제출 #983752

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
983752		pcc	Strange Device (APIO19_strange_device)	C++17	100 / 100	443 ms	70400 KiB

strange_device

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

#define ll __int128_t
#define pll pair<ll,ll>
#define fs first
#define sc second
ll N,A,B;
ll cyc;
vector<pll> v;

ll gcd(ll a,ll b){
	if(a<b)swap(a,b);
	while(b){
		a %= b;
		swap(a,b);
	}
	return a;
}

ll get_cyc(){
	ll re = B;
	ll tmp = (B+1)%A;
	if(!tmp)return B;
	tmp = A/gcd(A,B+1);
	return tmp*B;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	long long buf;
	cin>>buf;N = buf;
	cin>>buf;A = buf;
	cin>>buf;B = buf;
	cyc = get_cyc();
	for(int i = 0;i<N;i++){
		long long l,r;
		cin>>l>>r;
		if(r-l+1>=cyc)v.push_back(pll(0,cyc-1));
		else{
			if(l%cyc>r%cyc){
				v.push_back(pll(l%cyc,cyc-1));
				v.push_back(pll(0,r%cyc));
			}
			else{
				v.push_back(pll(l%cyc,r%cyc));
			}
		}
	}
	sort(v.begin(),v.end());
	long long ans = 0;
	ll rp = 0;
	for(auto &i:v){
		if(rp<i.fs){
			ans += i.sc-i.fs+1;
			rp = i.sc+1;
		}
		else{
			ans += max((ll)0,i.sc-rp+1);
			rp = max(rp,i.sc+1);
		}
	}
	cout<<ans<<'\n';
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

strange_device.cpp: In function '__int128 get_cyc()':
strange_device.cpp:22:5: warning: unused variable 're' [-Wunused-variable]
   22 |  ll re = B;
      |     ^~

• 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