diff --git a/HDOJ/3527.cpp b/HDOJ/3527.cpp
new file mode 100644
index 0000000..5f99c5e
--- /dev/null
+++ b/HDOJ/3527.cpp
@@ -0,0 +1,46 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    int a, b, c;
+    string name;
+    while (cin >> a >> b >> c)
+    {
+        set<string> s;
+        vector<string> v;
+        for (int i=0; i<a; i++)
+        {
+            cin >> name;
+            s.insert(name);
+        }
+        for (int j=0; j<b; j++)
+        {
+            cin >> name;
+            if (s.count(name)) v.push_back(name);
+        }
+        for (int k=0; k<c; k++)
+        {
+            cin >> name;
+            for (int i=0; i<v.size(); i++)
+            {
+                if (v[i] == name)
+                {
+                    v.erase(v.begin()+i);
+                }
+            }
+        }
+        if (v.empty()) cout << "No enemy spy\n";
+        else
+        {
+            int sz = v.size();
+            cout << v[0];
+            for (int i=1; i<sz; i++)
+                cout << " " << v[i];
+            cout << "\n";
+        }
+    }
+    return 0;
+}
diff --git a/QUSTOJ/1282.cpp b/QUSTOJ/1282.cpp
new file mode 100644
index 0000000..caa403a
--- /dev/null
+++ b/QUSTOJ/1282.cpp
@@ -0,0 +1,39 @@
+#include <cstring>
+#include <cstdio>
+#include <cstdlib>
+int c[26];
+char buff[1024];
+int main()
+{
+    int n;
+    while(scanf("%d%*c",&n)==1)
+    {
+        gets(buff);
+        memset(c,0,sizeof(int)*26);
+        for(int i=0;i<n;i++)
+        {
+            if(buff[i]>='A'&&buff[i]<='Z')
+            {
+                ++c[buff[i]-'A'];
+            }
+            else
+            {
+                ++c[buff[i]-'a'];
+            }
+        }
+        bool flag=true;
+        for(int i=0;i<26;i++)
+        {
+            if(c[i]<1) flag=false;
+        }
+        if(!flag)
+        {
+            printf("NO\n");
+        }
+        else
+        {
+            printf("YES\n");
+        }
+    }
+    return 0;
+}
diff --git a/QUSTOJ/1358.cpp b/QUSTOJ/1358.cpp
new file mode 100644
index 0000000..dfebdf5
--- /dev/null
+++ b/QUSTOJ/1358.cpp
@@ -0,0 +1,21 @@
+#include <cstdio>
+#include <cstring>
+#include <cstdlib>
+using namespace std;
+
+char buff[1024];
+
+int main()
+{
+    gets(buff);
+    int l=strlen(buff);
+    for(int i=0;i<l;i++)
+    {
+        if(buff[i]=='a'||buff[i]=='e'||buff[i]=='i'||buff[i]=='o'||buff[i]=='u')
+        {
+            printf("%c",buff[i]);
+        }
+    }
+    printf("\n");
+    return 0;
+}
diff --git a/QUSTOJ/1359.c b/QUSTOJ/1359.c
new file mode 100644
index 0000000..6971d39
--- /dev/null
+++ b/QUSTOJ/1359.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+int main()
+{
+    int inc;
+    scanf("%d",&inc);
+    printf("%d %d %d %d \n",inc/1000,(inc%1000)/100,(inc%100)/10,inc%10);
+    return 0;
+}
diff --git a/QUSTOJ/1360.cpp b/QUSTOJ/1360.cpp
new file mode 100644
index 0000000..83a8fdb
--- /dev/null
+++ b/QUSTOJ/1360.cpp
@@ -0,0 +1,33 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+using namespace std;
+
+int a,b,c,d;
+char buff[2048];
+int main()
+{
+    gets(buff);
+    int L=strlen(buff);
+    for(int i=0;i<L;i++)
+    {
+        if((buff[i]>='a'&&buff[i]<='z')||(buff[i]>='A'&&buff[i]<='Z'))
+        {
+            a++;
+        }
+        else if(buff[i]>='0'&&buff[i]<='9')
+        {
+            b++;
+        }
+        else if(buff[i]==' ')
+        {
+            c++;
+        }
+        else
+        {
+            d++;
+        }
+    }
+    printf("%d %d %d %d \n",a,b,c,d);
+    return 0;
+}
diff --git a/QUSTOJ/1362.c b/QUSTOJ/1362.c
new file mode 100644
index 0000000..91df013
--- /dev/null
+++ b/QUSTOJ/1362.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+int main()
+{
+    int a,b;
+    scanf("%d %d",&a,&b);
+    printf("%d\n",a%b);
+    return 0;
+}
diff --git a/QUSTOJ/1363.c b/QUSTOJ/1363.c
new file mode 100644
index 0000000..6c70fe9
--- /dev/null
+++ b/QUSTOJ/1363.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <math.h>
+/*This program does not use #define to solve the problem*/
+int main()
+{
+    double a,b,c,p;
+    scanf("%lf %lf %lf",&a,&b,&c);
+    p=(a+b+c)/2;
+    printf("%.3lf\n",sqrt(p*(p-a)*(p-b)*(p-c)));
+    return 0;
+}
diff --git a/QUSTOJ/1600.cpp b/QUSTOJ/1600.cpp
new file mode 100644
index 0000000..9c8a6bd
--- /dev/null
+++ b/QUSTOJ/1600.cpp
@@ -0,0 +1,37 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main() {
+ios::sync_with_stdio(false); cin.tie(0);
+int a, b, c;
+string name;
+while (cin >> a >> b >> c) {
+set<string> s;
+vector<string> v;
+for (int i=0; i<a; i++) {
+cin >> name;
+s.insert(name);
+}
+for (int j=0; j<b; j++) {
+cin >> name;
+if (s.count(name)) v.push_back(name);
+}
+for (int k=0; k<c; k++) {
+cin >> name;
+for (int i=0; i<v.size(); i++) {
+if (v[i] == name) {
+v.erase(v.begin()+i);
+}
+}
+}
+if (v.empty()) cout << "No enemy spy\n";
+else {
+int sz = v.size();
+cout << v[0];
+for (int i=1; i<sz; i++)
+cout << " " << v[i];
+cout << "\n";
+}
+}
+return 0;
+}
diff --git a/QUSTOJ/1631.c b/QUSTOJ/1631.c
new file mode 100644
index 0000000..5140094
--- /dev/null
+++ b/QUSTOJ/1631.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char save[] = "`1234567890-=QWERTYUIOP[]\\ASDFGHJKL;\'ZXCVBNM,./";
+char maps[512];
+char data[512];
+
+int main()
+{
+	for ( int i = 1 ; save[i] ; ++ i )
+		maps[save[i]] = save[i-1];
+	
+	while ( gets(data) ) {
+		for ( int i = 0 ; data[i] ; ++ i )
+			if ( data[i] == ' ' || data[i] == '	' )
+				printf("%c",data[i]);
+			else printf("%c",maps[data[i]]);
+		printf("\n");	
+	}
+	return 0;
+}