diff --git a/POJ/1176.cpp b/POJ/1176.cpp
new file mode 100644
index 0000000..1010ec9
--- /dev/null
+++ b/POJ/1176.cpp
@@ -0,0 +1,103 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <vector>
+#include <string>
+#include <algorithm>
+using namespace std;
+#define MAXN 128
+int N,C;
+int a[MAXN];
+
+void proca()
+{
+    for(int i=1;i<=N;i++)
+        a[i]=!a[i];
+}
+void procb()
+{
+    for(int i=1;i<=N;i+=2)
+        a[i]=!a[i];
+}
+void procc()
+{
+    for(int i=2;i<=N;i+=2)
+        a[i]=!a[i];
+}
+void procd()
+{
+    for(int i=1;i<=N;i+=3)
+        a[i]=!a[i];
+}
+int isopen[MAXN];
+int isclose[MAXN];
+bool check()
+
+{
+    /// check
+    for(int i=1;i<=N;i++)
+    {
+        if(isopen[i]&&a[i]!=1) return false;
+        if(isclose[i]&&a[i]!=0) return false;
+    }
+    return true;
+}
+vector<string> ans;
+void DFS(int step)
+{
+    if(step==C)
+    {
+        if(check())
+        {
+            string s;
+            for(int i=1;i<=N;i++)
+            {
+                s.push_back(a[i]+'0');
+            }
+            ans.push_back(s);
+        }
+        return;
+    }
+    proca();
+    DFS(step+1);
+    proca();
+
+    procb();
+    DFS(step+1);
+    procb();
+
+    procc();
+    DFS(step+1);
+    procc();
+
+    procd();
+    DFS(step+1);
+    procd();
+}
+int main()
+{
+    /// Input Start
+    scanf("%d",&N);
+    scanf("%d",&C);
+    if(C>4) C=4-C%2;
+    int tmp;
+    while(scanf("%d",&tmp)==1&&tmp!=-1) isopen[tmp]=1;
+    while(scanf("%d",&tmp)==1&&tmp!=-1) isclose[tmp]=1;
+    for(int i=1;i<=N;i++) /// 1 ON , 0 OFF
+    {
+        a[i]=1;
+    }
+    DFS(0);
+    sort(ans.begin(),ans.end());
+    printf("%s\n",ans.at(0).c_str());
+    int last=0;
+    for(size_t i=1;i<ans.size();i++)
+    {
+        if(ans.at(i)!=ans.at(last))
+        {
+            printf("%s\n",ans.at(i).c_str());
+            last=i;
+        }
+    }
+    return 0;
+}