Photoshoot

문제

Farmer John is lining up his $NN$ cows ($2\le N\le {10}^{3}2\backslash le\; N\backslash le\; 10^3$), numbered $1\dots N1\backslash ldots\; N$, for a photoshoot. FJ initially planned for the $ii$-th cow from the left to be the cow numbered $a_i,a\_i,$ and wrote down the permutation $a_1,a_2,\dots ,a_{N}a\_1,a\_2,\backslash ldots,a\_N$ on a sheet of paper. Unfortunately, that paper was recently stolen by Farmer Nhoj!

Luckily, it might still possible for FJ to recover the permutation that he originally wrote down. Before the sheet was stolen, Bessie recorded the sequence $b_1,b_2,\dots ,b_{N-1}b\_1,b\_2,\backslash ldots,b\_\{N-1\}$ that satisfies $b_i=a_i+a_{i+1}b\_i=a\_i+a\_\{i+1\}$ for each

Based on Bessie's information, help FJ restore the "lexicographically minimum" permutation $aa$ that could have produced $bb$. A permutation $xx$ is lexicographically smaller than a permutation $yy$ if for some $jj$, $x_i=y_{i}x\_i=y\_i$ for all and (in other words, the two permutations are identical up to a certain point, at which $xx$ is smaller than $yy$). It is guaranteed that at least one such $aa$ exists.

입력

The first line of input contains a single integer $N\mathrm{.}N.$

The second line contains $N-1N-1$ space-separated integers $b_1,b_2,\dots ,b_{N-1}\mathrm{.}b\_1,b\_2,\backslash ldots,b\_\{N-1\}.$

출력

A single line with $NN$ space-separated integers $a_1,a_2,\dots ,a_N\mathrm{.}a\_1,a\_2,\backslash ldots,a\_\{N\}.$

힌트

$aa$ produces $bb$ because $3+1=43+1=4$, $1+5=61+5=6$, $5+2=75+2=7$, and $2+4=6.2+4=6.$

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