Submission #372463

#	Time	Username	Problem	Language	Result	Execution time	Memory
372463		hivakarami	Strange Device (APIO19_strange_device)	C++14	0 / 100	5089 ms	11244 KiB

strange_device

#include<bits/stdc++.h>
 
using namespace std;
 
typedef long long int ll;
typedef long double ld;
#define f first
#define s second
 
const int N = 1e6 + 100;
const ll mod = 1e9 + 7;
const ll inf = 1e18 + 10;

bool mark[N];

int main()
{
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	
	int n;
	ll a, b;
	cin >> n >> a >> b;
	ll k = a / __gcd(a, b+1);
	if(k > inf/b)
		k = inf;
	else
		k *= b;
	
	while(n--)
	{
		ll l, r;
		cin >> l >> r;
		
		if(r - l + 1 >= k)
		{
			cout << k << endl;
			return 0;
		}
		
		for(ll i = l; i <= r; i++)
			mark[(i%k)] = 1;
		
	}
	ll ans = 0;
	for(int i = 0; i < k; i++)
		ans += mark[i];
	cout << ans << endl;
	
	
    return 0;
}


 

• Subtask 1: 0 / 10
• Subtask 2: 0 / 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