Submission #983748

#	Time	Username	Problem	Language	Result	Execution time	Memory
983748		pcc	Strange Device (APIO19_strange_device)	C++17	5 / 100	312 ms	53592 KiB

strange_device

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

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

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>N>>A>>B;
	cyc = (A&1?A:A>>1);
	for(int i = 0;i<N;i++){
		ll 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());
	ll ans = 0,rp = 0;
	for(auto &i:v){
		if(rp<i.fs){
			ans += i.sc-i.fs+1;
			rp = i.sc+1;
		}
		else{
			ans += max(0ll,i.sc-rp+1);
			rp = max(rp,i.sc+1);
		}
	}
	cout<<ans<<'\n';
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 5 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30