diff --git a/3.cpp b/3.cpp
new file mode 100644
index 0000000..76c08c4
--- /dev/null
+++ b/3.cpp
@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <math.h>
+#include <time.h>
+#include <arm_neon.h>
+
+void applySeparableGaussianBlur(float src[5][5], float dst[5][5], int h, int w, float kx[3], float ky[3]) {
+    float buf[5][5] = {0};
+	
+	// 将卷积核加载到 Neon 寄存器 
+	float32x4_t kx_vec = vld1q_f32(kx); // 加载 kx 
+    float32x4_t ky_vec = vld1q_f32(ky); // 加载 ky 
+	
+	// 水平卷积 
+    for (int i = 1; i < h - 1; i++) {
+        for (int j = 1; j < w - 1; j += 4) {
+            float32x4_t left = vld1q_f32(&src[i][j-1]);
+            float32x4_t mid = vld1q_f32(&src[i][j]);
+            float32x4_t right = vld1q_f32(&src[i][j+1]);
+
+            float32x4_t result = vmulq_lane_f32(left, vget_low_f32(kx_vec), 0);  // kx[0] * left
+			result = vmlaq_lane_f32(result, mid, vget_low_f32(kx_vec), 1);       // + kx[1] * mid
+			result = vmlaq_lane_f32(result, right, vget_high_f32(kx_vec), 0);    // + kx[2] * right
+        	
+			vst1q_f32(&buf[i][j], result);
+		}
+    }
+    
+    // 垂直卷积
+    for (int i = 1; i < h - 1; i++) {
+        for (int j = 1; j < w - 1; j++) {
+            // 加载垂直方向上的 3 个点
+            float top = buf[i - 1][j];
+            float mid = buf[i][j];
+            float bottom = buf[i + 1][j];
+
+            // 垂直方向卷积
+            float result = ky[0] * top + ky[1] * mid + ky[2] * bottom;
+
+            dst[i][j] = result; // 存储到 dst 矩阵
+        }
+    }
+}
+
+int main() {
+    float src[5][5] = {
+        {0, 0, 0, 0, 0},
+        {0, 1, 2, 3, 0},
+        {0, 4, 5, 6, 0},
+        {0, 7, 8, 9, 0},
+        {0, 0, 0, 0, 0}
+    };
+    float dst[5][5] = {0};
+    float kx[3] = {0.25, 0.5, 0.25};
+    float ky[3] = {0.25, 0.5, 0.25};
+	
+
+    clock_t start = clock();
+    applySeparableGaussianBlur(src, dst, 5, 5, kx, ky);
+    clock_t end = clock();
+
+    printf("矩阵结果：\n");
+    for (int i = 0; i < 5; i++) {
+        for (int j = 0; j < 5; j++) {
+            printf("%.2f ", dst[i][j]);
+        }
+        printf("\n");
+    }
+    printf("步骤3运行时间：%f秒\n", (double)(end - start) / CLOCKS_PER_SEC);
+
+    return 0;
+}