Submission #1367137

#	Time	Username	Problem	Language	Result	Execution time	Memory
1367137		Nxmkxing	Strange Device (APIO19_strange_device)	C++20	5 / 100	159 ms	15960 KiB

strange_device

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

using ll = long long;
using pll = pair<long long, long long>;

const int N = 1e6 + 10;
ll n, a, b, l[N], r[N];
vector<ll> vec[N];

ll gcd(ll a, ll b) {
    if (b == 0) return a;
    return gcd(b, a % b);
}

int main() {
    cin.tie(nullptr)->ios_base::sync_with_stdio(false);
    cin >> n >> a >> b;
    set<pll> st;
    for (int i = 1; i <= n; i++) {
        cin >> l[i] >> r[i];
    }
    ll sz = r[1] - l[1] + 1;
    ll blocks = sz / b;
    ll left = sz % b;
    ll mx = a / gcd(b + 1, a);
    if (blocks < mx) {
        cout << blocks * b + left;
    }
    else if (blocks == mx) {
        cout << blocks * b;
    }
    else {
        cout << mx * b;
    }
}

• 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