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;
+ }