#include "messy.h" #include <bits/stdc++.h> using namespace std; static int ans[128], n; void dnc1(int l, int r) { if (r - l == 1) return; int m = l + (r-l)/2; char s[n+1]; s[n] = 0; for (int i = 0; i < l; i++) s[i] = '1'; for (int i = l; i < r; i++) s[i] = '0'; for (int i = r; i < n; i++) s[i] = '1'; for (int i = l; i < m; i++) { s[i] = '1'; add_element(s); s[i] = '0'; } dnc1(l, m), dnc1(m, r); } void dnc2(int l, int r, vector <int> A) { if (r - l == 1) { ans[l] = A[0]; return; } int m = l + (r-l)/2; char s[n+1]; s[n] = 0; for (int i = 0; i < n; i++) s[i] = '1'; for (auto &e : A) s[e] = '0'; vector <int> L, R; for (auto &e : A) { s[e] = '1'; if (check_element(s)) L.emplace_back(e); else R.emplace_back(e); s[e] = '0'; } dnc2(l, m, L), dnc2(m, r, R); } void restore_permutation(int N, int w, int r, int* result) { n = N; dnc1(0, n); compile_set(); vector <int> X; for (int i = 0; i < n; i++) X.emplace_back(i); dnc2(0, n, X); for (int i = 0; i < n; i++) result[ans[i]] = i; } /* check which N/2 bits */

messy.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
messy_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
/usr/bin/ld: /tmp/cclTrFAO.o: in function `main':
grader.cpp:(.text.startup+0x16f): undefined reference to `restore_permutation(int, int, int)'
collect2: error: ld returned 1 exit status