제출 #412875

#제출 시각아이디문제언어결과실행 시간메모리
412875FalconUnscrambling a Messy Bug (IOI16_messy)C++17
100 / 100
3 ms492 KiB
#include <vector> #include <cassert> #include <algorithm> #include <iostream> #include "messy.h" using namespace std; void add_interval(int l, int r, int n) { if(r - l == 1) return; string s(n, '0'); for(int i{0}; i < l; ++i) s[i] = '1'; for(int i{r}; i < n; ++i) s[i] = '1'; int m{(l + r) >> 1}; for(int i{l}; i < m; ++i) { s[i] = '1'; add_element(s); s[i] = '0'; } add_interval(l, m, n); add_interval(m, r, n); } vector<int> p; void solve_interval(int l, int r, int n, string s) { if(r - l == 1) { for(int i{}; i < n; ++i) if(s[i] == '0') p[i] = l; return; } vector<int> in, out; for(int i{}; i < n; ++i) { if(s[i] == '0') { s[i] = '1'; if(check_element(s)) in.push_back(i); else out.push_back(i); s[i] = '0'; } } for(int i: out) s[i] = '1'; solve_interval(l, (l + r) >> 1, n, s); for(int i: out) s[i] = '0'; for(int i: in) s[i] = '1'; solve_interval((l + r) >> 1, r, n, s); } vector<int> restore_permutation(int n, int, int) { p.resize(n); add_interval(0, n, n); compile_set(); solve_interval(0, n, n, string(n, '0')); return p; }
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