Submission #602587

#TimeUsernameProblemLanguageResultExecution timeMemory
602587patrikpavic2Permutation (APIO22_perm)C++17
10 / 100
1088 ms340 KiB
#include "perm.h" #include <vector> #include <algorithm> #define PB push_back using namespace std; typedef vector < int > vi; typedef long long ll; vi construct_permutation(long long k){ k--; if(k == 0) return {}; if(k == 1) return {0}; if(k == 2) return {1, 0}; if(k % 5 == 4){ vi st = construct_permutation((k - 4) / 5 + 1); st.PB((int)st.size() + 1); st.PB((int)st.size() + 1); st.PB((int)st.size() - 2); } if(k % 4 == 3){ vi st = construct_permutation((k - 3) / 4 + 1); st.PB((int)st.size()); st.PB((int)st.size()); return st; } if(k % 3 == 2){ vi st = construct_permutation((k - 2) / 3 + 1); st.PB((int)st.size() + 1); st.PB((int)st.size() - 1); return st; } vi st = construct_permutation((k - 1) / 2 + 1); st.PB((int)st.size()); if(!(k & 1)){ for(int& x : st) x++; st.PB(0); } return st; }
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