제출 #729558

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
729558		danikoynov	이상한 기계 (APIO19_strange_device)	C++14	5 / 100	5038 ms	524288 KiB

strange_device

#include<bits/stdc++.h>
#define endl '\n'

using namespace std;
typedef long long ll;

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

const int maxn = 1e6 + 10;

int n;
ll l[maxn], r[maxn];
ll A, B;


void solve()
{
    cin >> n >> A >> B;
    for (int i = 1; i <= n; i ++)
    {
        cin >> l[i] >> r[i];
    }
    if (n == 1)
    {
        ll ans = (r[1] - l[1] + 1);
        if (ans / B > A)
            ans = min(ans, A * B);
        cout << ans << endl;
        return;
    }
    if ((ll)(2e18) / B < A)
    {
        ll ans = 0;
        for (int i = 1; i <= n; i ++)
            ans = ans + (r[i] - l[i] + 1);
        cout << ans << endl;
        return;
    }
    unordered_set < ll > st;
    for (int i = 1; i <= n; i ++)
    {

        for (ll j = l[i]; j <= r[i]; j ++)
        {
            st.insert(j % (A * B));
        }
    }

    cout << st.size() << endl;
}

int main()
{
    solve();
    return 0;
}
/**
7 3
4 1 3 4 0 2 3
*/

• Subtask 1: 0 / 10
• Subtask 2: 5 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30