Submission #1265278

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265278		FernandoJC07	Data Transfer (IOI19_transfer)	C++20	Compilation error	0 ms	0 KiB

transfer

vi get_attachment(vi source){
    int N = source.size();
    int xr = 0, s = 0;
    For(i, 1, N+1){ xr ^= source[i-1]*i; s+=source[i-1];}
    //cout<<xr<<endl;
    vi ans = source;
    int l = log2(N);
    forn(i, l+1) {xr&(1<<i) ?  ans.pb(1) : ans.pb(0);}
    //mos(ans);
    ans.pb(s%2);
    return ans;
}

vi retrieve(vi data){
    int N;
    data.size()>255 ? N=255 : N=63;
    int xr = 0, s = 0;
    vi ans;
    For(i, 1, N+1) { xr ^= data[i-1]*i; s+=data[i-1]; ans.pb(data[i-1]);}
    int k = 0;
    For(i, N, data.size()-1) k += (data[i]<<(i-N));
    int puta = k^xr;
    if(puta==0) return ans;
    if(s%2 == data[data.size()-1]) return ans;
    ans[puta-1] ^= 1;
    return ans;
}

Compilation message (stderr)

transfer.cpp:1:1: error: 'vi' does not name a type; did you mean 'void'?
    1 | vi get_attachment(vi source){
      | ^~
      | void
transfer.cpp:14:1: error: 'vi' does not name a type; did you mean 'void'?
   14 | vi retrieve(vi data){
      | ^~
      | void