delete pics to save space

1.2396.cpp

@@ -0,0 +1,38 @@
+#include<cstdio>
+template<typename T> inline void read(T& t)
+{
+    t=0; bool f=false; char ch;
+    while(ch=getchar(),!((ch>='0'&&ch<='9')||ch=='-'));
+    if(ch=='-') f=true,ch=getchar();
+    t=ch-'0';
+    while(ch=getchar(),ch>='0'&&ch<='9') t=t*10+ch-'0';
+    if(f) t=-t;
+}
+template<typename T,typename... Args> inline void read(T& t,Args&... args) { read(t); read(args...); }
+const int maxn=24,P=1e9+7;
+int n,m,b[2],f[1<<maxn], dis[1<<maxn];
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+    read(n);
+    for(int i=0;i<n;i++) read(dis[1<<i]);
+    read(m); if(m>0) read(b[0]); if(m>1) read(b[1]);
+    f[0]=1;
+    for(int i=1;i<(1<<n);i++)
+	{
+        int j=i&-i,k=i;
+        dis[i]=dis[i^j]+dis[j];
+        if(dis[i]==b[0]||dis[i]==b[1]) continue;
+        while(k)
+		{
+            j=k&-k;
+            f[i]+=f[i^j];
+            if(f[i]>=P) f[i]-=P;
+            k^=j;
+        }
+    }
+    printf("%d\n",f[(1<<n)-1]);
+    return 0;
+}