Submission #1174717

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174717		Halym2007	Strange Device (APIO19_strange_device)	C++17	100 / 100	285 ms	18800 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;

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());
	ll jogap = 0;
	ll l = -1, r = -1;
	for (pii i : v) {
		if (~l) {
			if (l <= i.ff and i.ff <= r) {
				r = max (r, i.ss);
			}
			if (i.ff > r) {
				jogap += r - l + 1;
				l = i.ff;
				r = i.ss;
			}
		}
		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: 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