; i <= n; i++) {
            b[i] = in.nextInt();
        }
        int sum=0;int ans=0;int cnt=0;
          for(int i=1;i<=n;i++)
              for(int j=1;j<=n;j++)
              {
                  sum=a[i]+b[j];
                  cnt++;
                  if(cnt==1)ans=sum+0;
                  else
                  ans^=sum;
              }
              System.out.println(ans);

    }


Compiler output:
Main.java:4: error: class, interface, enum, or record expected
public classMain {
       ^
Main.java:7: error: unnamed classes are a preview feature and are disabled by default.
    public static void main(String[] args) {
                  ^
  (use --enable-preview to enable unnamed classes)
2 errors
Language: C++

#include<algorithm>
#define l(a)std::lower_bound(B,B+n,a-A)
int n,a[2<<18],B[1<<18],s,A,i=1,j,L;main(){for(;std::cin>>(n?a[A++]:n););for(;i<1<<29;i*=2){for(j=0;j<n;)B[j]=a[n+j++]%(i*2);for(std::sort(B,B+n);j--;s^=(a[j]&i?n-L:L)%2*i)A=a[j]%i,L=l(i*2)-l(i);}std::cout<<s;}

Compiler output:
a.cc:3:37: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    3 | int n,a[2<<18],B[1<<18],s,A,i=1,j,L;main(){for(;std::cin>>(n?a[A++]:n););for(;i<1<<29;i*=2){for(j=0;j<n;)B[j]=a[n+j++]%(i*2);for(std::sort(B,B+n);j--;s^=(a[j]&i?n-L:L)%2*i)A=a[j]%i,L=l(i*2)-l(i);}std::cout<<s;}
      |                                     ^~~~
a.cc: In function 'int main()':
a.cc:3:54: error: 'cin' is not a member of 'std'
    3 | int n,a[2<<18],B[1<<18],s,A,i=1,j,L;main(){for(;std::cin>>(n?a[A++]:n););for(;i<1<<29;i*=2){for(j=0;j<n;)B[j]=a[n+j++]%(i*2);for(std::sort(B,B+n);j--;s^=(a[j]&i?n-L:L)%2*i)A=a[j]%i,L=l(i*2)-l(i);}std::cout<<s;}
      |                                                      ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include<algorithm>
  +++ |+#include <iostream>
    2 | #define l(a)std::lower_bound(B,B+n,a-A)
a.cc:3:202: error: 'cout' is not a member of 'std'
    3 | int n,a[2<<18],B[1<<18],s,A,i=1,j,L;main(){for(;std::cin>>(n?a[A++]:n););for(;i<1<<29;i*=2){for(j=0;j<n;)B[j]=a[n+j++]%(i*2);for(std::sort(B,B+n);j--;s^=(a[j]&i?n-L:L)%2*i)A=a[j]%i,L=l(i*2)-l(i);}std::cout<<s;}
      |                                                                                                                                                                                                          ^~~~
a.cc:3:202: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include<bits/stdc++.h>

using namespace std;

#define pq priority_queue
#define MZ 1000000007

int nums[30][200005];
int init[30];
int num[30];

int main()
{
    init[0]=1;
    for(int i=1;i<29;i++)
        init[i]=init[i-1]*2;
    int n,now,temp,l,r,mid,ans=0,gl,gr;
    scanf("%d",&n);
    for(int i=0;i<n;i++)
    {
        scanf("%d",&now);
        temp=0;
        for(int j=0;j<29;j++)
        {
            temp+=(now%2)*init[j];
            nums[j][i]=temp;
            now/=2;
        }
    }
    for(int i=0;i<29;i++)
        sort(nums[i],nums[i]+n);
    for(int i=0;i<n;i++)
    {
        scanf("%d",&now);
        temp=0;
        for(int j=0;j<29;j++)
        {
            temp+=(now%2)*init[j];
            if(temp+nums[j][n-1]>=init[j] && temp+nums[j][0]<2*init[j])
            {
                l=0;
                r=n-1;
                while(l!=r)
                {
                    mid=(l+r)/2;
                    if(temp+nums[mid]>=init[j])
                        r=mid;
                    else
                        l=mid+1;
                }
                gl=l;
                if(temp+nums[j][n-1]<2*init[j])
                    gr=n;
                else
                {
                    l=0;
                    r=n-1;
                    while(l!=r)
                    {
                        mid=(l+r)/2;
                        if(temp+nums[mid]>=2*init[j])
                            r=mid;
                        else
                            l=mid+1;
                    }
                    gr=l;
                }
                num[j]+=gr-gl;
            }
            if(temp+nums[j][n-1]>=3*init[j])
            {
                l=0;
                r=n-1;
                while(l!=r)
                {
                    mid=(l+r)/2;
                    if(temp+nums[j][mid]>=3*init[j])
                        r=mid;
                    else
                        l=mid+1;
                }
                num[j]+=n-l;
            }
            now/=2;
        }
    }
    for(int i=0;i<29;i++)
    {
        if(num[i]%2)
            ans+=init[i];
    }
    printf("%d\n",ans);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:46:38: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   46 |                     if(temp+nums[mid]>=init[j])
      |                        ~~~~~~~~~~~~~~^~~~~~~~~
a.cc:61:42: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   61 |                         if(temp+nums[mid]>=2*init[j])
      |                            ~~~~~~~~~~~~~~^~~~~~~~~~~
Language: C++

#include<iostream>
using namespace std;
const int maxn=2E5+77;
const int INF=(1<<30)+100;

int A[maxn],B[maxn],N,X,Mask;

bool cmp(int a,int b){ 
        return (a&Mask)<(b&Mask);
}

int count(int l,int r){ 
        int p1=lower_bound(B,B+N,l,cmp)-B,p2=upper_bound(B,B+N,r,cmp)-B;
        //cerr<<"p1:"<<p1<<", p2:"<<p2<<endl;
        //cerr<<"count:"<<p2-p1<<endl;
        return p2-p1;
}

int solve(){
        int ret=0;
        sort(A,A+N,cmp);
        sort(B,B+N,cmp);
        for(int i=0;i<N;++i){
                int l=(X-A[i])&Mask,r=(Mask-A[i])&Mask;
                //cerr<<"A[i]:"<<A[i]<<" l:"<<l<<" r:"<<r<<endl;
                if(l>r){
                        ret^=count(l,Mask)&1;
                        ret^=count(0,r)&1;
                }else{
                        ret^=count(l,r)&1;
                }   
        }   
        return ret;
}

int main(){
        scanf("%d",&N);
        for(int i=0;i<N;++i) scanf("%d",A+i);
        for(int i=0;i<N;++i) scanf("%d",B+i);

        int ans=0;
        for(X=1;X>0 && X<INF;X<<=1){
                Mask=(X<<1)-1;
                //cerr<<"X:"<<X<<" Mask:"<<Mask<<endl;
                ans^=X*solve();
        }   
        printf("%d\n",ans);
}


Compiler output:
a.cc: In function 'int count(int, int)':
a.cc:13:27: error: no matching function for call to 'lower_bound(int [200077], int*, int&, bool (&)(int, int))'
   13 |         int p1=lower_bound(B,B+N,l,cmp)-B,p2=upper_bound(B,B+N,r,cmp)-B;
      |                ~~~~~~~~~~~^~~~~~~~~~~~~
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:1530:5: note: candidate: 'template<class _ForwardIterator, class _Tp> _ForwardIterator std::lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&)'
 1530 |     lower_bound(_ForwardIterator __first, _ForwardIterator __last,
      |     ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:1530:5: note:   candidate expects 3 arguments, 4 provided
a.cc:16:16: error: 'p2' was not declared in this scope; did you mean 'p1'?
   16 |         return p2-p1;
      |                ^~
      |                p1
a.cc: In function 'int solve()':
a.cc:21:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   21 |         sort(A,A+N,cmp);
      |         ^~~~
      |         short
Language: C++

#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <deque>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <utility>
#include <vector>
#define p(s) cout<<(s)<<endl
#define REP(i,n,N) for(int i=n;i<N;i++)
#define RREP(i,n,N) for(int i=N-1;i>=n;i--)
#define CK(n,a,b) ((a)<=(n)&&(n)<(b))
#define F first
#define S second
typedef long long ll;
using namespace std;
const int inf = 1e9+7;
ll N,K;
ll a[200100],b[200100];
ll c,d;
ll ans;
int main() {
    cin>>N;
    REP(i,0,N){
        cin>>a[i];
    }
    REP(i,0,N){
        cin>>b[i];
    }
    c=a[0],d=b[0];
    REP(i,1,N){
        c = __algo_gcd(c,a[i]);
        d = __algo_gcd(d,b[i]);
    }
    p(c*d);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:13: error: '__algo_gcd' was not declared in this scope
   37 |         c = __algo_gcd(c,a[i]);
      |             ^~~~~~~~~~
Language: C++

#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
#include <cstring>
#include <deque>
#include <iomanip>
#include <limits>
#include <fstream>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
#define CLR(mat) memset(mat, 0, sizeof(mat))
typedef long long ll;
// 連続も考える
int N;
ll cnta[50][50], cntb[50][50];
ll cnt[50];
int a[50],b[50];
ll ans;
int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin>>N;
  FOR(i,0,N)cin>>a[i];
  FOR(i,0,N)cin>>b[i];
  FOR(i,0,N){
    int c=0;
    int sj=0;
    FOR(j,0,30){
      if(a[i]&(1<<j)){
        c++;
        if(c==1)sj=j;
      }else{
        if(c)cnta[sj+c-1][sj]++;
        c=0;
      }
    }
  }
  FOR(i,0,N){
    int c=0;
    int sj=0;
    FOR(j,0,30){
      if(b[i]&(1<<j)){
        c++;
        if(c==1)sj=j;
      }else{
        if(c)cntb[sj+c-1][sj]++;
        c=0;
      }
    }
  }
  FOR(la,0,30){
    for(int ra=la;ra>=0;ra--){
      FOR(lb,0,30){
        for(int rb=lb;rb>=0;rb--){
          int m=0;
          FOR(i,0,30){
            if(i>=ra&&i<=la&&(i<rb||i>lb&&!m)cnt[i]+=cnta[la][ra]*cntb[lb][rb];
            if(i>=rb&&i<=lb&&(i<ra||i>la&&!m)cnt[i]+=cnta[la][ra]*cntb[lb][rb];
            if(i>=ra&&i>=rb&&i<=la&&i<=lb){
              if(m==0)m++;
              else{
                cnt[i]+=cnta[la][ra]*cntb[lb][rb];
              }
            }
            if(i>la&&i>lb&&m){
              cnt[i]+=cnta[la][ra]*cntb[lb][rb];
              break;
            }
          }
        }
      }
    }
  }
  FOR(i,0,30){
    //cout<<cnt[i]<<endl;
    if(cnt[i]%2==1){
      ll p = 1;
      FOR(j,0,i)p*=2;
      ans += p;
    }
  }
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:69:46: error: expected ';' before 'cnt'
   69 |             if(i>=ra&&i<=la&&(i<rb||i>lb&&!m)cnt[i]+=cnta[la][ra]*cntb[lb][rb];
      |                                              ^~~
      |                                              ;
a.cc:70:13: error: expected primary-expression before 'if'
   70 |             if(i>=rb&&i<=lb&&(i<ra||i>la&&!m)cnt[i]+=cnta[la][ra]*cntb[lb][rb];
      |             ^~
a.cc:69:80: error: expected ')' before 'if'
   69 |             if(i>=ra&&i<=la&&(i<rb||i>lb&&!m)cnt[i]+=cnta[la][ra]*cntb[lb][rb];
      |               ~                                                                ^
      |                                                                                )
   70 |             if(i>=rb&&i<=lb&&(i<ra||i>la&&!m)cnt[i]+=cnta[la][ra]*cntb[lb][rb];
      |             ~~
Language: C++

#include<bits/stdc++.h>
#define int long long
#define r(i,n) for(int i=0;i<n;i++)
using namespace std;
typedef pair<int,int>P;
#define fi first
#define se second
int n,a[200009],b[200009],dp0[32],dp1[32];
vector<int>v1,v2;
int pre[30][30];
int SUM[30];
int dp[30][30],ad[32];
signed main(){
    cin>>n;
    r(i,n)cin>>a[i];
    r(i,n)cin>>b[i];
    r(i,n){
        r(j,30)r(k,30)dp[j][k]=pre[j][k];
        int sum=0;
        r(j,30){
            if((1<<j)&a[i]){
                r(k,30){
                    if(!dp[j][k]){
                        SUM[j]-=dp[j][k];
                        SUM[k]+=dp[j][k];
                        for(int l=j+1;l<k;l++){
                            SUM[l]-=dp[j][k];
                        }
                    }
                }
            }
            if(!((1<<j)&a[i])&&SUM[j]%2)sum|=(1<<j);
            if(((1<<j)&a[i])&&SUM[j]%2==0)sum|=(1<<j);
        }
        ans^=sum;
    }
    cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   35 |         ans^=sum;
      |         ^~~
      |         abs
a.cc:37:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   37 |     cout<<ans<<endl;
      |           ^~~
      |           abs
Language: C++

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

long a[200000];
long b[200000];
int main(void){
    long n;
    cin >> n;
    for(long i=0; i<n; i++){
        cin >> a[i];
    }
    for(long i=0; i<n; i++){
        cin >> b[i];
    }
    long s=0;
    for(long i=0; i<n; i++){
        long t=a[i]
        for(long j=0; j<n; j++){
            s ^= t+b[j];
        }
    }
    cout << s << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: expected ',' or ';' before 'for'
   18 |         for(long j=0; j<n; j++){
      |         ^~~
a.cc:18:23: error: 'j' was not declared in this scope
   18 |         for(long j=0; j<n; j++){
      |                       ^
Language: C++

#include <iostream>
using namespace std;
typedef long long LL;
const int N = 200000 + 10;
int n;
LL a[N], b[N];
LL x[N], y[N];
LL add[N];
int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i ++) {
        scanf("%lld", &a[i]);
    }
    for (int i = 1; i <= n; i ++) {
        scanf("%lld", &b[i]);
    }

    LL ans = 0;
    for (int bit = 0; bit < 29; bit ++) {
        for (int i = 1; i <= n; i ++) {
            x[i] = a[i] & ( (1 << (bit+1)) - 1 );
            y[i] = b[i] & ( (1 << (bit+1)) - 1 );
        }
        sort(x+1, x+1+n);
        sort(y+1, y+1+n);
        for (int i = 1; i <= n; i ++) {
            int pos = lower_bound(y+1, y+1+n, (1<<(bit+1))-x[i]) - y - 1;
            pos = n - pos;
            add[bit+1] += pos;
        }
    }


    for (int bit = 0; bit < 29; bit ++) {
        LL cnt1 = 0, cnt2 = 0;
        for (int i = 1; i <= n; i ++) {
            if ((a[i] >> bit) & 1) cnt1 ++;
            if ((b[i] >> bit) & 1) cnt2 ++;
        }
        LL cnt = cnt1 * (n - cnt2) + cnt2 * (n - cnt1) + add[bit];
        if (cnt % 2) ans += (1 << bit);
    }
    printf("%lld\n", ans);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   24 |         sort(x+1, x+1+n);
      |         ^~~~
      |         short
Language: C++

#include<bits/stdc++.h>
#define int64_t lld
using namespace std;
#define pb push_back
vector<int> v,o[2], a[2]; int64_t sum[2] = {}, c[2]={};
signed main(){
  int n;
  cin >> n;
  for(int i = 0; i < n; i++){
    int x;
    cin >> x;
    v.pb(x);
  }
  auto it = max_element(v.begin(), v.end());
  if(*it <= 0){
	  cout << *it << endl << n-1 << endl;
	  for(int i = n; i > it-v.begin()+1;i--)cout << i << endl;
	  while(it != v.begin())cout << 1 << endl, it--;
  		return 0;
  }

  for(int i = 0; i < n; i++){
    int x = v[i];
    if(x > 0)sum[i%2]+=x;
    else o[i%2].pb(i), c[i%2]++;
    a[i%2].pb(i-c[1-i%2]*2);
  }
  int xx = sum[0] > sum[1];
  a[xx].erase(unique(a[xx].begin(), a[xx].end()), a[xx].end());
  cout << sum[1^xx] << endl << (a[xx].size()+o[1^xx].size()) << endl;
  for(int i = o[1^xx].size()-1; i >= 0; i--)cout << o[1^xx][i]+1 << endl;
  for(int i = a[xx].size()-1; i >= 0; i--)cout << a[xx][i]+1 << endl;
  }



Compiler output:
a.cc:2:17: error: 'lld' does not name a type
    2 | #define int64_t lld
      |                 ^~~
a.cc:5:27: note: in expansion of macro 'int64_t'
    5 | vector<int> v,o[2], a[2]; int64_t sum[2] = {}, c[2]={};
      |                           ^~~~~~~
a.cc:5:46: error: expected unqualified-id before ',' token
    5 | vector<int> v,o[2], a[2]; int64_t sum[2] = {}, c[2]={};
      |                                              ^
a.cc:5:52: error: expected constructor, destructor, or type conversion before '=' token
    5 | vector<int> v,o[2], a[2]; int64_t sum[2] = {}, c[2]={};
      |                                                    ^
a.cc: In function 'int main()':
a.cc:24:14: error: 'sum' was not declared in this scope
   24 |     if(x > 0)sum[i%2]+=x;
      |              ^~~
a.cc:25:24: error: 'c' was not declared in this scope
   25 |     else o[i%2].pb(i), c[i%2]++;
      |                        ^
a.cc:26:17: error: 'c' was not declared in this scope
   26 |     a[i%2].pb(i-c[1-i%2]*2);
      |                 ^
a.cc:28:12: error: 'sum' was not declared in this scope
   28 |   int xx = sum[0] > sum[1];
      |            ^~~
Language: C++

#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
int N;
long A[1000];
long dp[1000][1000],ep[1000],parent[1000];
main()
{
	cin>>N;
	for(int i=0;i<N;i++)cin>>A[i];
	for(int i=0;i<N;i++)
	{
		dp[i][0]=max(0L,A[i]);
		ep[i]=max(0L,A[i]);
		for(int j=i-2;j>=0;j-=2)
		{
			dp[i][j]=max(dp[i][j],ep[j]+A[i]);
			if(ep[i]<dp[i][j])
			{
				ep[i]=dp[i][j];
				parent[i]=j;
			}
		}
	}
	int id=0;
	for(int i=1;i<N;i++)
	{
		if(ep[id]<ep[i])id=i;
	}
	cout<<ep[id]<<endl;
	vector<int>x;
	long now=ep[id];
	do
	{
		now-=A[id];
		x.push_back(id);
		id=parent[id];
	}while(now!=0)
	reverse(x.begin(),x.end());
	vector<int>ans;
	for(int i=N-1;i>x[x.size()-1];i--)ans.push_back(i);
	for(int i=(int)x.size()-2;i>=0;i--)
	{
		int t=(x[i+1]-x[i])/2;
		for(;t>0;t--)
		{
			ans.push_back(x[i]+t);
		}
	}
	for(int i=x[0]-1;i>=0;i--)ans.push_back(0);
	cout<<ans.size()<<endl;
	for(int i:ans)cout<<i+1<<endl;
}

Compiler output:
a.cc:8:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    8 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:39:23: error: expected ';' before 'reverse'
   39 |         }while(now!=0)
      |                       ^
      |                       ;
   40 |         reverse(x.begin(),x.end());
      |         ~~~~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

const int N=1050;

long long a[N],x,y;
int b[N],t;
int n,p;

int main(){
	scanf("%d",&n);
	for (int i=1;i<=n;++i) scanf("%lld",&a[i]);
	x=y=0;p=1;
	for (int i=1;i<=n;i+=2) 
		if (a[i]>0) x+=a[i];
	for (int i=2;i<=n;i+=2)
		if (a[i]>0) y+=a[i];
	for (int i=2;i<=n;++i)
		if (a[i]>a[p]) p=i;
	if (a[p]<=0){
		printf("%lld\n",a[p]);
		printf("%d\n",n-1);
		for (int i=n;i>=p+1;--i) printf("%d\n",i);
		for (int i=1;i<p;++i) puts("1"); 
		return 0;
	}
	p=0;t=0;
	if (x>=y){
		printf("%lld\n",x);
		for (int i=2;i<=n;++i)
			if (i&1 && a[i]<0){
				b[++t]=i-p;p+=2;
			}
		if (a[1]<0){
			b[++t]=1;b[++t]=1;p+=2;
		}
		for (int i=1;i<n-p;i+=2) b[++t]=2;
	}
	else{
		printf("%lld\n",y);
		for (int i=1;i<n;++i)
			if ((i&1)==0 && a[i]<0){
				b[++t]=i-p;p+=2;
			}
		if (a[n]<0) b[++t]=i-p,p++;
		b[++t]=1;p++;
		for (int i=1;i<n-p;i+=2) b[++t]=2;
	}
	printf("%d\n",t);
	for (int i=1;i<=t;++i) printf("%d\n",b[i]); 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:46:36: error: 'i' was not declared in this scope
   46 |                 if (a[n]<0) b[++t]=i-p,p++;
      |                                    ^
Language: C++

#include<iostream>
using namespace std;
long long a[1005];
int n ,f = 1,num=0,b[1005];
long long tdl(int i) {
	if ((i - f) % 2 == 1)return a[i];
	else return 0;
}
void dl(int i) {
	num++; b[num] = i;
	if (i == n) {
		n--;
		return;
	}
	if (i == 1) {
		n--;
		for (int j = 1; j <= n; j++)
			a[j] = a[j + 1];
		return;
	}
	n -= 2;
	a[i - 1] += a[i + 1];
	for (int j = i; j <= n; j++)
		a[j] = a[j + 2];
	return;
}
int main()
{
	cin >> n;
	for (int i = 1; i <= n; i++)
		scanf_s("%lld", &a[i]);
	while (n != 1) {
		long long o = 0, e = 0, m = -9999999999;
		int  im = 0;
		for (int i = 1; i <= n; i++) {
			if (a[i] >= m) {
				m = a[i];
				im = i;
			}
		}
		if (m <= 0) {
			a[1] = m; num = n - 1;
			for (int i = 1; i <= im - 1; i++)b[i] = 1;
			for (int i = im; i < n; i++)b[i] = n + 1 - i;
			break;
		}
		for (int i = 1; i <= n; i++){
			if (a[i] >= 0) {
				if (i % 2 == 1)o += a[i];
				else e += a[i];
			}
	    }
		if (o > e)f = 0;
		m = 1; im = 0;
		for (int i = 1; i <= n; i++) {
			if (tdl(i) < m) {
				im = i; m = tdl(i);
			}
		}
		dl(im);
	}
	printf("%lld\n%d", a[1],num);
	for (int i = 1; i <= num; i++) {
		printf("\n%d", b[i]);
	}
	return 0;}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:17: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   31 |                 scanf_s("%lld", &a[i]);
      |                 ^~~~~~~
      |                 scanf
Language: C++

#include<iostream>
using namespace std;
long long a[1005];
int n ,f = 1,num=0,b[1005];
long long tdl(int i) {
	if ((i - f) % 2 == 1)return a[i];
	else return 0;
}
void dl(int i) {
	num++; b[num] = i;
	if (i == n) {
		n--;
		return;
	}
	if (i == 1) {
		n--;
		for (int j = 1; j <= n; j++)
			a[j] = a[j + 1];
		return;
	}
	n -= 2;
	a[i - 1] += a[i + 1];
	for (int j = i; j <= n; j++)
		a[j] = a[j + 2];
	return;
}
int main()
{
	cin >> n;
	for (int i = 1; i <= n; i++)
		scanf("%lld", &a[i]);
	while (n != 1) {
		long long o = 0, e = 0, m = -9999999999;
		int  im = 0;
		for (int i = 1; i <= n; i++) {
			if (a[i] >= m) {
				m = a[i];
				im = i;
			}
		}
		if (m <= 0) {
			a[1] = m; num = n - 1;
			for (int i = 1; i <= im - 1; i++)b[i] = 1;
			for (int i = im; i < n; i++)b[i] = n + 1 - i;
			break;
		}
		for (int i = 1; i <= n; i++){
			if (a[i] >= 0) {
				if (i % 2 == 1)o += a[i];
				else e += a[i];
			}
	    }
		if (o > e)f = 0;
		m = 1; im = 0;
		for (int i = 1; i <= n; i++) {
			if (tdl(i) < m) {
				im = i; m = tdl(i);
			}
		}
		dl(im);
	}
	printf("%lld\n%d", a[1],num);
	for (int i = 1; i <= num; i++) {
		printf("\n%d", b[i]);
	}
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:66:18: error: expected '}' at end of input
   66 |         return 0;
      |                  ^
a.cc:28:1: note: to match this '{'
   28 | {
      | ^
Language: C++

#include<iostream>
#include<stdio.h>
 using namespace std;
 long long a[1005];
 int n = 0; int flg = 0;
 int b[1005], num = 0;;
 long long testdel(int i) {
	 if ((i - flg) % 2 == 1)return a[i];
	 else return 0;
 }
 void del(int i) {
	 num++; b[num] = i;
	 if (i == n) {
		 n--;
		 return;
	 }
	 if (i == 1) {
		 n--;
		 for (int j = 1; j <= n; j++)
			 a[j] = a[j + 1];
		 return;
	 }
	 n = n - 2;
	 a[i - 1] = a[i - 1] + a[i + 1];
	 for (int j = i; j <= n; j++)
		 a[j] = a[j + 2];
	 return;
 }
int main() 
{
	 cin >> n;
	 for (int i = 1; i <= n; i++)
		 scanf_s("%lld",&a[i]);


	 while (n != 1) {
		 long long sumo = 0, sume = 0;
		 long long m = -9999999999;int  im = 0;;

		 for (int i = 1; i <= n; i++) {
			 if (a[i] >= m) {
				 m = a[i];
				 im = i;
			 }
		 }

		 if (m < 0) {
			 a[1] = m; num = n - 1;
			 for (int i = 1; i <= im - 1; i++)b[i] = 1;
			 for (int i = im; i < n; i++)b[i] = i - im + 2;
			 break;
		 }

		 for (int i = 1; i <= n; i = i + 2)if (a[i] >= 0)sumo += a[i];
		 for (int i = 2; i <= n; i = i + 2)if (a[i] >= 0)sume += a[i];
		 if (sumo > sume)flg = 0;
		 else flg = 1;

		 m = 1; im = 0;
		 for (int i = 1; i <= n; i++) {
			 if (testdel(i) < m) {
				 im = i; m = testdel(i);
			 }
		 }
		 del(im);
	 }

	 printf("%lld\n",a[1]);
	 cout << num ;
	 for (int i = 1; i <= num; i++) {
		 printf("\n%d", b[i]);
	 }
	 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:18: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   33 |                  scanf_s("%lld",&a[i]);
      |                  ^~~~~~~
      |                  scanf
Language: C++

#include"bits/stdc++.h"
using namespace std;
#define int long long
#define rep(i,n) for(int i=0;i<n;i++)
const long long mod = 1000000007;
const long long inf = 1ll << 61;
typedef pair<int, int> P;
typedef pair<int,P> PP;
struct edge { int to; int cost; };

int a[1005];

signed main(){
	int n;cin>>n;
	rep(i,n)cin>>a[i];
	int flg=0;
	int  os=0,es=0;
	rep(i,n){
		if(i&1)os+=a[i];
		else es+=a[i];
		if(a[i]>=0)flg++;
		}
	if(!flg){
		int mx=-inf,ps;
		rep(i,n){
			if(mx<a[i]){
				mx=a[i];
				ps=i;
				}
			}
			cout<<mx<<endl;
			rep(i,ps)cout<<1<<endl;
			for(int i=n-ps;i>=2;i--)cout<<i<<endl;
		}
	else{
		cout<<max(os,es)<<endl;
		if(os>es)cout<<1<<endl
		while(n!=1){
			
			}
		}	
	}


Compiler output:
a.cc: In function 'int main()':
a.cc:37:39: error: expected ';' before 'while'
   37 |                 if(os>es)cout<<1<<endl
      |                                       ^
      |                                       ;
   38 |                 while(n!=1){
      |                 ~~~~~
Language: C++

#include <bits/stdc++.h>

bool allMinus(std::vector<long long>&);

int main()
{
	int n;
	scanf("%d", &n);
	std::vector<long long> a(n);
	long long sum[2]{};
	for (auto& e: a) scanf("%lld", &e);
	if (allMinus(a))
	{
		int max_i{};
		for (int i{}; i < n; i++)
			if (a[i] > a[max_i])
				max_i = i;
		printf("%lld\n", a[max_i]);
		printf("%d\n", n - 1);
		for (int i{n - 1}; i > i_max; i--)
			printf("%d\n", i + 1);
		for (int i{}; i < i_max; i++)
			puts("1");
		return 0;
	}
	for (int ini{}; ini < 2; ini++)
		for (int a_i{n - 1 - ini}; a_i >= 0; a_i -= 2)
			if (a[a_i] >= 0)
				sum[ini] += a[a_i];
	if (sum[1] > sum[0])
	{
		std::vector<int> erase;
		for (int i{n - 2}; i >= 0; i -= 2)
			if (a[i] <= 0)
				erase.push_back(i + 1);
			else
				erase.push_back(i + 2);
		if (n & 1) erase.push_back(1);
		printf("%lld\n", sum[1]);
		printf("%d\n", erase.size());
		for (auto& e: erase) printf("%d\n", e);
	}
	else
	{
		std::vector<int> erase;
		if (a.back() <= 0) erase.push_back(n);
		for (int i{n - 3}; i >= 0; i -= 2)
			if (a[i] <= 0)
				erase.push_back(i + 1);
			else
				erase.push_back(i + 2);
		if (~n & 1) erase.push_back(1);
		printf("%lld\n", sum[0]);
		printf("%d\n", erase.size());
		for (auto& e: erase) printf("%d\n", e);
	}

	return 0;
}

bool allMinus(std::vector<long long>& a)
{
	for (auto& e: a)
		if (e >= 0)
			return false;
	return true;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:40: error: 'i_max' was not declared in this scope
   20 |                 for (int i{n - 1}; i > i_max; i--)
      |                                        ^~~~~
a.cc:22:35: error: 'i_max' was not declared in this scope
   22 |                 for (int i{}; i < i_max; i++)
      |                                   ^~~~~
Language: C++

#include<bits/stdc++.h>
#define N 500005
#define int long long
using namespace std;
int n,pos=1,tot,ans,op[N],a[N],b[2][N],len[2],res[2];
void solve(){
	for(int i=1;i<b[pos][1];i++) op[++tot]=1;
	for(int i=n;i>b[pos][len[pos]];i--) op[++tot]=i-b[pos][1]+1;
	for(int i=2;i<=len[pos];i++){
		int sz=(b[pos][i]-b[pos][i-1])/2;
		for(int j=sz+1;j>1;j--) op[++tot]=j;
	}
}
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d",&a[i]);
		if(a[i]>a[pos]) pos=i;
	}
	if(a[pos]<=0){
		res[0]=a[pos];
		b[0][++len[0]]=pos;
		pos=0;
	}
	else {
		for(int i=1;i<=n;i+=2) if(a[i]>0) b[0][++len[0]]=i,res[0]+=a[i];
		for(int i=2;i<=n;i+=2) if(a[i]>0) b[1][++len[1]]=i,res[1]+=a[i];
		if(res[0]>res[1]) pos=0;
		else pos=1;
	}
	solve();
	printf("%lld\n%d\n",res[pos],tot);
	for(int i=1;i<=tot;i++) printf("%d\n",op[i]);
	return 0;
}

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

#include <bits/stdc++.h>
#define mk make_pair
#define fs first
#define sc second
using namespace std;
typedef long long ll;
typedef long double ld;
ll mem[1010][1010], a[1010], n;
ll dp(int x, int y){
  if(x==y)
    return a[x];
  if(mem[x][y]!=-1)
    return mem[x][y];
  ll res=(-1e14);
  if(x==1)
    res=max(res, a[y]);
  if(y==n)
    res=max(res, a[x]);
  if(x==1&&y==n){
    for(int i=x; i<=y; ++i)
      res=max(res, a[i]);
  }
  for(int i=x+1; i<=y-1; ++i){
    if()
    res=max(res, dp(x, i-1)+dp(i+1,y));
  }
  mem[x][y]=res;
  return res;
}
int main(){
  while(cin>>n){
    memset(mem, -1, sizeof mem);
    for(int i=1; i<=n; ++i)
      cin>>a[i];
    ll ans=dp(1,n);
    cout<<ans<<endl;
  }
  return 0;
}




Compiler output:
a.cc: In function 'll dp(int, int)':
a.cc:24:8: error: expected primary-expression before ')' token
   24 |     if()
      |        ^
Language: C++

#include <bits/stdc++.h>
#define FI first
#define SE second
#define VE vector<int>
#define PB push_back
#define PA pair<int,int>
#define MA make_pair
#define LLI long long int
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define ROF(i,a,b) for(int i=b-1;i>=a;i--)
#define YES(i) cout<<(i?"YES":"NO")<<endl
#define Yes(i) cout<<(i?"Yes":"No")<<endl
#define POS(i) cout<<(i?"POSSIBLE":"IMPOSSIBLE")<<endl
#define Pos(i) cout<<(i?"Possible":"Impossible")<<endl
#define fcout cout<<fixed<<setprecision(10)
using namespace std;
//
const int INF=1e9+7;
const int MOD=1e9+7;
//
int main(){
	int n; cin>>n;
	LLI a[1000];
	int b[1000],sum[2]={};
	FOR(i,0,n){
		cin>>a[i];
		sum[a[i]%2]+=max(0,a[i]);
	}
	int k=(sum[0]<sum[1]);
	cout<<max(sum[0],sum[1])<<endl;
	VE v;
	ROF(i,0,n){
		if()
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:33: error: no matching function for call to 'max(int, long long int&)'
   27 |                 sum[a[i]%2]+=max(0,a[i]);
      |                              ~~~^~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:27:33: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   27 |                 sum[a[i]%2]+=max(0,a[i]);
      |                              ~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: 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:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:27:33: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   27 |                 sum[a[i]%2]+=max(0,a[i]);
      |                              ~~~^~~~~~~~
a.cc:33:20: error: expected primary-expression before ')' token
   33 |                 if()
      |                    ^
a.cc:34:9: error: expected primary-expression before '}' token
   34 |         }
      |         ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> P;

int main(){
  int N;
  cin >> N;
  vector<LL> A,ans;
  LL o=0,e=0;
  P p=make_pair(-(1LL<<62),0);
  for(int i=0;i<N;i++){
    LL a;
    cin >> a;
    A.push_back(a);
    if(p.first<a) p=make_pair(a,i);
    if(i%2) e+=max(0LL,a);
    else o+=max(0LL,a);
  }
  if(p.first<=0){
    cout << p.first << endl;
    cout << N-1 << endl;
    for(int i=0;i<p.second;i++){
      cout << i+1 << endl;
    }
    for(int i=N-1;i>p.second;i--){
      cout << i+1 << endl;
    }
    return 0;
  }
  if(o>=e) cout << o << endl;
  else{
    cout << e << endl;
    cout << 1 << endl;
    A.erase(A.begin());
  }
  while(!A.empty()){
    if(A.size()==1) break;
    if(A.size()==2){
      if(A[0]<A[1]) ans.push_back(1);
      else ans.push_back(2);
      break;
    }
    if(A[0]<=0){
      ans.push_back(1)
      ans.push_back(1)
      A.erase(A.begin());
      A.erase(A.begin());
    }
    else if(A[2]<=0){
      ans.push_back(3)
      A[3]+=A[1];
      A.erase(A.begin()+1);
      A.erase(A.begin()+1);
    }
    else{
      ans.push_back(2);
      A[2]+=A[0];
      A.erase(A.begin());
      A.erase(A.begin());
    }
  }
  cout << ans.size() << endl;
  for(int i=0;i<ans.size();i++){
    cout << ans[i] << endl;
  }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:45:23: error: expected ';' before 'ans'
   45 |       ans.push_back(1)
      |                       ^
      |                       ;
   46 |       ans.push_back(1)
      |       ~~~              
a.cc:51:23: error: expected ';' before 'A'
   51 |       ans.push_back(3)
      |                       ^
      |                       ;
   52 |       A[3]+=A[1];
      |       ~
Language: C++

#include<cstdio>
int a[1005],n,ans[1005],cnt;
long long sum[2];
int main(){
	scanf("%d",&n);bool t=0;
	for(int i=1;i<=n;++i)scanf("%d",a+i),a[i]>0?(t=1):0;
	if(n==2){printf("%d\n1\n%d\n",a[1]>a[2]?a[1]:a[2],a[1]>a[2]?2:1);return 0;}
	if(!t){
		int Max=1;for(int i=2;i<=n;++i)if(a[i]>a[Max])Max=i;
		printf("%d\n%d\n",a[Max],n-1);
		for(int i=1;i<Max;++i)puts("1");
		for(int i=n;i>=Max)printf("%d\n",n-Max+1);
		return 0;
	}
	for(int i=1;i<=n;++i)if(a[i]>0)sum[i&1]+=a[i];
	if(sum[1]>sum[0]){
		printf("%lld\n",sum[1]);
		if(n&1==0)ans[++cnt]=n--;
		bool ok=1;
		for(int i=n;i>=1;i-=2)if(a[i]<0)
			if(ok)ans[++cnt]=i,ans[++cnt]=i-1;
			else ans[++cnt]=i,i==1?(ans[++cnt]=1):0;
		else if(ok)ok=0;
			else ans[++cnt]=i+1;
	}
	else{
		printf("%lld\n",sum[0]);
		if(n&1==1)ans[++cnt]=n--;
		bool ok=1;
		for(int i=n;i>=1;i-=2)if(a[i]<0)
			if(ok)ans[++cnt]=i,ans[++cnt]=i-1;
			else ans[++cnt]=i;
		else if(ok)ok=0;
			else ans[++cnt]=i+1;
		ans[++cnt]=1;
	}
	printf("%d\n",cnt);
	for(int i=1;i<=cnt;++i)printf("%d\n",ans[i]);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:35: error: expected ';' before ')' token
   12 |                 for(int i=n;i>=Max)printf("%d\n",n-Max+1);
      |                                   ^
      |                                   ;
Language: Java

import java.util.*;
import java.util.stream.Stream;

public class Main{
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = Integer.parseInt(sc.nextLine());
        int[] a = Stream.of(sc.nextLine().split(" ")).mapToInt(Integer::parseInt).toArray();
        
        boolean allneg = true;
        for(int i=0; i<n; i++){
            if(a[i]>=0) allneg = false;
        }
        
        ArrayList<Integer> ans = new ArrayList<>();
        long max = -10_000_000_000_000L;
        
        if(!allneg){
            boolean[][] mi = new boolean[2][n/2+1];
            long[] scr = new long[2];
            for(int i=0; i<2; i++){
                for(int j=i; j<n; j+=2){
                    if(a[j]<0){
                        mi[i][j/2] = true;
                    }else{
                        scr[i] += a[j];
                    }
                }
            }
            int idx = (scr[0] > scr[1])? 0:1;
            max = scr[idx];
            //
            int size = n;
            
            if(idx==1){
                ans.add(1);
                size -= 1;
            }
            
            if(size%2==0){
                ans.add(size);
                size -= 1;
            }
            
            for(int i=n/2; i>=0; i--){
                if(mi[idx][i]){
                    int t = i*2+1;
                    ans.add(t);
                    if(t == 1){
                        ans.add(t);
                    }else if(t == size){
                        ans.add(t-1)
                    }
                    size -= 2;
                }
            }
            
            while(size>1){
                ans.add(2);
                size -= 2;
            }
        }else{
            int idx = 0;
            for(int i=0; i<n; i++){
                if(a[i] > max){
                    max = a[i];
                    idx = i;
                }
            }
            for(int i=0; i<idx; i++){
                ans.add(1);
            }
            for(int i=n-idx; i>1; i--){
                ans.add(i);
            }
        }
        
        System.out.println(max);
        System.out.println(ans.size());
        for(int i=0; i<ans.size(); i++){
            System.out.println(ans.get(i));
        }
    }
}


Compiler output:
Main.java:54: error: ';' expected
                        ans.add(t-1)
                                    ^
1 error
Language: C++

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
typedef long long ll;
ll f[1005],a[1005];
int n,pre[1005][1005],s[1005],top,mxl,mxr;
void dfs(int now){
	if(now==mxl) return;
	int T=pre[mxl][now];
	int o=now-T>>1;
	for(int i=1;i<o;i++) s[++top]=T+2;
	s[++top]=T+1;
	dfs(T);
}
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++) scanf("%lld",&a[i]);
	ll ans=-1e15;
	for(int i=1;i<=n;i++){
		for(int p=i;p<=n;p++) f[p]=-1e15;
		f[i]=a[i];
		if(f[i]>ans) ans=f[i],mxl=i,mxr=i;
		ll mx[2]={a[i],-1e15};int fr[2]={i,0};
		for(int p=i+2;p<=n;p++){
			f[p]=mx[p-i&1]+a[p];
			pre[i][p]=fr[p-i&1];
			if(f[p]>mx[p-i&1]) mx[p-i&1]=f[p],fr[p-i&1]=p;
			if(f[p]>ans) ans=f[p],mxl=i,mxr=p;
		}
	}
	printf("%lld\n",ans);
	for(int i=n;i>mxr;i--) s[++top]=i;
	dfs(mxr);
	for(int i=1;i<mxl;i++) s[++top]=i;
	printf("%d\n",top);
	for(int i=1;i<=top;i++) printf("%d\n",s[i]);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:32: error: narrowing conversion of '-1.0e+15' from 'double' to 'll' {aka 'long long int'} [-Wnarrowing]
   24 |                 ll mx[2]={a[i],-1e15};int fr[2]={i,0};
      |                                ^~~~~
Language: C++

#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <algorithm>
#include <numeric>
#include <utility>
#include <sys/time.h>
#include <cmath>
#include <tuple>
#include <queue>
#include <bitset>

using namespace std;

void solve(long long N, vector<long long> a){
    bool odd;
    long long odd_v = 0;
    long long even_v = 0;
    int r;
    int l = 0;
    vector<int> ret;
    for (int i = 0; i < N; i++) {
        if (a[i] > 0) {
            if (i%2 == 0) {
                even_v += a[i];
            } else {
                odd_v += a[i];
            }
        }
    }
    if (even_v == 0 && odd_v == 0) {  // when all negative
        long long ret_v = (int)-1e11;
        int ret_idx;
        for (int i = 0; i < N; i++) {
            if (a[i] > ret_v) {
                ret_v = a[i];
                ret_idx = i;
            }
        }
        std::cout << ret_v << std::endl;
        std::cout << N-1 << std::endl;
        for (int i = N; i > ret_idx+1; i--) {
            std::cout << i << std::endl;
        }
        for (int i = 0; i < ret_num; i++) {
            std::cout << 1 << std::endl;
        }
        return;
    }

    if (even_v > odd_v) {
        odd = false;
    } else {
        odd = true;
    }
    while (r < N) {
        if (odd) {
            if (a[l] < 0 || l%2 == 0) {
                ret.push_back(1);
                l++;
            } else {
                r = l+2;
                break;
            }
        } else {
            if (a[l] < 0 || l%2 == 1) {
                ret.push_back(1);
                l++;
            } else {
                r = l+2;
                break;
            }
        }
    }
    while (r < N-1) {
        if(a[r] < 0) {
            ret.push_back(3);
            r += 2;
        } else {
            ret.push_back(2);
            r += 2;
        }
    }
    if (r == N-1) {
        if (a[r] < 0) {
            ret.push_back(3);
            ret.push_back(2);
        } else {
            ret.push_back(2);
        }
    } else {
        ret.push_back(2);
    }
    if (odd) {
        std::cout << odd_v << std::endl;
    } else {
        std::cout << even_v << std::endl;
    }
    std::cout << ret.size() << std::endl;
    for (int i = 0; i < ret.size(); i++) {
        std::cout << ret[i] << std::endl;
    }
}

int main(){	
    struct timeval start,end;
    long long span;
    gettimeofday(&start,NULL);

    long long N;
    scanf("%lld",&N);
    vector<long long> a(N-1+1);
    for(int i = 0 ; i <= N-1 ; i++){
    	scanf("%lld",&a[i]);
    }
    solve(N, a);

    gettimeofday(&end,NULL);
    span = (end.tv_sec -start.tv_sec)*1000000LL + (end.tv_usec - start.tv_usec);
    std::cerr << "--Total Time: " << span/1000 << "ms" << endl;
    return 0;
}


Compiler output:
a.cc: In function 'void solve(long long int, std::vector<long long int>)':
a.cc:46:29: error: 'ret_num' was not declared in this scope
   46 |         for (int i = 0; i < ret_num; i++) {
      |                             ^~~~~~~
Language: C

#include <algorithm>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <map>
#include <math.h>
#include <set>
#include <stdio.h>
#include <string>
#include <utility>
#include <vector>

using namespace std;

vector<long long> f(vector<long long> &a, int id) {
  vector<long long> ret;
  if (id == 0) {
    for (int i = 1; i < a.size(); i++) {
      ret.push_back(a[i]);
    }
    return ret;
  }
  if (id == a.size() - 1) {
    for (int i = 0; i < a.size() - 1; i++) {
      ret.push_back(a[i]);
    }
    return ret;
  }
  for (int i = 0; i < id - 1; i++) {
    ret.push_back(a[i]);
  }
  ret.push_back(a[id - 1] + a[id + 1]);
  for (int i = id + 2; i < a.size(); i++) {
    ret.push_back(a[i]);
  }
  return ret;
}

int main() {
  int n;
  cin >> n;
  vector<long long> a(n);
  vector<int> ans;
  for (int i = 0; i < n; i++)
    cin >> a[i];
  while (a.size() > 1) {
    long long sum1 = 0, sum2 = 0;
    for (int i = 0; i < a.size(); i++) {
      if (i % 2 == 0) {
        if (a[i] > 0)
          sum1 += a[i];
      } else {
        if (a[i] > 0)
          sum2 += a[i];
      }
    }
    if (sum1 > sum2) {
      if (a[0] <= 0) {
        ans.push_back(1);
        a = f(a, 0);
        continue;
      }
      bool b = false;
      for (int i = 0; i < a.size() - 2; i += 2) {
        if (a[i] > 0 && a[i + 2] > 0) {
          ans.push_back(i + 2);
          a = f(a, i + 1);
          b = true;
          break;
        }
      }
      if (b) {
        continue;
      }
      if (a[a.size() - 1] <= 0 || a.size() % 2 == 0) {
        ans.push_back(a.size());
        a = f(a, a.size() - 1);
        continue;
      }
    } else {
      ans.push_back(1);
      a = f(a, 0);
    }
  }

  cout << a[0] << endl;
  cout << ans.size() << endl;
  for (int i = 0; i < ans.size(); i++)
    cout << ans[i] << endl;
  return 0;
}


Compiler output:
main.c:1:10: fatal error: algorithm: No such file or directory
    1 | #include <algorithm>
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
#include <climits>
#include <algorithm>
#include <vector>
#include <list>
using namespace std;
typedef long long LL;
const int MAXN = 1000 + 10;
int idx[2], nums[MAXN];
LL sum[2];
int main() {
//    freopen("test.txt", "r", stdin);
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int n; cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> nums[i];
        if (idx[i%2] == 0 || nums[idx[i%2]] < nums[i]) {
            idx[i%2] = i;
        }
        if (nums[i] > 0) {
            sum[i%2] += nums[i];
        }
    }
    if (nums[idx[0]] <= 0 && nums[idx[1]] <= 0) {
        if (nums[idx[0]] < nums[idx[1]]) {
            idx[0] = idx[1];
        }
        cout << nums[idx[0]] << '\n';
        cout << n-1 << '\n';
        for (int i = n; i > idx[0]; i--) {
            cout << i << '\n';
        }
        for (int i = 1; i < idx[0]; i++) {
            cout << "1\n";
        }
        return 0;
    }
    int p = 0, tot = 0;
    if (sum[1] > sum[0]) {
        p = 1;
    }
    vector<int> ret;
    list<bool> tmp;
    for (int i = 1; i <= n; i++) {
        if (i%2 != p || nums[i] < = 0) tmp.push_back(false);
        else tmp.push_back(true);
    }
    auto it = tmp.begin();
    while (it != tmp.end()) {
        if (*it) {
            tot++;
            it++;
            continue;
        }
        if (it == tmp.begin()) {
            ret.push_back(tot+1);
            tmp.erase(it++);
            continue;
        }
        auto it1 = it; it1--;
        auto it2 = it; it2++;
        if (it2 == tmp.end()) {
            ret.push_back(tot+1);
            tmp.erase(it++);
            continue;
        }
        if (*it1 == *it2) {
            ret.push_back(tot+1);
            tmp.erase(it++);
            tmp.erase(it++);
        }
    }
    cout << sum[p] << '\n';
    cout << ret.size() << '\n';
    for (int val : ret) {
        cout << val << '\n';
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:46:35: error: expected primary-expression before '=' token
   46 |         if (i%2 != p || nums[i] < = 0) tmp.push_back(false);
      |                                   ^
Language: C++

#include<bits/stdc++.h>
#define maxn 1005
#define ll long long
using namespace std;
ll dp[maxn],n,a[maxn],anss,l[maxn],r[maxn],id,ans[maxn],tail;
int main()
{
	scanf("%lld",&n);
	dp[0]=-0x3f3f3f3f;
	for(int i=1;i<=n;++i) scanf("%lld",&a[i]),dp[i]=a[i];
	for(int i=1;i<=n;++i) 
	for(int j=1;j<i;++j) 
	{
		if((i-j)%2==0)
		if(dp[j]+a[i]>dp[i]) dp[i]=max(dp[i],dp[j]+a[i]),l[i]=j;
	}
	for(int i=1;i<=n;++i) if(dp[i]>dp[id]) id=i;
	
	ll ans1=0;
	for(int i=1;i<=n;i+=2)
		if(a[i]>0) ans1+=a[i];
		
	ll ans2=0;
	for(int i=2;i<=n;i+=2)
		if(a[i]>0) ans2+=a[i];
	
	if(ans1==0 && ans2==0){
		ans1=-inf;
		for(int i=1;i<=n;i++)
			ans1=max(ans1,a[i]);
	}
	else ans1=max(ans1,ans2);
	cout<<ans1<<endl;

	for(int i=n;i>id;--i) ans[++tail]=i;
	while(l[id]!=0){
		int mid=(id+l[id])>>1;
		for(int i=mid;i>l[id];--i)
		ans[++tail]=i;
		id=l[id];
	}
	for(int i=1;i<id;++i) ans[++tail]=1;
	printf("%lld\n",tail);
	for(int i=1;i<=tail;++i) printf("%lld\n",ans[i]);
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:23: error: 'inf' was not declared in this scope; did you mean 'ynf'?
   28 |                 ans1=-inf;
      |                       ^~~
      |                       ynf