Submission #1218865

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218865		vidux	Sorting (IOI15_sorting)	C++17	Compilation error	0 ms	0 KiB

sorting

#include "sorting.h"

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef pair<ll, ll> pll;
typedef vector<ll> vl;

const ll LLINF = 1e18;

int findSwapPairs(int N, int a[], int M, int X[], int Y[], int P[], int Q[]) {
	int n = N;
	int l = 0, r = M;
	auto opCnt = [&]() -> ll {
		vi pos(n);
		vi b(n);
		ll cnt = 0;
		for (int i = 0; i < n; i++) pos[a[i]] = i, b[i] = a[i];
		for (int i = 0; i < n; i++) {
			if (pos[i] != i) {
				int p = pos[i];
				swap(b[i], b[p]);
				swap(pos[i], pos[b[p]]);
				P[cnt] = i;
				Q[cnt] = p;
				cnt++;
			}
		}
		return cnt;
	};
	int ans = opCnt();
	//cout << ans << endl;
	//for (int i = 0; i < ans; i++) cout << P[i] << " " << Q[i] << endl;
	if (Y[0] == 1 && ans%2) p[ans] = 0, q[ans++] = 1;
	return ans;
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:37:33: error: 'p' was not declared in this scope
   37 |         if (Y[0] == 1 && ans%2) p[ans] = 0, q[ans++] = 1;
      |                                 ^
sorting.cpp:37:45: error: 'q' was not declared in this scope
   37 |         if (Y[0] == 1 && ans%2) p[ans] = 0, q[ans++] = 1;
      |                                             ^