import java.util.*
 
fun main(args: Array<String>) {
    val sc = Scanner(System.`in`)
    val n = sc.nextInt()
 
	val numSequence = mutableListOf<Int>()
    repeat(n) {
    	numSequence.add(sc.nextInt())
    }
 
    val sb = StringBuilder()
    val stack = Stack<Int>()
    var index = 0
    var current = 1
    while (true) {
        if (stack.isNotEmpty() && stack.peek() == numSequence[index]) {
            sb.append("-\n")
            stack.pop()
            index++
        } else if (current <= n) {
            sb.append("+\n")
            stack.push(current)
            current++
        } else {
            break
        }
    }
 
    if (stack.isNotEmpty()) {
        println("NO")
    } else {
        println(sb)
    }  
}

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8
4
3
6
8
7
5
2
1