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import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Stack; import java.util.StringTokenizer; public class boj_17298 { static Stack s = new Stack(); static BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); static StringBuilder sb = new StringBuilder(); public static void main(String[] args) throws IOException { int ..