@[qwz1127](/user/803218)
1.死亡头文件
2.longlong
by aaaaaaaawsl @ 2022-10-18 16:56:47
@[aaaaaaaawsl](/user/307940) 通过了 感谢!
by qwz1127 @ 2022-10-18 17:06:00
@[qwz1127](/user/803218) 咋两代码一样为啥我的不行呢
```#include<stdio.h>
int main()
{
long long a1,a2,n;
long long h,sum=0;
scanf("%lld%lld%lld",&a1,&a2,&n);
h=a2-a1;
for(int i=0,temp=a1;i<n;i++)
{
sum+=temp;
temp+=h;
}
printf("%lld\n",sum);
return 0;
}
by elong123 @ 2023-02-01 17:36:47
@[elong123](/user/892700)
1.没有头文件
2.要using namespce std;
3.不要循环n次,因为公差只有n-1个
4.太多了,不讲了......
代码如下:
```cpp
#include <bits/stdc++.h>
using namespace std;
int main()
{
long long a1,a2,n=0;
scanf("%lld%lld%lld",&a1,&a2,&n);
long long d=a2-a1;
long long sum=a1;
for(int i=0;i<n-1;++i)
{
a1+=d;
sum+=a1;
}
printf("%lld",sum);
return 0;
}
```
by wangxinyu520 @ 2023-08-20 21:31:11