这叫实力!
#include<bits/stdc++.h>
using namespace std;
int n;
int a[15];
bool zhi(int x)
{
if(x<2)
return false;
for(int i=2;i*i<=x;i++)
if(x%i0)
return false;
return true;
}
int main()
{
cin>>n;
for(int i=1;i<=n;i++)
cin>>a[i];
if(n1)
{
int ans=0;
if(zhi(a[1]))
ans++;
cout<<ans;
}
else if(n2)
{
int ans=0;
if(zhi(a[1]))
ans++;
if(zhi(a[2]))
ans++;
if(zhi( a[1]+a[2] ))
ans++;
cout<<ans;
}
else if(n3)
{
int ans=0;
if(zhi( a[1] ))
ans++;
if(zhi( a[2] ))
ans++;
if(zhi( a[3] ))
ans++;
if(zhi( a[1] +a[2]))
ans++;
if(zhi( a[1] +a[3]))
ans++;
if(zhi( a[2] +a[3]))
ans++;
if(zhi( a[1] +a[2]+a[3]))
ans++;
cout<<ans;
}
else if(n==4)
{
int ans=0;
for(int i=1;i<=n;i++)
if(zhi(a[i]))
ans++;
for(int i=1;i<=n;i++)
for(int j=i+1;j<=n;j++)
if(i!=j)
if(zhi(a[i]+a[j]))
ans++;
}