[백준][Java] 1662번 압축 (스택, 구현)

[백준][Java] 1662번 압축 (스택, 구현)

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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 Main { private static BufferedReader br = new BufferedReader( new InputStreamReader( System . in )); private static BufferedWriter bw = new BufferedWriter( new OutputStreamWriter( System . out )); public static void main( String [] args) throws IOException{ char [] arr = br.readLine().toCharArray(); Stack < Integer > unitSt = new Stack < > (); unitSt.push( 1 ); int res = 0 ; for ( int i = 0 ; i < arr. length ; i + + ) { if (arr[i] = = '(' ) { res - = unitSt.peek(); unitSt.push(unitSt.peek() * (arr[i - 1 ] - '0' )); } else if (arr[i] = = ')' ) { unitSt.pop(); } else { res + = unitSt.peek(); } } System . out . println (res); /*Stack unitSt = new Stack<>(); unitSt.push(1); char last = arr[arr.length-1]; int res = (arr.length>=2 && ('0'<=last && last<='9'))?2:1; for(int i=1; i

from http://aig2029.tistory.com/351 by ccl(A) rewrite - 2021-10-23 03:27:55