feat: 2025-10-28打卡

2025-10-28 15:52:13 +08:00
parent fc82d7eb10
commit 2fa03ec244
13 changed files with 486 additions and 6 deletions
--- a/367.valid-perfect-square.java
+++ b/367.valid-perfect-square.java
@@ -0,0 +1,25 @@
+/*
+ * @lc app=leetcode id=367 lang=java
+ *
+ * [367] Valid Perfect Square
+ */
+
+// @lc code=start
+class Solution {
+    public boolean isPerfectSquare(int num) {
+        long i = 0, j = num, m;
+        while(i <= j) {
+            m = i + (j-i)/2;
+            if(m * m == num) {
+                return true;
+            } else if(m * m <num) {
+                i = m + 1;
+            } else {
+                j = m - 1;
+            }
+        }
+        return false;
+    }
+}
+// @lc code=end
+