Submission #571849

#TimeUsernameProblemLanguageResultExecution timeMemory
571849RandomLBData Transfer (IOI19_transfer)C++17
0 / 100
10 ms4340 KiB
#include <bits/stdc++.h> using namespace std; std::vector<int> get_attachment(std::vector<int> v){ int xr = 0; for (int i = 0; i < (int)v.size(); i++) xr ^= (i+1)*v[i]; int on = 0; for (int i = 0; i < ((int)v.size()==63?6:8); i++){ v.push_back(xr&(1<<i)?1:0); if (xr&(1<<i)) on ^= 1; } v.push_back(on); return v; } std::vector<int> retrieve(std::vector<int> v){ int n = ((int)v.size() < 100? 63 : 255); int xr = 0; std::vector<int> res; for (int i = 0; i < n; i++){ xr ^= (i+1)*v[i]; res.push_back(v[i]); } int check = 0, on = 0; for (int i = 0; i < (n==63?6:8); i++){ if (v[n+i]){ check ^= (1<<i); on ^= 1; } } if (xr != check && on == v.back()) res[(xr^check)-1] ^= 1; return res; }
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