你或许需要使用一下Markdown
by pomelo_nene @ 2019-04-07 12:13:37
希望更丰富的展现？使用Markdown
by andyli @ 2019-04-07 12:17:30
```cpp
#include<iostream>
using namespace std;
int main()
{
long long a[10001], n, s = 0, max;
cin >> n;
for (int i = 1; i <= n; i++)
{
cin >> a[i];
}
for (int i = 2; i <= n; i++)
{
max = a[i];
if (a[i - 1] > a[i])
max = a[i - 1];
s += max;
}
cout << s;
}
```
我帮您重新发一下
by andyli @ 2019-04-07 12:18:34
@[zxwhhh](/space/show?uid=193110) 您可以看一下我的核心代码：
```cpp
int n;
cin >> n;
for (int i = 0; i < n; i++)
cin >> A[i];
for (int i = 1; i < n; i++)
ans += max(A[i - 1], A[i]);
cout << ans << endl;
```
by andyli @ 2019-04-07 12:19:50
@[zxwhhh](/space/show?uid=193110)
```cpp
const int maxn = 100005;
int A[maxn], n;
long long ans;
```
by andyli @ 2019-04-07 12:21:07
@[andyli](/space/show?uid=84282)
谢谢大佬，懂了
by zxwhhh @ 2019-04-07 12:38:58
@[andyli](/space/show?uid=84282)
```c
# include <stdio.h>
int main ()
{
int n;
scanf("%d",&n);
int old,new_;
long long length=0;
scanf("%d",&old);
for(int i=0;i<n-1;i++)
{
scanf("%d",&new_);
length+=old>new_?old:new_;
old=new_;
}
printf("%d",length);
return 0;
}
```
大佬，帮忙看下为什么我用了long long 还会报错呢？
by 水木子 @ 2019-07-28 19:52:03
@[水木子](/space/show?uid=164970) 输出需要改成`printf("%lld",length);`
by andyli @ 2019-07-28 20:46:40
@[andyli](/space/show?uid=84282) 感谢感谢！
by 水木子 @ 2019-07-29 21:27:39