oj.uz

Submission #571846

# Submission time Handle Problem Language Result Execution time Memory
571846 2022-06-02T21:34:22 Z RandomLB Data Transfer (IOI19_transfer) C++17
0 / 100
 9 ms 4448 KB 
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
#define siz(x) (int)x.size()

vi get_attachment(vi v){
    int xr = 0;
    for (int i = 0; i < siz(v); i++) xr ^= (i+1)*v[i];
    int on = 0;
    for (int i = 0; i < __lg(siz(v)+1); i++){
        v.push_back(xr&(1<<i)?1:0);
        if (xr&(1<<i)) on ^= 1;
    }
    v.push_back(on);
    return v;
}

vi retrieve(vi v){
    int n = (siz(v) < 100? 63 : 255);
    int xr = 0;
    vi res;
    for (int i = 0; i < n; i++){
        xr ^= (i+1)*v[i];
        res.push_back(v[i]);
    }
    int check = 0;
    for (int i = 0; i < __lg(n+1); i++) if (v[n+i]) check ^= (1<<i);
    //cout << xr << " " << check << "\n";
    if (xr != check && __builtin_popcount(check)%2 == v.back()) res[(xr^check)-1] ^= 1;
    return res;
}

Subtask #1
0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 904 KB WA in grader: wrong source retrieval
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 4448 KB WA in grader: wrong source retrieval
2 Halted 0 ms 0 KB -