기초 알고리즘 io 추가 문항

io/Code_1924.java

@@ -1,11 +1,10 @@
 package io;
 
-
 import java.io.IOException;
 import java.util.Scanner;
 
 /*
- * �ۼ��� : 2018�� 07�� 20��
+ * �ۼ��� : 2018�� 07�� 23��
  * �� �� : 2007��
  * ������ 2007�� 1�� 1�� �������̴�. �׷��ٸ� 2007�� x�� y���� ���� �����ϱ�? �̸� �˾Ƴ��� ���α׷��� �ۼ�.
  * */
@@ -16,11 +15,54 @@ public static void main(String[] args) throws NumberFormatException, IOException
 
 		Scanner input = new Scanner(System.in);
 
-		int num = input.nextInt();
-
-		for(int i=1; i<10; ++i) {
-			System.out.println(num+" * "+i+" = "+num*i);
+		String[] s = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
+
+		String[] date = input.nextLine().split(" ");
+
+		int month = Integer.parseInt(date[0]);
+		int day = Integer.parseInt(date[1]);
+		int daySum = 0;
+
+		while(month-->1) {
+			if(month==2) {
+				daySum+=28;
+			}
+			else if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) {
+				daySum+=31;
+			}
+			else {
+				daySum+=30;
+			}
 		}
+		daySum += day;
+		daySum = daySum%7;
+		System.out.println(s[daySum]);
+
 	}
+	/* ��Ÿ�� ���� �߻�!
+	  public static void main(String[] args) throws NumberFormatException, IOException {
+      // TODO Auto-generated method stub
+
+      Scanner input = new Scanner(System.in);
+
+      String[] s = {"MON", "TUE", "WED", "THU", "FRI", "SAT", "SUN"};
+      int [] monthDay= {31,28,31,30,31,30,31,31,30,31,30,31};
+
+      String[] date = input.nextLine().split(" ");
+
+      int month = Integer.parseInt(date[0]);
+      int day = Integer.parseInt(date[1]);
+      int daySum = 0;
+
+      for(int i=0; i<month-1; ++i) {
+         daySum +=monthDay[i];
+      }
+
+      daySum = (daySum+day)%7;
+
+      System.out.println(s[daySum-1]);
+
+   }
 
+	 */
 }

io/Code_2438.java

@@ -3,7 +3,7 @@
 import java.util.Scanner;
 
 /*
- * �ۼ��� : 2018�� 07�� 20��
+ * �ۼ��� : 2018�� 07�� 23��
  * �� �� : ����� - 1
  * 		ù° �ٺ��� N��° �� ���� ���ʴ�� ���� ���.
  */
@@ -16,6 +16,15 @@ public static void main(String[] args) {
 
 		int num = sc.nextInt();
 
+		StringBuilder sb = new StringBuilder();
 
+
+		for(int i=1; i<=num; ++i) {
+			sb.append("*");
+		}
+
+		for(int i=1; i<=num; ++i) {
+			System.out.println(sb.substring(0, i));
+		}
 	}
 }

io/Code_2439.java

@@ -0,0 +1,31 @@
+package io;
+
+import java.util.Scanner;
+
+/*
+ * �ۼ��� : 2018�� 07�� 23��
+ * �� �� : ����� - 2
+ * 		ù° �ٿ��� �� 1��, ��° �ٿ��� �� 2��, N��° �ٿ��� �� N���� ��� ����(�������� ��������)
+ */
+public class Code_2439 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		Scanner sc = new Scanner(System.in);
+
+		int num = sc.nextInt();
+
+		StringBuilder sb = new StringBuilder();
+		StringBuilder sb2 = new StringBuilder();
+
+		for(int i=1; i<=num; ++i) {
+			sb.append("*");
+			sb2.append(" ");
+		}
+
+		for(int i=1; i<=num; ++i) {
+			System.out.println(sb2.substring(0, num-i)+sb.substring(0, i));
+		}
+	}
+}

io/Code_2440.java

@@ -0,0 +1,29 @@
+package io;
+
+import java.util.Scanner;
+
+/*
+ * �ۼ��� : 2018�� 07�� 23��
+ * �� �� : ����� - 3
+ * 		ù° �ٿ��� �� N��, ��° �ٿ��� �� N-1��, ..., N��° �ٿ��� �� 1���� ��� ����
+ */
+public class Code_2440 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		Scanner sc = new Scanner(System.in);
+
+		int num = sc.nextInt();
+
+		StringBuilder sb = new StringBuilder();
+
+		for(int i=1; i<=num; ++i) {
+			sb.append("*");
+		}
+
+		for(int i=num; i>=1; --i) {
+			System.out.println(sb.substring(0, i));
+		}
+	}
+}

io/Code_2441.java

@@ -0,0 +1,31 @@
+package io;
+
+import java.util.Scanner;
+
+/*
+ * �ۼ��� : 2018�� 07�� 23��
+ * �� �� : ����� - 4
+ * 		ù° �ٿ��� �� N��, ��° �ٿ��� �� N-1��, ..., N��° �ٿ��� �� 1���� ��� ����(�������� �������� ����)
+ */
+public class Code_2441 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		Scanner sc = new Scanner(System.in);
+
+		int num = sc.nextInt();
+
+		StringBuilder sb = new StringBuilder();
+		StringBuilder sb2 = new StringBuilder();
+
+		for(int i=1; i<=num; ++i) {
+			sb.append("*");
+			sb2.append(" ");
+		}
+
+		for(int i=num; i>=1; --i) {
+			System.out.println(sb2.substring(0, num-i)+sb.substring(0, i));
+		}
+	}
+}