Submission #198262

#	Time	Username	Problem	Language	Result	Execution time	Memory
198262		AMO5	Strange Device (APIO19_strange_device)	C++98	0 / 100	5075 ms	524292 KiB

strange_device

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair < ll ,ll> pll; 

ll n,a,b;
map < pll , ll >vis;

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> n >> a >> b;
	ll le,ri, ans = 0;
	bool all = 0;
	if(n==1){
		cin >> le >> ri;
		if(ri-le+1>=a*b){
			ans = a*b;
		}else{
			le %= (a*b);
			ri %= (a*b);
			ans = abs(ri-le+1);
			if(le>ri){
				ans = a*b-ans;
			}
		}
		cout << ans << endl;
		return 0;
	}
	for(ll i = 0; i < n; i++){
		cin >> le >> ri;
		if(ri-le+1>=a*b){
			all = 1;
		}
		for(ll j = le; j <= ri&&!all; j++){
			ll t = j;
			ll x = (t+(t/b))%a;
			ll y = t%b;
			if(!vis[{x,y}]){
				ans++;
			}
			vis[{x,y}]++;
		}
	}
	if(all)ans=a*b;
	cout << ans << endl;
}

• 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