백준 11931번 (Silver 5)
import java.io.*;
import java.util.Arrays;
import java.util.Collections;
import java.util.StringTokenizer;
public class problem300 {
public static void main(String[] args) throws IOException {
// Scanner 입력과, println을 사용하면 시간초과로 인해 버퍼와, writer사용
BufferedReader br
= new BufferedReader(new InputStreamReader(System.in));
BufferedWriter writer
= new BufferedWriter(new OutputStreamWriter(System.out));
StringTokenizer st = new StringTokenizer(br.readLine());
int N = Integer.parseInt(st.nextToken());
Integer arr[] = new Integer[N];
for (int i = 0; i < N; i++) {
arr[i] = Integer.parseInt(br.readLine());
}
Arrays.sort(arr, Collections.reverseOrder());
// 내림차순으로 출력
for (Integer i : arr) {
writer.write(i + "\n");
}
writer.flush();
}
}
백준 13909번 (Silver 5)
import java.util.Scanner;
public class problem301 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int t = in.nextInt();
// 소인수 분해 하였을떄 n * n의 값들이 남는다.(1, 4, 9, 16 ..)
// 제곱근
System.out.print((int) Math.floor(Math.sqrt(t)));
}
}
백준 14490번 (Silver 5)
import java.util.Scanner;
public class problem302 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String[] str = in.next().split(":");
int a = Integer.parseInt(str[0]);
int b = Integer.parseInt(str[1]);
int temp = gcd(a, b);
System.out.println(a / temp + ":" + b / temp);
}
// 최대 공약수
private static int gcd(int a, int b) {
if (b == 0) return a;
return gcd(b, a % b);
}
}
백준 14582번 (Silver 5)
import java.util.Scanner;
public class problem303 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int[] arr = new int[9];
int[] brr = new int[9];
int aSum = 0;
int bSum = 0;
boolean flag = false;
for (int i = 0; i < 9; i++) {
arr[i] = in.nextInt();
}
for (int i = 0; i < 9; i++) {
brr[i] = in.nextInt();
}
for (int i = 0; i < 9; i++) {
aSum += arr[i];
// 이기고 있는지 확인
if (aSum > bSum) {
flag = true;
}
bSum += brr[i];
// 역전이 당했는지 확인
if (aSum > bSum) {
flag = true;
}
}
if (aSum < bSum && flag) {
System.out.print("Yes");
} else {
System.out.print("No");
}
}
}