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BOJ_7585.java
35 lines (31 loc) · 1.13 KB
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BOJ_7585.java
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Stack;
public class Main {
private boolean isLegalBrackets(String s) {
Stack<Character> stk = new Stack<>();
for (int i = 0; i < s.length(); i++) {
switch (s.charAt(i)) {
case '(' : case '[' : case '{' : stk.push(s.charAt(i)); break;
case ')' : if (stk.pop() != '(') return false; break;
case ']' : if (stk.pop() != '[') return false; break;
case '}' : if (stk.pop() != '{') return false; break;
}
}
if (stk.isEmpty()) return true;
return false;
}
private void solution() throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringBuilder sb = new StringBuilder();
while (true) {
String s = br.readLine();
if (s.equals("#")) break;
sb.append(isLegalBrackets(s) ? "Legal\n" : "Illegal\n");
}
System.out.print(sb);
}
public static void main(String[] args) throws Exception {
new Main().solution();
}
}