제출 #138992

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
138992		Diuven	이상한 기계 (APIO19_strange_device)	C++14	100 / 100	1303 ms	65968 KiB

strange_device

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

typedef long long lint;
const lint LNF = 2e18;

int n;
lint A, B;

lint gcd(lint a, lint b){ return (b==0 ? a : gcd(b, a%b)); }

int main(){
	ios::sync_with_stdio(0); cin.tie(0);

	cin>>n>>A>>B;
	lint g = gcd(A, B+1), a=A/g;
	lint T = LNF;
	if(a<=LNF/B) T = a*B;

	map<lint, int> mp;
	for(int i=1; i<=n; i++){
		lint l,r; cin>>l>>r;
		if(r-l+1>=T) mp[0]++, mp[T]--;
		else{
			l%=T, r%=T;
			if(l<=r) mp[l]++, mp[r+1]--;
			else mp[0]++, mp[r+1]--, mp[l]++, mp[T]--;
		}
	}
	mp[T] = 0;
	lint xp = 0, cnt = 0, ans = 0;
	for(auto p:mp){
		lint x = p.first;
		if(cnt>0) ans += x-xp;
		cnt+=p.second;
		xp =  x;
	}
	cout<<ans<<'\n';

	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30