Submission #976100

#	Time	Username	Problem	Language	Result	Execution time	Memory
976100		rythm_of_knight	Permutation (APIO22_perm)	C++17	Compilation error	0 ms	0 KiB

perm

#include "perm.h"
#define int long long
using namespace std;
vector<int> construct_permutation(int k) {
    int temp = --k;
    vector <int> v;
    while (temp) {
        v.push_back(temp & 1);
        temp >>= 1;
    }
    int sz = v.size();
    for (int i = 0; i < sz; i++) {
        while (i > 0 && v[i - 1] == 0 && v[i] > 0) {
            v[i - 1] += 2;
            v[i]--;
            i--;
        }
    }
    int cnt = -1;
    vector <int> ans;
    for (int i = 0; i < sz; i++) {
        vector <int> t;
        while (v[i]--) {
            t.push_back(++cnt);
        }
        reverse(t.begin(), t.end());
        for (int &u : t) {
            ans.push_back(u);
        }
    }
    int ret[ans.size()];
    for (int i = 0; i < ans.size(); i++) {
        ret[i] = ans[i];
    }
    return ret;
}

Compilation message (stderr)

perm.cpp:4:13: error: ambiguating new declaration of 'std::vector<long long int> construct_permutation(long long int)'
    4 | vector<int> construct_permutation(int k) {
      |             ^~~~~~~~~~~~~~~~~~~~~
In file included from perm.cpp:1:
perm.h:3:18: note: old declaration 'std::vector<int> construct_permutation(long long int)'
    3 | std::vector<int> construct_permutation(long long k);
      |                  ^~~~~~~~~~~~~~~~~~~~~
perm.cpp: In function 'std::vector<long long int> construct_permutation(long long int)':
perm.cpp:26:9: error: 'reverse' was not declared in this scope
   26 |         reverse(t.begin(), t.end());
      |         ^~~~~~~
perm.cpp:32:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i = 0; i < ans.size(); i++) {
      |                     ~~^~~~~~~~~~~~
perm.cpp:35:12: error: could not convert 'ret' from 'long long int [(<anonymous> + 1)]' to 'std::vector<long long int>'
   35 |     return ret;
      |            ^~~
      |            |
      |            long long int [(<anonymous> + 1)]