結果

問題 No.2769 Number of Rhombi
ユーザー 👑 binapbinap
提出日時 2024-05-31 22:25:52
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 269 ms / 5,000 ms
コード長 3,024 bytes
コンパイル時間 4,840 ms
コンパイル使用メモリ 274,248 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-05-31 22:26:06
合計ジャッジ時間 13,595 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,812 KB
testcase_01 AC 2 ms
6,816 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 211 ms
6,940 KB
testcase_04 AC 206 ms
6,944 KB
testcase_05 AC 164 ms
6,940 KB
testcase_06 AC 214 ms
6,940 KB
testcase_07 AC 269 ms
6,944 KB
testcase_08 AC 265 ms
6,940 KB
testcase_09 AC 256 ms
6,940 KB
testcase_10 AC 242 ms
6,940 KB
testcase_11 AC 265 ms
6,940 KB
testcase_12 AC 232 ms
6,940 KB
testcase_13 AC 223 ms
6,940 KB
testcase_14 AC 216 ms
6,940 KB
testcase_15 AC 219 ms
6,944 KB
testcase_16 AC 220 ms
6,940 KB
testcase_17 AC 220 ms
6,940 KB
testcase_18 AC 212 ms
6,940 KB
testcase_19 AC 213 ms
6,944 KB
testcase_20 AC 214 ms
6,940 KB
testcase_21 AC 211 ms
6,940 KB
testcase_22 AC 242 ms
6,940 KB
testcase_23 AC 212 ms
6,940 KB
testcase_24 AC 2 ms
6,940 KB
testcase_25 AC 222 ms
6,944 KB
testcase_26 AC 220 ms
6,940 KB
testcase_27 AC 215 ms
6,940 KB
testcase_28 AC 216 ms
6,944 KB
testcase_29 AC 213 ms
6,944 KB
testcase_30 AC 217 ms
6,940 KB
testcase_31 AC 223 ms
6,940 KB
testcase_32 AC 260 ms
6,944 KB
testcase_33 AC 260 ms
6,940 KB
testcase_34 AC 243 ms
6,944 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;

ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}
template<typename T> ostream& operator<<(ostream& os, const set<T>& se){for(T x : se) os << x << " "; os << "\n"; return os;}
template<typename T> ostream& operator<<(ostream& os, const unordered_set<T>& se){for(T x : se) os << x << " "; os << "\n"; return os;}
template<typename S, auto op, auto e> ostream& operator<<(ostream& os, const atcoder::segtree<S, op, e>& seg){int n = seg.max_right(0, [](S){return true;}); rep(i, n) os << seg.get(i) << (i == n - 1 ? "\n" : " "); return os;}
template<typename S, auto op, auto e, typename F, auto mapping, auto composition, auto id> ostream& operator<<(ostream& os, const atcoder::lazy_segtree<S, op, e, F, mapping, composition, id>& seg){int n = seg.max_right(0, [](S){return true;}); rep(i, n) os << seg.get(i) << (i == n - 1 ? "\n" : " "); return os;}

template<typename T> void chmin(T& a, T b){a = min(a, b);}
template<typename T> void chmax(T& a, T b){a = max(a, b);}

int main(){
	int n;
	cin >> n;
	vector<long long> x(n), y(n);
	rep(i, n) cin >> x[i] >> y[i];
	set<pair<int, int>> se;
	rep(i, n){
		se.insert(make_pair(x[i], y[i]));
	}
	auto dist = [&](int i, int j){
		return (x[i] - x[j]) * (x[i] - x[j]) + (y[i] - y[j]) * (y[i] - y[j]);
	};
	int ans = 0;
	rep(i, n){
		map<long long, vector<int>> myMap;
		rep(j, n){
			if(j == i) continue;
			myMap[dist(i, j)].push_back(j);
		}
		for(auto& [tmp, v] : myMap){
			int m = v.size();
			rep(dummy1, m){
				for(int dummy2 = dummy1 + 1; dummy2 < m; dummy2++){
					int j = v[dummy1];
					int k = v[dummy2];
					int x_final = x[k] + (x[j] - x[i]);
					int y_final = y[k] + (y[j] - y[i]);
					if(x_final == x[i] && y_final == y[i]) continue;
					if(se.find(make_pair(x_final, y_final)) != se.end()){
//						cout << i << j << k << "\n";
						ans++;
					}
				}
			}
		}
	}
	cout << ans / 4 << "\n";
	return 0;
}
0