結果
問題 | No.1265 Balloon Survival |
ユーザー |
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提出日時 | 2020-10-23 23:13:24 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 71 ms / 2,000 ms |
コード長 | 2,272 bytes |
コンパイル時間 | 1,554 ms |
コンパイル使用メモリ | 134,408 KB |
最終ジャッジ日時 | 2025-01-15 13:58:51 |
ジャッジサーバーID (参考情報) |
judge5 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 32 |
ソースコード
#include <iostream>#include <array>#include <algorithm>#include <vector>#include <bitset>#include <set>#include <unordered_set>#include <cmath>#include <complex>#include <deque>#include <iterator>#include <numeric>#include <map>#include <unordered_map>#include <queue>#include <stack>#include <string>#include <tuple>#include <utility>#include <limits>#include <iomanip>#include <functional>#include <cassert>using namespace std;using ll=long long;template<class T> using V = vector<T>;template<class T, class U> using P = pair<T, U>;using vll = V<ll>;using vvll = V<vll>;#define ALL(v) v.begin(),v.end()template < class T > inline bool chmax(T& a, T b) {if (a < b) { a=b; return true; } return false; }template < class T > inline bool chmin(T& a, T b) {if (a > b) { a=b; return true; } return false; }#define DEBUG_VLL(vec) REP(sz, vec.size()) std::cerr<<vec[sz]<<(sz==vec.size()-1?'\n':' ');const long long MOD = 1000000007;const long long HIGHINF = (long long)1e18;const int INF = (int)1e9;using PI = P<ll, ll>;int main() {cin.tie(0);ios::sync_with_stdio(false);int n; cin >> n;V<PI> xy(n);for (int i = 0; i < n; i++) cin >> xy[i].first >> xy[i].second;V< P<ll, PI> > time;for (int i = 0; i < n; i++) {for (int j = i + 1; j < n; j++) {ll t = (xy[i].first - xy[j].first) * (xy[i].first - xy[j].first)+ (xy[i].second - xy[j].second) * (xy[i].second - xy[j].second);time.emplace_back(t, PI(i, j));}}sort(ALL(time));V<bool> broken(n, false);int ans = 0, se0 = 0;ll tmp = 0;set<int> bl;for (P<ll, PI> ttt: time) {if (ttt.first != tmp) {ans += se0;se0 = 0;for (int b: bl) broken[b] = true;bl.clear();}if (ttt.second.first == 0) {if (broken[ttt.second.second]) continue;else se0++, broken[ttt.second.second] = true;} else {if (!broken[ttt.second.first] and !broken[ttt.second.second]) {bl.insert(ttt.second.first), bl.insert(ttt.second.second);}}tmp = ttt.first;}ans += se0;cout << ans << '\n';return 0;}