Submission #1174713

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174713		Halym2007	Strange Device (APIO19_strange_device)	C++17	15 / 100	342 ms	16980 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define sz size()
#define ff first
#define ss second
#define pb push_back
#define pii pair <ll, ll>
#define dur exit(0)
#define dur1 return(0)
const int N = 2e5 + 5;
ll n, A, B;


bool cmp (pii a, pii b) {
	if (a.ff < b.ff) return 1;
	if (a.ff == b.ff and a.ss >= b.ss) return 1;
	return 0;
}

int main () {
//	freopen ("input.txt", "r", stdin);
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> A >> B;
	__int128 rep = (__int128)A / (__int128)__gcd (A, B + 1) * (__int128)B;
	vector <pii> v;
	for (int i = 1; i <= n; ++i) {
		ll l, r;
		cin >> l >> r;
		if (r - l + 1 >= rep) {
			v.pb ({0, rep - 1});
		}
		else if (l % rep <= r % rep) {
			v.pb ({l % rep, r % rep});
		}
		else {
			v.pb ({l % rep, rep - 1});
			v.pb ({0, r % rep});
		}
	}
	sort (v.begin(), v.end(), cmp);
	ll jogap = 0;
	ll l = -1, r = -1;
//	for (pii i : v) {
//		cout << i.ff << " " << i.ss << "\n";
//	}
//	continue;
	for (pii i : v) {
		if (~l) {
			if (l <= i.ff and i.ss <= r) continue;
			if (i.ff <= r and i.ss >= r) {
				l = r + 1;
				r = i.ss;
			}
			else {
				l = i.ff;
				r = i.ss;
			}
			jogap += r - l + 1;
		}
		else {
			l = i.ff, r = i.ss;
			jogap += r - l + 1;
		}
	}
	cout << jogap;
}
/*
3 3 3
4 4
7 9 
17 18

3 5 10
1 20
50 68
89 98

2 16 13
2 5
18 18
*/

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