Submission #1035164

#	Time	Username	Problem	Language	Result	Execution time	Memory
1035164		Halym2007	Strange Device (APIO19_strange_device)	C++17	10 / 100	311 ms	69692 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define sz size()
#define pii pair <ll, ll>
const int N = 1e6 + 5;
#define ll long long
#define pb push_back
vector <pii> v;
ll n, a, b, l[N], r[N];
int main () {
//	freopen ("input.txt", "r", stdin);
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> a >> b;
	__int128 m = a / __gcd (a, b + 1) * b;
	bool tr = 0;
	for (int i = 1; i <= n; ++i) {
		cin >> l[i] >> r[i];
	}
	for (int i = 1; i <= n; ++i) {
		if (r[i] - l[i] + 1 >= m) {
			ll kl = m;
			return cout << kl, 0;
		}
		if (l[i] % m > r[i] % m) {
			v.pb ({l[i] % m, m - 1});
			v.pb ({0, r[i] % m});
		}
		else {
			v.pb ({l[i] % m, r[i] % m});
		}
	}
	sort (v.begin(), v.end());
//	for (auto i : v) {
//		cout << i.ff << " " << i.ss << "\n";
//	}
//	return 0;
	ll l1 = 0, r1 = 0, jogap = 0;
	for (int i = 0; i < (int)v.sz; ++i) {
		if (v[i].ff <= r1) r1 = max (r1, v[i].ss);
		
		else {
			jogap += r1 - l1 + 1;
			l1 = v[i].ff; 
			r1 = v[i].ss;
		}
	}
	jogap += r1 - l1 + 1;
	cout << jogap;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:17:7: warning: unused variable 'tr' [-Wunused-variable]
   17 |  bool tr = 0;
      |       ^~

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