Submission

PPPPPPPPPP

Score: 100

User: Monasm

Problemset: เรือสำราญ

Language: cpp

Time: 0.271 second

Submitted On: 2024-09-25 19:29:57

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

int main() {
    int k, t, n;
    cin >> k >> t >> n;
    vector<int> a;
    for (int i = t; i <= k; i += t) {
        a.push_back(i);
    }
    set<int> e;
    for (int i = 0; i < n; i++) {
        int u, v;cin >> u >> v;
        for (int j = u; j <= v; j++) {
            e.insert(j);
        }
    }
    vector<int> ans;
    for (auto i : a) {
        if (e.find(i) == e.end()) {
            ans.push_back(i);
        }
    }
    if (ans.empty()) {
        cout << "no" << endl;
    } else {
        cout << ans.size() << endl;
        for (auto i : ans) {
            cout << i << endl;
        }
    }
    return 0;
}