归类了 OJ，整理了一下

XSM OJ 重庆小码王集团OJ/小码君的实验室5.cpp

@@ -0,0 +1,31 @@
+#include <algorithm>
+#include <iostream>
+#include <iomanip>
+#include <cstring>
+#include <cstdio>
+#include <stack>
+#include <ctime>
+#include <cmath>
+#include <queue>
+typedef long long l;
+typedef double d;
+typedef char c;
+using namespace std;
+int n;
+int x,t,res=-9999999;
+int arr;
+int main(){
+	cin.tie(NULL);
+	cout.tie(NULL);
+	cin >>n;
+	for(int i=1;i<=n;i++){
+		cin >>arr;
+		if(i==1){
+			t=arr;
+		}
+		res=max(arr-t,res);
+		t=min(t,arr);
+	}
+	cout <<res;
+	return 0;
+}