Submission #1247716

#	Time	Username	Problem	Language	Result	Execution time	Memory
1247716		m_bezrutchka	Unscrambling a Messy Bug (IOI16_messy)	C++20	Compilation error	0 ms	0 KiB

messy

#include <vector>
#include "messy.h"
using namespace std;

vector<int> restore_permutation(int n, int w, int r) {
    string s = "";
    for (int i = 0; i < n; i++) {
        s.push_back('0');
    }
    for (int i = 0; i < n; i++) {
        s[i] = '1';
        add_element(s);
    }

    compile_set();

    for (int i = 0; i < n; i++) {
        s[i] = '0';
    }
    int first_idx = -1;
    for (int i = 0; i < n; i++) {
        s[i] = '1';
        if (!check_element(s)) {
            first_idx = i;
            break;
        }
    }

    vector<int> p;
    for (int i = 0; i < n; i++) {
        p.push_back(i);
    }

    // identity case
    if (first_idx == -1) return p;

    s[first_idx] = '0';
    int second_idx = -1;
    for (int i = first_idx + 1; i < n; i++) {
        s[i] = '1';
        if (check_element(s)) {
            second_idx = i;
            break;
        }
        s[i] = '0';
    }

    assert(second_idx != -1);
    swap(p[first_idx], p[second_idx]);
    return p;
}

Compilation message (stderr)

messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:48:5: error: 'assert' was not declared in this scope
   48 |     assert(second_idx != -1);
      |     ^~~~~~
messy.cpp:3:1: note: 'assert' is defined in header '<cassert>'; did you forget to '#include <cassert>'?
    2 | #include "messy.h"
  +++ |+#include <cassert>
    3 | using namespace std;
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
      |         ^~~~