baekjoon 20251215-17

code_study/Baekjoon/java/_9527.java

@@ -0,0 +1,33 @@
+import java.util.*;
+
+public class _9527 {
+    static long[] power2 = new long[55];
+
+    static long getCountOne(long N) {
+        long ans = 0;
+
+        for(int i = 54; i>0; i--) {
+            long mark = (N & (1L << (i-1)));
+
+            if(mark != 0) {
+                ans += power2[i-1] + (N - mark + 1);
+                N -= mark;
+            }
+        }
+
+        return ans;
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        long A = sc.nextLong();
+        long B = sc.nextLong();
+        sc.close();
+
+        for(int i=1; i<55; i++) {
+            power2[i] = 2*power2[i-1] + (1L << (i-1));
+        }
+
+        System.out.println(getCountOne(B) - getCountOne(A-1));
+    }
+}

code_study/Baekjoon/python/20040.py

@@ -0,0 +1,36 @@
+import sys
+input = sys.stdin.readline
+
+n, m = map(int, input().split())
+parents = [i for i in range(n)]
+rank = [0]*n
+
+def find(x):
+    if parents[x] != x:
+        parents[x] = find(parents[x])
+    return parents[x]
+
+def union(x, y) :
+    x = find(x)
+    y = find(y)
+    
+    if x == y : return False 
+    
+    if rank[x] > rank[y] :
+        parents[y] = x
+    else :
+        parents[x] = y
+        if rank[x] == rank[y] :
+            rank[y] += 1
+    
+    return True
+
+ans = 0
+for i in range(m) :
+    a, b = map(int, input().split())
+    
+    if not union(a,b) :
+        ans = i+1
+        break
+
+print(ans)

code_study/Baekjoon/python/5337.py

@@ -0,0 +1,3 @@
+print(".  .   .")
+print("|  | _ | _. _ ._ _  _")
+print("|/\|(/.|(_.(_)[ | )(/.")

code_study/Baekjoon/python/9654.py

@@ -0,0 +1 @@
+print("SHIP NAME      CLASS          DEPLOYMENT IN SERVICE\nN2 Bomber      Heavy Fighter  Limited    21        \nJ-Type 327     Light Combat   Unlimited  1         \nNX Cruiser     Medium Fighter Limited    18        \nN1 Starfighter Medium Fighter Unlimited  25        \nRoyal Cruiser  Light Combat   Limited    4         ")