Submission #1268742

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268742		BlockOG	Unscrambling a Messy Bug (IOI16_messy)	C++20	Compilation error	0 ms	0 KiB

messy

#include <bits/stdc++.h>

// mrrrow meeow :3
// go play vivid/stasis now! it's free on steam

#define fo(i, a, b) for (auto i = (a); i < (b); i++)
#define of(i, a, b) for (auto i = (b); i-- > (a);)
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define lb lower_bound
#define ub upper_bound
#define be(a) a.begin(), a.end()
using namespace std;

int ____init = [] {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    return 0;
}();

void add_element(string x);
void compile_set();
bool check_element(string x);

void fill(int l, int r, int n) {
    if (r - l <= 1) return;
    int m = (l + r) / 2;

    string thing, thing2;
    fo(_, 0, l) thing += '1';
    fo(_, l + 1, n) thing2 += '0' + (_ >= r);
    fo(i, l, m) {
        add_element(thing + '1' + thing2);
        thing += '0';
        thing2 = thing2.substr(1);
    }

    fill(l, m, n);
    fill(m, r, n);
}

void get(set<int> curr, int l, int r, int n, int *result) {
    if (r - l <= 1) {
        result[*curr.begin()] = l;
        return;
    }
    int m = (l + r) / 2;

    set<int> left, right;
    for (int i : curr) {
        string thing;
        fo(j, 0, n) thing += '0' + (!curr.count(j) || j == i);
        if (check_element(thing)) left.insert(i);
        else right.insert(i);
    }

    get(left, l, m, n, result);
    get(right, m, r, n, result);
}

void restore_permutation(int n, int w, int r, int *result) {
    fill(0, n, n);
    compile_set();
    set<int> curr;
    fo(i, 0, n) curr.insert(i);
    get(curr, 0, n, n, result);
}

Compilation message (stderr)

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/cc3DdamM.o: in function `main':
grader.cpp:(.text.startup+0x16f): undefined reference to `restore_permutation(int, int, int)'
collect2: error: ld returned 1 exit status