// Slower C++ solution:
#include<bits/stdc++.h>

#define SZ(x) ((int)x.size())

#define uni(x) sort(all(x)),x.resize(unique(all(x))-x.begin());

#define GETPOS(c,x) (lower_bound(all(c),x)-c.begin())

#define lown1(x,val) low(in(x),val)-x

#define mst(x,val) memset((x),val,sizeof((x)));

#define ls rt<<1

#define rs rt<<1|1

#define lson rt<<1,l,M

#define rson rt<<1|1,M+1,r

#define PI acos(-1)

#define MM int M=(l+r)>>1;

#define fu(i,r,t) for(int i=r;i<=t;i++)

#define fd(i,r,t) for(int i=r;i>=t;i--)

#define fh(i,be,e) for(int i=head[be];~i;i=e[i].next)

#define fa(i,V) for(auto i:V)

#define far(i,V) for(auto &i:V)

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

#define lcm(a,b) (a*b)/__gcd(a,b)

#define cp(i,ans) printf("%.if",ans);

#define cpp(i,ans) cout<<setprecision(i)<<fixed<<ans<<endl;

#define ppb pop_back

#define ppf pop_front

#define pb push_back

#define pf push_front

#define pq priority_queue

#define lowbit(x) (x)&(-x)

#define all(V) V.begin(),V.end()

#define ms multiset

#define mod(x) ((x+mo_num)%mo_num)

#define vc vector

#define vct vector<int>

#define out(i) cout<<(i)<<endl;

#define fi first

#define se second

#define fun(i) fu(i,1,n)

#define fut(i) fu(i,1,t)

#define fum(i) fu(i,1,m)

#define ld long double

#define umap unordered_map

#define P pair<int,int>

#define SET set<int>

#define mp map<int,int>

#define mk make_tuple

//Remember cancel"#define endl '\n'" in interactive questions or use "<<flush"

#define endl '\n'

#define low lower_bound

#define upp upper_bound

#define yn(key) out(key?"YES":"NO")

//#define yn(key) out(key?"Yes":"No")

#define in(i) i+1,i+1+n

#define im(i) i+1,i+1+m

#define bffs(i) __builtin_ffs(i)

#define bcount(i) __builtin_popcount(i)

#define bone(i) ((1<<i)-1)

#define db double

#define got(container,num) get<num-1>(container)

#define int long long

using namespace std;

//Remember to cancel the line below and declare INT=INT_MAX/2; when you want to change long to int

const int INF=LLONG_MAX/2,SINF=0x3f3f3f3f,Lim=1<<20,MINF=LLONG_MAX;

//const int INT=INT_MAX/2;

// use C:printf("%.16f", x);  ->  printf("%.10f", x); can accelerate the program

typedef unsigned long long ull; template<class T> void _R(T &x) { cin >> x; }void _R(int32_t &x) { scanf("%d", &x); }void _R(long long &x) { scanf("%lld", &x); }void _R(ull &x) { scanf("%llu", &x); }void _R(double &x) { scanf("%lf", &x); }void _R(char &x) { scanf(" %c", &x); }void _R(char *x) { scanf("%s", x); }void R() {}template<class T, class... U> void R(T &head, U &... tail) { _R(head); R(tail...); }template<class T> void _W(const T &x) { cout << x; }void _W(const int32_t &x) { printf("%d", x); }void _W(const long long &x) { printf("%lld", x); }void _W(const double &x) { printf("%.16f", x); }void _W(const char &x) { putchar(x); }void _W(const char *x) { printf("%s", x); }template<class T,class U> void _W(const pair<T,U> &x) {_W(x.F); putchar(' '); _W(x.S);}template<class T> void _W(const vector<T> &x) { for (auto i = x.begin(); i != x.end(); _W(*i++)) if (i != x.cbegin()) putchar(' '); }void W() {}template<class T, class... U> void W(const T &head, const U &... tail) { _W(head); putchar(sizeof...(tail) ? ' ' : '\n'); W(tail...); }

const int dx[]={0,0,-1,1},dy[]={-1,1,0,0};//up down left right

const int maxn=1e6+1e5;

const int mo_num=1e9+7;

//const int mo_num=998244353;

int n,m,t,a[maxn],b[maxn],ans;

string k;



void solve()

{

    cin>>n;

    fun(i) {

        cin >> a[i];

        ans+=a[i];

        a[i]*=2;

        if(i%2==0)b[1]+=a[i];

    }

    b[1]=ans-b[1];

    cout<<b[1]<<" ";

    fun(i)

    {

        if(i==n)break;

        cout<<a[i]-b[i]<<" ";

        b[i+1]=a[i]-b[i];

    }

    return ;

}

main()

{

    IOS

    int T=1;

    //cin>>T;

    while(T--)solve();

    return 0;

}


// Faster C++ solution for the same problem (measured speedup: 5.284979375328194x):
#include <cstdio>

#include <algorithm>

#include <cstring>

#define ll long long

using namespace std;

int a[100005],ans[100005];

int main(){

	int n,i;

	int tmp;

	scanf("%d",&n);

	for(i=0;i<n;i++){

        scanf("%d",&a[i]);

	}

	for(i=0,tmp=a[0];i<n;i++){

        tmp=a[i]-tmp;

	}

	tmp=tmp+a[0];

	tmp=tmp/2;

	for(i=0;i<n;i++){

	    printf("%d ",tmp*2);

        tmp=a[i]-tmp;



	}

    return 0;

}