Submission #737372

#	Time	Username	Problem	Language	Result	Execution time	Memory
737372		yellowtoad	Permutation (APIO22_perm)	C++17	Compilation error	0 ms	0 KiB

perm

#include <iostream>
using namespace std;

int[] construct_permutation(int64 k) {
	long long int n = k, cnt = 1, sz, a[110];
	for (int i = 1; i <= 100; i++) a[i] = 0;
	while ((1LL<<cnt)-1 <= n) cnt++;
	cnt--;
	sz = cnt;
	n -= (1LL<<cnt)-1;
	for (int i = 1; i <= cnt; i++) a[i] = i-1;
	while (cnt >= 0) {
		if ((1LL<<cnt) <= n) {
			n -= (1LL<<cnt);
			for (int i = sz; i >= 1; i--) a[i+1] = a[i];
			sz++;
			if (cnt) a[1] = a[sz-cnt+1];
			else a[1] = a[sz]+1;
			for (int i = sz; i >= sz-cnt+1; i--) a[i]++;
		}
		cnt--;
	}
	long long ans[sz];
	for (int i = 0; i < sz; i++) ans[i] = a[i+1];
	return ans[i];
}

/*int main() {
	long long int k, b[];
	cin >> k;
	b = construct_permutation(int64 k);
	for (int i = 0; i < sz; i++) cout << b[i] << " ";
}*/

Compilation message (stderr)

perm.cpp:4:4: error: structured binding declaration cannot have type 'int'
    4 | int[] construct_permutation(int64 k) {
      |    ^~
perm.cpp:4:4: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
perm.cpp:4:4: error: empty structured binding declaration
perm.cpp:4:7: error: expected initializer before 'construct_permutation'
    4 | int[] construct_permutation(int64 k) {
      |       ^~~~~~~~~~~~~~~~~~~~~