diff --git a/3.c b/3.c
new file mode 100644
index 0000000..194b5e2
--- /dev/null
+++ b/3.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctime>
+#include <iostream>
+#include <ostream>
+#include <arm_neon.h>
+int main(){
+	void applySeparableGaussianBlur(float src[][100],float dst[][100],int h,int w,float kx[3],float ky[3]);
+	int i,j;
+	float inputImage[5][100]={
+	{1,2,3,4,5},
+	{6,7,8,9,10},
+	{11,12,13,14,15},
+	{16,17,18,19,20},
+	{21,22,23,24,25}
+	};
+	float outputImage[5][100];
+	float kx[3]={0.25,0.5,0.25};
+	float ky[3]={0.25,0.5,0.25};
+	clock_t start=clock();
+	applySeparableGaussianBlur(inputImage,outputImage,5,5,kx,ky);
+	clock_t end=clock();
+	std::cout<<"²½Öè3ÔËËãʱ¼ä£º"<<double(end-start)/CLOCKS_PER_SEC<<"Ãë"<<std::endl;
+	for(i=1;i<5-1;i++){
+		for(j=1;j<5-1;j++){
+			printf("%5.2f ",outputImage[i][j]);
+		}
+		printf("\n");
+	}
+}
+void applySeparableGaussianBlur(float src[][100],float dst[][100],int h,int w,float kx[3],float ky[3]){
+	#define IDX(n) ((n)%3)
+	float buf[3][3]={0};
+	int i,j;
+	float32x4_t kx_vec=vld1q_f32(kx);
+	float32x4_t ky_vec=vld1q_f32(ky);
+	for(i=0;i<2;i++){
+		for(j=1;j<w-1;j++){
+			buf[i][j]=src[i][j-1]*kx[0]+src[i][j]*kx[1]+src[i][j+1]*kx[2];
+		}
+	}
+	for(i=1;i<h-1;i++){
+		for(j=1;j<w-1;j+=4){
+			float32x4_t left=vld1q_f32(&src[i+1][j-1]);
+			float32x4_t mid=vld1q_f32(&src[i+1][j]);
+			float32x4_t right=vld1q_f32(&src[i+1][j+1]);
+			float32x4_t result=vmulq_lane_f32(left,vget_low_f32(kx_vec),0);
+			result=vmlaq_lane_f32(result,mid,vget_low_f32(kx_vec),1);
+			result=vmlaq_lane_f32(result,right,vget_high_f32(kx_vec),0);
+			vst1q_f32(&buf[IDX(i+1)][j],result);
+		}
+		for(j=1;j<w-1;j++){
+			dst[i][j]=buf[IDX(i-1)][j]*ky[0]+buf[IDX(i)][j]*ky[1]+buf[IDX(i+1)][j]*ky[2];
+		}
+	}
+}