import std.stdio, std.conv, std.string, std.array, std.range, std.algorithm, std.container;
import std.math, std.random, std.bigint, std.datetime, std.format;
void main(string[] args){ if(args.length > 1) if(args[1] == "-debug") DEBUG = 1; solve(); }
void log()(){ writeln(""); } void log(T, A ...)(T t, lazy A a){ if(DEBUG) write(t, " "), log(a); } bool DEBUG = 0; 
string read(){ static string[] ss; while(!ss.length) ss = readln.chomp.split; string res = ss[0]; ss.popFront; return res; }
// ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- //
void solve(){
	int n = read.to!int;
	long[] as;
	foreach(i; 0 .. n) as ~= read.to!long;
	
	long[] ans = new long[](n);
	foreach(i; 0 .. n){
		if(i == 0) ans[i] = 0;
		else ans[i] = as[i - 1] * 2 - ans[i - 1];
	}
	log("temp:", ans);
	
	long b = as[n - 1] - ans[n - 1] / 2; // 整数になるはず
	log("b:", b);
	
	foreach(i; 0 .. n){
		if(i % 2) ans[i] -= b;
		else ans[i] += b;
	}
	log("ans:", ans);
	
	ans.map!(to!string).join(" ").writeln;
	
	
}
