diff --git a/HDOJ/5875_chen9510.cpp b/HDOJ/5875_chen9510.cpp
new file mode 100644
index 0000000..780de3d
--- /dev/null
+++ b/HDOJ/5875_chen9510.cpp
@@ -0,0 +1,48 @@
+// From http://www.cnblogs.com/chen9510/p/5862834.html
+// ONLY For Test
+#include <iostream>
+#include <algorithm>
+#include <cstdio>
+#include <cstring>
+#include <set>
+using namespace std;
+int A[100005];
+int pos[100005];
+int s[100005];
+
+int main()
+{
+    int T,N,M;
+    cin>>T;
+    while(T--)
+    {
+        scanf("%d",&N);
+        for(int i=1;i<=N;i++)
+            scanf("%d",&A[i]);
+        int num=1;
+        A[N+1]=-1;
+        s[1]=N+1;
+        for(int i=N;i>=1;i--)///单调栈；
+        {
+            while(A[i]<A[s[num]]) num--;
+            pos[i]=s[num];
+            s[++num]=i;
+        }
+        scanf("%d",&M);
+        while(M--)
+        {
+            int l,r;
+            scanf("%d%d",&l,&r);
+            int tmp=A[l];
+            while(l<=r)
+            {
+                if(tmp==0) break;
+                if(pos[l]>r) break;
+                tmp=tmp%A[pos[l]];
+                l=pos[l];
+            }
+            printf("%d\n",tmp);
+        }
+    }
+    return 0;
+}