Submission #579496

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
579496	2022-06-19 09:23:25	gun_gan	Strange Device (APIO19_strange_device)	C++17	65 / 100	777 ms	127152 KiB

strange_device

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
int main()
{
  cin.tie(0) -> ios_base::sync_with_stdio(0);
 
  ll n, a, b;
  cin >> n >> a >> b;
 
  if(a > 1e18 / b)
  {
    ll sum = 0;
    for(int i = 0; i < n; i++)
    {
      ll l, r;
      cin >> l >> r;
      sum += r - l + 1;
    }
    cout << sum;
  }
  else
  {
    ll g = a * b / gcd(a, b + 1);
    map<ll, vector<ll>> M;
    for(int i = 0; i < n; i++)
    {
 
 
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