3 1 4 6 2 1 5
36
#include
int main()
{
int a[1000],b[1000];
int i,n,sum=0;
while(~scanf(“%d”,&n))
{for(i=0;i
for(i=0;i
for(i=0;i
sum+=a[i]*b[i];}
printf(“%d\n”,sum);}
sum=0;
return 0;
}
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