Submission #673820

#	Time	Username	Problem	Language	Result	Execution time	Memory
673820		QwertyPi	Strange Device (APIO19_strange_device)	C++14	100 / 100	1671 ms	100376 KiB

strange_device

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

ostream& operator<<(ostream& out, __int128_t x){
	string s; while(x) s.push_back(x % 10 + '0'), x /= 10;
	reverse(s.begin(), s.end()); return out << s;
}

int32_t main(){
	int n, a, b; cin >> n >> a >> b;
  	__int128_t c = (__int128_t) b * (a / __gcd(a, b + 1));
  	vector<pair<__int128_t, __int128_t>> d;
  	for(int i = 0; i < n; i++){
      	int l, r; cin >> l >> r;
      	if(r - l + 1 >= c){
        	cout << c << endl;
          	return 0;
        }
      	if(l / c == r / c){
			d.push_back({l % c, 1});
			d.push_back({r % c + 1, -1});
        }else{
			d.push_back({l % c, 1});
			d.push_back({0, 1});
			d.push_back({r % c + 1, -1});
		}
    }
	d.push_back({c, 0});
	sort(d.begin(), d.end());
	int cnt = 0, ans = 0;
	for(int i = 0; i < d.size() - 1; i++){
		cnt += d[i].second;
		if(cnt > 0){
			ans += d[i + 1].first - d[i].first;
		}
	}
	cout << ans << endl;
}

Compilation message (stderr)

strange_device.cpp: In function 'int32_t main()':
strange_device.cpp:32:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<__int128, __int128> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for(int i = 0; i < d.size() - 1; i++){
      |                 ~~^~~~~~~~~~~~~~

• 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