package main

import . "fmt"
import . "math/big"

func main() {
	var n int
	Scan(&n)
	f:=new(Int)
	Scan(f)
	Print(f)
	for i:=1;i<n;i++ {
		g:=new(Int)
		Scan(g)
		f.Mul(f,NewInt(-1)).Add(f,g)
		Print(" ")
		Print(f)
	}
	Println()
}