結果
問題 | No.1265 Balloon Survival |
ユーザー |
|
提出日時 | 2020-10-23 22:14:21 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 61 ms / 2,000 ms |
コード長 | 3,625 bytes |
コンパイル時間 | 2,188 ms |
コンパイル使用メモリ | 205,044 KB |
最終ジャッジ日時 | 2025-01-15 13:13:42 |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 32 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define rep(i, n) for(int i = 0; i < n; i++)#define rep2(i, x, n) for(int i = x; i <= n; i++)#define rep3(i, x, n) for(int i = x; i >= n; i--)#define each(e, v) for(auto &e: v)#define pb push_back#define eb emplace_back#define all(x) x.begin(), x.end()#define rall(x) x.rbegin(), x.rend()#define sz(x) (int)x.size()using ll = long long;using pii = pair<int, int>;using pil = pair<int, ll>;using pli = pair<ll, int>;using pll = pair<ll, ll>;const int inf = (1<<30)-1;const ll INF = (1LL<<60)-1;const double pi = acos(-1.0);const double EPS = 1e-10;template<typename T> bool chmax(T &x, const T &y){if(x < y) {x = y; return true;}return false;}template<typename T> bool chmin(T &x, const T &y){if(x > y) {x = y; return true;}return false;}template<typename T> void in(T &x){cin >> x;}template<typename T> void out(T x){cout << x << '\n';}template<typename T> void out2(T x){cout << x << ' ';}template<typename T, typename U> void in(pair<T, U> &p){cin >> p.first >> p.second;}template<typename T, typename U> void out(pair<T, U> p){cout << p.first << ' ' << p.second << '\n';}using vi = vector<int>;using vll = vector<ll>;#define vec(type, name, a, x) vector<type> name(a, x)#define VEC(type, a, x) vector<type>(a, x)#define vec2(type, name, a, b, x) vector<vector<type>> name(a, VEC(type, b, x))#define VEC2(type, a, b, x) vector<vector<type>>(a, VEC(type, b, x))#define vec3(type, name, a, b, c, x) vector<vector<vector<type>>> name(a, VEC2(type, b, c, x))#define VEC3(type, a, b, c, x) vector<vector<vector<type>>>(a, VEC2(type, b, c, x))#define vec4(type, name, a, b, c, d, x) vector<vector<vector<vector<type>>>> name(a, VEC3(type, b, c, d, x))#define VEC4(type, a, b, c, d, x) vector<vector<vector<vector<type>>>>(a, VEC3(type, b, c, d, x))#define vec5(type, name, a, b, c, d, e, x) vector<vector<vector<vector<vector<type>>>>> name(a, VEC4(type, b, c, d, e, x))#define VEC5(type, a, b, c, d, e, x) vector<vector<vector<vector<vector<type>>>>>(a, VEC4(type, b, c, d, e, x))template<typename T> void in(vector<T> &a){rep(i, sz(a)) cin >> a[i];}template<typename T> void out(const vector<T> &a){for(auto &e: a) cout << e << '\n';}template<typename T> void out2(const vector<T> &a){for(auto &e: a) cout << e << ' '; cout << '\n';}template<typename T> void unique(vector<T> &a){sort(all(a)), a.erase(unique(all(a)), a.end());}vector<int> iota(int n){vector<int> ret(n);iota(all(ret), 0);return ret;}template<typename T> vector<int> iota(const vector<T> &a, bool greater = false){vector<int> ret = iota(sz(a));sort(all(ret), [&](int i, int j){return (a[i] < a[j])^greater;});return ret;}struct io_setup{io_setup(){ios_base::sync_with_stdio(false);cin.tie(NULL);cout << fixed << setprecision(15);}} io_setup;const int MOD = 1000000007;//const int MOD = 998244353;struct Data{int i, j; ll t;Data(int i, int j, ll t) : i(i), j(j), t(t) {}};int main(){int N;in(N);vll x(N), y(N);rep(i, N) in(x[i]), in(y[i]);vector<Data> v;rep(i, N){rep(j, i){v.eb(j, i, (x[i]-x[j])*(x[i]-x[j])+(y[i]-y[j])*(y[i]-y[j]));}}sort(all(v), [](Data a, Data b){return a.t < b.t;});vector<bool> used(N, false);int ans = 0;each(e, v){if(used[e.i] || used[e.j]) continue;if(e.i == 0) ans++, used[e.j] = true;else used[e.i] = used[e.j] = true;}out(ans);}