제출 #521974

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
521974		emanuelsilva	Pairs (IOI07_pairs)	C++17	60 / 100	134 ms	10000 KiB

pairs

#include <bits/stdc++.h>

using namespace std;

#define _ ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'

typedef long long ll;

const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3fll;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class T> 
	using ord_set = tree<T, null_type, less<T>, rb_tree_tag,
	tree_order_statistics_node_update>;

const int MAX = 80;

void solve1(int n, int d, int m) {
	vector<pair<int, int>> ev;
	for (int i = 0; i<n; i++) {
		int x; cin >> x;
		ev.emplace_back(x, 0);
		ev.emplace_back(x+d, 1);
	}
	sort(ev.begin(), ev.end());

	int cnt = 0;
	ll ans = 0;
	for (auto [x, ty] : ev) {
		if (ty == 0) ans += cnt, cnt++;
		else cnt--;
	}
	cout << ans << endl;
}

void solve2(int n, int d, int m) {
	vector<tuple<int, int, int, int>> ev;
	for (int i = 0; i<n; i++) {
		int x, y; cin >> x >> y;
		int nx = x + y;
		y = x - y;
		x = nx;

		ev.emplace_back(x, 0, y, i);
		ev.emplace_back(x+d, 1, y, i);
	}
	sort(ev.begin(), ev.end());
	ord_set<pair<int, int>> st;
	ll ans = 0;
	for (auto [x, ty, y, i] : ev) {
		if (ty == 0) {
			ans += st.order_of_key({y+d, INF}) - st.order_of_key({y-d, -INF});
			st.insert({y, i});
		}
		else st.erase({y, i});
	}
	cout << ans << endl;
}

void solve3(int n, int d, int m) {
	
}

int main() { _
	int b, n, d, m; cin >> b >> n >> d >> m;
	if (b == 1) solve1(n, d, m);
	if (b == 2) solve2(n, d, m);
	if (b == 3) solve3(n, d, m);


	exit(0);
}

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