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AstonishingString.java
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AstonishingString.java
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package Baekjoon.DataStructure;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;
// 24-10-12 15min
// https://www.acmicpc.net/problem/1972
public class AstonishingString {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringBuilder sb = new StringBuilder();
String str;
while ((str = br.readLine()).charAt(0) != '*') {
int length = str.length();
boolean isAstonishing = true;
for (int i = 1; i < length - 1; i++) {
Set<String> set = new HashSet<>();
for (int j = 0; j < length; j++) {
if (i + j >= length) {
break;
}
char first = str.charAt(j);
char second = str.charAt(j + i);
String s = String.valueOf(new char[] {first, second});
if (set.contains(s)) {
isAstonishing = false;
break;
}
set.add(s);
}
if (!isAstonishing) {
break;
}
}
sb.append(str).append(" is ").append(isAstonishing ? "surprising.\n" : "NOT surprising.\n");
}
System.out.println(sb);
}
}