diff --git a/QUSTOJ/1003.cpp b/QUSTOJ/1003.cpp
new file mode 100644
index 0000000..b6d55fc
--- /dev/null
+++ b/QUSTOJ/1003.cpp
@@ -0,0 +1,41 @@
+#include<iostream>
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+ 
+int s, t, m, tot = 0, ans = 0;
+long long l;
+int vis[11000] = {0};
+int sto[110] = {0};
+int f[11000] = {0};
+ 
+int main ()
+{
+    //freopen ("in.txt", "r", stdin);
+    cin >> l >> s >> t >> m;
+    for (int i = 0; i < m; i++) cin >> sto[i];
+    sort (sto, sto + m);
+    if (s == t) {
+        for (int i = 0; i < m; i++) {
+            if (!(sto[i]%s)) ans++;
+        }
+        cout << ans;
+        return 0;
+    }
+    int e;
+    if (sto[0] > 100) vis[tot = 100] = 1;
+    else vis[tot = sto[0]] = 1; 
+    for (int i = 1; i < m; i++) {
+        if ((e = sto[i] - sto[i-1]) > 100) { vis[tot += 100] = 1;}
+        else { vis[tot += e] = 1;}
+    }
+ 
+    for (int i = tot; i >= 0; i--) {
+        f[i] = 200;
+        for (int j = s; j <= t; j++) {
+            f[i] = min (f[i], f[i+j] + vis[i]);
+        }
+    }
+    cout << f[0];
+    return 0;
+ }
diff --git a/QUSTOJ/1443.cpp b/QUSTOJ/1443.cpp
new file mode 100644
index 0000000..c7c14bb
--- /dev/null
+++ b/QUSTOJ/1443.cpp
@@ -0,0 +1,44 @@
+#include<iostream>
+using namespace std;
+int m,n;
+int solve()
+{
+    int a,b,mx=0;
+    int i,j;
+    int v[61]={0},p[61]={0},q;
+    int v1[61]={0},v2[61]={0},p1[61]={0},p2[61]={0};
+    int f[50001]={0};
+    m/=10;
+    for(i=1;i<=n;i++)
+       {
+            cin>>a>>b>>q;
+            a/=10;
+            if(q!=0)
+            {
+                    if(v1[q]==0){v1[q]=a;p1[q]=b;}
+                    else {v2[q]=a;p2[q]=b;}
+            }
+            else {v[i]=a;p[i]=b;}
+            }
+    for(int i=1;i<=n;i++)
+       for(int j=m;j>=v[i];j--)
+          {
+               f[j]=max(f[j],f[j-v[i]]+v[i]*p[i]);
+               if(j-v1[i]-v[i]>=0)f[j]=max(f[j],f[j-v1[i]-v[i]]+v1[i]*p1[i]+v[i]*p[i]);
+               if(j-v2[i]-v[i]>=0)f[j]=max(f[j],f[j-v2[i]-v[i]]+v2[i]*p2[i]+v[i]*p[i]);
+               if(j-v1[i]-v2[i]-v[i]>=0)f[j]=max(f[j],f[j-v1[i]-v2[i]-v[i]]+v1[i]*p1[i]+v2[i]*p2[i]+v[i]*p[i]);
+               mx=max(f[j],mx);
+          }
+          cout<<mx*10<<endl;
+    //system("pause");
+    return 0;
+}
+
+int main()
+{
+    while(cin>>m>>n)
+    {
+        solve();
+    }
+    return 0;
+}
diff --git a/RQNOJ/17.cpp b/RQNOJ/17.cpp
new file mode 100644
index 0000000..b6d55fc
--- /dev/null
+++ b/RQNOJ/17.cpp
@@ -0,0 +1,41 @@
+#include<iostream>
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+ 
+int s, t, m, tot = 0, ans = 0;
+long long l;
+int vis[11000] = {0};
+int sto[110] = {0};
+int f[11000] = {0};
+ 
+int main ()
+{
+    //freopen ("in.txt", "r", stdin);
+    cin >> l >> s >> t >> m;
+    for (int i = 0; i < m; i++) cin >> sto[i];
+    sort (sto, sto + m);
+    if (s == t) {
+        for (int i = 0; i < m; i++) {
+            if (!(sto[i]%s)) ans++;
+        }
+        cout << ans;
+        return 0;
+    }
+    int e;
+    if (sto[0] > 100) vis[tot = 100] = 1;
+    else vis[tot = sto[0]] = 1; 
+    for (int i = 1; i < m; i++) {
+        if ((e = sto[i] - sto[i-1]) > 100) { vis[tot += 100] = 1;}
+        else { vis[tot += e] = 1;}
+    }
+ 
+    for (int i = tot; i >= 0; i--) {
+        f[i] = 200;
+        for (int j = s; j <= t; j++) {
+            f[i] = min (f[i], f[i+j] + vis[i]);
+        }
+    }
+    cout << f[0];
+    return 0;
+ }
diff --git a/VIJOS/1002_HBat.cpp b/VIJOS/1002_HBat.cpp
new file mode 100644
index 0000000..5737ead
--- /dev/null
+++ b/VIJOS/1002_HBat.cpp
@@ -0,0 +1,78 @@
+#include <iostream>
+#include <cstdio>
+#include <algorithm>
+
+using namespace std;
+
+int stone[1000001],map[1000001],f[1000001];
+
+//int ans;
+int w=2000;
+int l,s,t,m;
+int p=0,k;/*
+inline void findd(int a)
+{
+    if(ans>w)return;
+    if(a>=p)
+    {
+        if(ans<w)w=ans;
+        return;
+    }
+    int i;
+    for(i=a+s;i<=a+t;++i)
+    {
+        if(map[i]==1)ans++;
+        findd(i);
+        if(map[i]==1)ans--;
+    }
+    return;
+}
+*/
+int main()
+{
+
+
+    scanf("%d%d%d%d",&l,&s,&t,&m);
+
+    int i,j;
+
+    for(i=1;i<=m;++i)
+        scanf("%d",&stone[i]);
+
+    sort(stone+1,stone+m+1);
+
+
+
+    for(i=1;i<=m;++i)
+    {
+        l=stone[i]-stone[i-1];
+        if(l%t==0)k=t;
+        else k=l%t+t;
+        if(l<k)k=l;
+        p+=k;
+        map[p]=1;
+    }
+    for(i=1;i<=p+t;++i)
+    {
+        w=200;
+        for(j=i-t;j<=i-s;++j)
+        {
+            if(j>=0&&f[j]<w)w=f[j];
+        }
+        /*for(j=i-t;j>=0&&j<=i-s;++j)                //把j>=0放在循环头，有时候可能导致循环不进行（开始的时候） 
+        {
+            if(f[j]<w)w=f[j];
+        }*/
+        f[i]=w+map[i];
+    }
+    w=200;
+    for(i=p;i<=p+t;++i)
+    {
+        if(f[i]<w)w=f[i];
+    }
+
+    //findd(0);
+    cout<<w;
+
+    return 0;
+}
diff --git a/VIJOS/1002_caesar_199.cpp b/VIJOS/1002_caesar_199.cpp
new file mode 100644
index 0000000..aac7d06
--- /dev/null
+++ b/VIJOS/1002_caesar_199.cpp
@@ -0,0 +1,41 @@
+#include<iostream>
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+
+int s, t, m, tot = 0, ans = 0;
+long long l;
+int vis[11000] = {0};
+int sto[110] = {0};
+int f[11000] = {0};
+
+int main ()
+{
+    //freopen ("in.txt", "r", stdin);
+    cin >> l >> s >> t >> m;
+    for (int i = 0; i < m; i++) cin >> sto[i];
+    sort (sto, sto + m);
+    if (s == t) {
+        for (int i = 0; i < m; i++) {
+            if (!(sto[i]%s)) ans++;
+        }
+        cout << ans;
+        return 0;
+    }
+    int e;
+    if (sto[0] > 100) vis[tot = 100] = 1;
+    else vis[tot = sto[0]] = 1; 
+    for (int i = 1; i < m; i++) {
+        if ((e = sto[i] - sto[i-1]) > 100) { vis[tot += 100] = 1;}
+        else { vis[tot += e] = 1;}
+    }
+
+    for (int i = tot; i >= 0; i--) {
+        f[i] = 200;
+        for (int j = s; j <= t; j++) {
+            f[i] = min (f[i], f[i+j] + vis[i]);
+        }
+    }
+    cout << f[0];
+    return 0;
+ }