124962024-12-19 11:31:18nkbalintToronyépítés (1,1,3,3)cpp17Compilation error
int n,i;
long long v[1000001];

int main()
{
    cin>>n;
    v[1]=2;
    v[2]=4;
    v[3]=10;
    if(n>3)
    {
        for(i=4;i<=n;++i)
        {
            v[i]=(2*v[i-1]+2*v[i-3])%20210108;
        }
    }
    cout<<v[n];
}
Compilation error
open /var/local/lib/isolate/409/box/a.out: no such file or directory
main.cpp: In function 'int main()':
main.cpp:6:5: error: 'cin' was not declared in this scope
    6 |     cin>>n;
      |     ^~~
main.cpp:17:5: error: 'cout' was not declared in this scope
   17 |     cout<<v[n];
      |     ^~~~