baekjoon 20260108

code_study/Baekjoon/java/_10844.java

@@ -0,0 +1,28 @@
+import java.util.Scanner;
+
+public class _10844 {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int N = sc.nextInt();
+        sc.close();
+
+        long MOD = 1000000000;
+        long[][] dp = new long[N+1][10];
+        for(int i=1; i<10; i++) dp[1][i] = 1;
+
+        for(int i=2; i<=N; i++) {
+            for(int j=0; j<10; j++) {
+                if(j==0) dp[i][j] = dp[i-1][1]%MOD;
+                else if(j==9) dp[i][j] = dp[i-1][8]%MOD;
+                else dp[i][j] = dp[i-1][j-1]%MOD + dp[i-1][j+1]%MOD;
+            }
+        }
+
+        long res = 0;
+        for (long n : dp[N]) {
+            res += n;
+            res %= MOD;
+        }
+        System.out.println(res);
+    }
+}

code_study/Baekjoon/java/_1562.java

@@ -0,0 +1,48 @@
+import java.util.*;
+
+public class _1562 {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int N = sc.nextInt();
+        sc.close();
+
+        if(N <= 10) {
+            System.out.println(N/10);
+            return;
+        }
+
+        long MOD = 1000000000;
+        long[][][] dp = new long[N+1][10][1024];
+        for(int i=1; i<10; i++) dp[1][i][1<<i] = 1;
+
+        
+        for(int length = 1; length < N; length++) {
+            for(int last_num = 0; last_num < 10; last_num++) {
+                for(int bit_state = 0; bit_state < 1024; bit_state++) {
+                    if(dp[length][last_num][bit_state] == 0) continue;
+
+                    int next_num = last_num + 1;
+                    if(0<=next_num && next_num<=9) {
+                        int next_bit_state = bit_state | (1<<next_num);
+                        dp[length+1][next_num][next_bit_state] += dp[length][last_num][bit_state];
+                        dp[length+1][next_num][next_bit_state] %= MOD;
+                    }
+
+                    next_num = last_num - 1;
+                    if(0<=next_num && next_num<=9) {
+                        int next_bit_state = bit_state | (1<<next_num);
+                        dp[length+1][next_num][next_bit_state] += dp[length][last_num][bit_state];
+                        dp[length+1][next_num][next_bit_state] %= MOD;
+                    }
+                }
+            }
+        }
+
+        long ans = 0;
+        for(int i=0; i<10; i++) {
+            ans += dp[N][i][1023];
+            ans %= MOD;
+        }
+        System.out.println(ans);
+    }
+}

code_study/Baekjoon/python/34945.py

@@ -0,0 +1 @@
+print("Success!" if int(input()) > 5 else "Oh My God!")