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Q1874.java
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Q1874.java
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package forRank;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Stack;
public class Q1874 {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
int n = Integer.parseInt(br.readLine());
Stack<Integer> stack = new Stack<Integer>();
StringBuilder sb = new StringBuilder();
boolean isNotPossible = false;
int cnt = 0;
for (int i = 0; i < n; i++) {
if(!isNotPossible){
int cur = Integer.parseInt(br.readLine());
while(stack.isEmpty() || stack.peek() != cur){
stack.push(++cnt);
sb.append("+\n");
if(cnt > n){
isNotPossible = true;
break;
}
}
stack.pop();
sb.append("-\n");
}
}
if(isNotPossible){
bw.write("NO\n");
} else
bw.write(sb.toString());
br.close();
bw.close();
}
}