@[ljx52lm](/user/853953) ```dfs```过不了吧。。。
```cpp
#include<iostream>
using namespace std;
int a[2010] = {6},c[10]={6,2,5,5,4,5,6,3,7,6};
int main()
{
int s = 0,l;
scanf("%d",&l);
for(int i = 1;i <= 2000;i++)
{
int j = i;
while(j >= 1)
{
a[i] = a[i] + c[j % 10];
j = j / 10;
}
}
for(int i = 0;i <= 1000;i++)
for(int j = 0;j <= 1000;j++)
if((a[i] + a[j] + a[i + j] + 4) == l)
s++;
printf("%d\n",s);
return 0;
}
```
``求关``**求关**~~求关~~_求关_
by codejiahui @ 2023-03-27 19:23:05
@[codejiahui](/user/512407)
就是tle最后一个点，哎，以为能有剪枝优化啥的
by ljx_gkx @ 2023-03-27 20:15:23
```cpp
#include<stdio.h>
int main()
{
int a[2001]={6},b,c[10]={6,2,5,5,4,5,6,3,7,6},s=0,i,j;
scanf("%d",&b);
for(i=1;i<=2000;i++)
{
j=i;
while(j>=1)//求每个数所用的火柴棒
{
a[i]=a[i]+c[j%10];
j=j/10;
}
}
for(i=0;i<=1000;i++)
{
for(j=0;j<=1000;j++)
if(a[i]+a[j]+a[i+j]+4==b)s++;//还有加号与等号
}
printf("%d",s);
return 0;
}
by lienze2012 @ 2023-04-02 21:42:55
```cpp
求关注（我好像来晚了）
by lienze2012 @ 2023-04-02 21:44:15
@[codejiahui](/user/512407) 不懂就问：a[2010]={6} 是什么意思啊
by cxzhyf @ 2023-05-16 13:08:49
@[cxzhyf](/user/523553) 就是等同于`a[2010] = {6,0,0,0,...,0}`
by codejiahui @ 2023-05-16 18:35:17
@[lienze2012](/user/921677) 6复制题解
by Max6700 @ 2023-05-18 21:05:31