제출 #756087

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
756087		SanguineChameleon	Sails (IOI07_sails)	C++17	40 / 100	1082 ms	1268 KiB

sails

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

void just_do_it();

int main() {
	#ifdef KAMIRULEZ
		freopen("kamirulez.inp", "r", stdin);
		freopen("kamirulez.out", "w", stdout);
	#endif
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	just_do_it();
	return 0;
}

const int maxn = 1e5 + 20;
pair<int, int> a[maxn];
int cnt[maxn];

void just_do_it() {
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i].first >> a[i].second;
	}
	sort(a + 1, a + n + 1);
	for (int i = 1; i <= n; i++) {
		sort(cnt + 1, cnt + a[i].first + 1, greater<int>());
		for (int j = a[i].first - a[i].second + 1; j <= a[i].first; j++) {
			cnt[j]++;
		}
	}
	long long res = 0;
	for (int i = 1; i <= a[n].first; i++) {
		res += 1LL * cnt[i] * (cnt[i] - 1) / 2;
	}
	cout << res;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10