???求调

#include <bits/stdc++.h>
using namespace std;
int t，db[100]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535,131071};
bool isprime(int x)
{
    for(int i=2;i*i<=x;i++)
        {
            if(x%i==0)
            {
                return false;
            }
        }
    return true;
}
int main()
{
    cin>>t;
    while(t--)
        {
            int n,ans=0;
            cin>>n;
            for(int i=n;i>=2;i--)
                {
                    if(isprime(i)==true)
                    {
                        n-=i;
                        ans++;
                    }
                }
            if(n==0)
            {
                cout<<ans<<endl;
                continue;
            }
            for(int i=1;i<=17;i++)
                {
                    if(n==db[i])
                    {
                        cout<<ans+i<<endl;
                        continue;
                    }
                }
            cout<<-1<<endl;
        }
    return 0;
}