BackJoon Algorithm - Java
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문제
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풀이
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Stack;
import java.util.StringTokenizer;
public class Back_17298 {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine());
StringTokenizer st = new StringTokenizer(br.readLine());
StringBuilder sb = new StringBuilder();
Stack<Integer> stack = new Stack<>();
int value[] = new int[N];
for (int i = 0; i < N; i++) {
value[i] = Integer.parseInt(st.nextToken());
}
for (int i = 0; i < N; i++) {
while(!stack.isEmpty() && value[stack.peek()] < value[i]){
value[stack.pop()] = value[i];
}
stack.push(i);
}
while(!stack.empty()){
value[stack.pop()] = -1;
}
for(int i = 0; i<N;i++){
sb.append(value[i]).append(" ");
}
System.out.println(sb);
}
}
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