delete pics to save space

1.1540.cpp

@@ -0,0 +1,18 @@
+#include<cstdio>
+int n,m,x,res,l,r,a[1005],b[1005];
+int main()
+{
+    scanf("%d%d",&m,&n);
+    for(int i=1;i<=n;i++)
+    {
+        scanf("%d",&x);
+        if(a[x]==0) 
+        {
+            res++;
+            r++; b[r]=x; a[x]=1;
+            if(r>m) l++,a[b[l]]=0;
+        }
+    }
+    printf("%d\n",res);
+    return 0;
+}