2024/11/1 灵茶题单 滑动窗口 恰好型滑动窗口

src/main/java/com/cool/ling_cha_mount/sliding_windows/Num930.java

@@ -0,0 +1,30 @@
+package com.cool.ling_cha_mount.sliding_windows;
+
+/**
+ * Created with IntelliJ IDEA.
+ *
+ * @Author: Cool
+ * @Date: 2024/11/01/23:33
+ * @Description: 930. 和相同的二元子数组
+ */
+public class Num930 {
+    public int numSubarraysWithSum(int[] nums, int goal) {
+        int res = 0;
+        int left1 = 0;
+        int left2 = 0;
+        int sum1 = 0;
+        int sum2 = 0;
+        for (int i = 0; i < nums.length; i++) {
+            sum1 += nums[i];
+            sum2 += nums[i];
+            while (left1 <= i && sum1 > goal) {
+                sum1 -= nums[left1++];
+            }
+            while (left2 <= i && sum2 >= goal) {
+                sum2 -= nums[left2++];
+            }
+            res += left2 - left1;
+        }
+        return res;
+    }
+}