delete pics to save space

2.11078.cpp

@@ -0,0 +1,24 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+int a[100005],n,T;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&T);
+	while(T-->0)
+	{
+		scanf("%d",&n);
+		for(int i=0;i<n;i++) scanf("%d",&a[i]);
+		int res=a[0]-a[1],MaxAi=a[0];
+		for(int i=1;i<n;i++)
+		{
+			res=max(res,MaxAi-a[i]);
+			MaxAi=max(MaxAi,a[i]);
+		}
+		printf("%d\n",res);
+	}
+	return 0;
+}