```
if(b==0)
return a[0];
```
by C3765428 @ 2019-08-24 10:53:32
@差不多会很久少了
by C3765428 @ 2019-08-24 10:54:19
主函数的if判断也有问题
by C3765428 @ 2019-08-24 10:57:00
##### 附AC代码
```
#include<iostream>
#include<cstdio>
using namespace std;
int a[10]={6,2,5,5,4,5,6,3,7,6};
int fun(int x){
int s=0;
if(x==0) return a[0];
while(x!=0){
s+=a[x%10];
x=x/10;
}
return s;
}
int main(){
int a,b,c,n;
cin>>n;
int ans=0;
for(a=0;a<1001;a++)
for(b=0;b<1001;b++)
if(fun(a)+fun(b)+fun(a+b)+4==n){
ans++;
}
cout<<ans<<endl;
return 0;
}
```
by C3765428 @ 2019-08-24 10:57:48
@[C3765428](/space/show?uid=208240) 谢谢！！
by 哈娜 @ 2019-08-24 16:16:31
和你一样，你的错是数组越界
by szyzbo @ 2019-11-03 14:14:16
附ac代码×2：
#include <iostream>
using namespace std;
int a[10]={6,2,5,5,4,5,6,3,7,6};
int hc(int x){
int s=0;
do{
s+=a[x%10];
x/=10;
}while(x>0);
return s;
}
int main(){
int n,p1,p2,sum,tot,h;
tot=h=0;
cin>>n;
n-=4;
for(p1=0;p1<=2000;p1++){
for(p2=0;p2<=2000;p2++){
sum=p1+p2,h=0;
h=hc(p1)+hc(p2)+hc(sum);
if(h==n){
tot++;
//cout<<p1<<"+"<<p2<<"="<<sum<<endl;
}
}
}
cout<<tot;
return 0;}
by fz20181223 @ 2019-11-03 15:06:22