Submission #2550083

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#define FOR(i,s, t) for(int i = s; i < t; i++)
#define ALL(a) (a).begin(),(a).end()

int main() {
	int n, m;
	cin >> n >> m;
	vector<int> a(m);
	FOR(i, 0, m) cin >> a[i];
	reverse(ALL(a));

	vector<int>b(n);
	FOR(i, 0, n) b[i] = 0;

	FOR(i, 0, m) {
		if (b[a[i] - 1] == 0) {
			cout << a[i] << endl;
			b[a[i] - 1] = 1;
		}
	}

	FOR(i, 0, n) {
		if (b[i] == 0) cout << i + 1 << endl;
	}
	return 0;
}

Submission Info

Judge Result