Submission #69144

#TimeUsernameProblemLanguageResultExecution timeMemory
69144mr_bananaUnscrambling a Messy Bug (IOI16_messy)C++17
100 / 100
4 ms512 KiB
#include <bits/stdc++.h> #include "messy.h" using namespace std; int N; const int MN=500; void writ(int l,int r){ if(r-l<2){ return; } string s; int mid=(l+r)/2; for(int i=0;i<l;i++){ s+='1'; } for(int i=l;i<r;i++){ s+='0'; } for(int i=r;i<N;i++){ s+='1'; } for(int i=l;i<mid;i++){ s[i]='1'; add_element(s); s[i]='0'; } writ(l,mid); writ(mid,r); } int p[MN]; void restore(int l,int r,set<int> pos){ string s; for(int i=0;i<N;i++){ if(pos.count(i)==0){ s+='1'; } else{ s+='0'; } } if(r-l<2){ p[*pos.begin()]=l; return; } set<int> pos1,pos2; for(int i:pos){ s[i]='1'; if(check_element(s)){ pos1.insert(i); } else{ pos2.insert(i); } s[i]='0'; } int mid=(l+r)/2; restore(l,mid,pos1); restore(mid,r,pos2); } vector<int> restore_permutation(int n, int w, int r) { N=n; writ(0,N); compile_set(); set<int> s; for(int i=0;i<N;i++){ s.insert(i); } restore(0,N,s); vector<int> v; for(int i=0;i<n;i++){ v.push_back(p[i]); } return v; }
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