제출 #447193

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
447193	2021-07-25 05:22:12	Ya_Ali	이상한 기계 (APIO19_strange_device)	C++17	15 / 100	629 ms	17040 KiB

strange_device

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/* ** *** In the name of God *** ** */
// Only Haider is Amir al-Momenin
#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ll;
const ll maxn = 1e5 + 10;
const ll mod = 1e9 + 7;
const ll inf = 1e18 + 1;
// #define endl '\n'
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
 
  ll n, A, B;
  cin >> n >> A >> B;
  ll x = 1ll * A / __gcd(A, B + 1);
  if (x <= inf / B) x *= B;
  else x = inf;
  vector<pair<ll, ll>> b;
  while (n--) {
    ll l, r;
    cin >> l >> r;
    // l--, r--;
    if (r - l + 1 >= x) return cout << x, 0;
    l %= x, r %= x;
    if (r >= l) b.push_back({l, r});
    else b.push_back({l, x - 1}), b.push_back({0, r});
  }
  sort(b.begin(), b.end());
  ll p = 0, ans = x;
 
 
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