Submission #62505980

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#include <bits/stdc++.h>
using namespace std;
#define ull unsigned long long
#define ll long long
#define pii pair<int,int>
void solve() {
    int n,m;
    cin >> n >> m;
    vector<bool> flag(n+9,1);
    for (int i = 0; i < m; i++) {
        int tmp;
        cin >> tmp;
        flag[tmp] = 0;
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        if (flag[i]) ans++; 
    }
    cout << ans << endl;
 
 
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#include <bits/stdc++.h>
using namespace std;

#define ull unsigned long long
#define ll long long
#define pii pair<int,int>

void solve() {
    int n,m;
    cin >> n >> m;
    vector<bool> flag(n+9,1);
    for (int i = 0; i < m; i++) {
        int tmp;
        cin >> tmp;
        flag[tmp] = 0;
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        if (flag[i]) ans++; 
    }
    cout << ans << endl;
    for (int i = 1; i <= n; i++) {
        if (flag[i]) cout << i << " ";
    }
}

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    for (int i = 0; i < t; i++) {
        solve();
    }
    return 0;
}

Submission Info

Judge Result