結果
問題 | No.168 ものさし |
ユーザー |
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提出日時 | 2015-03-20 00:01:29 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 79 ms / 2,000 ms |
コード長 | 2,125 bytes |
コンパイル時間 | 854 ms |
コンパイル使用メモリ | 81,992 KB |
実行使用メモリ | 11,616 KB |
最終ジャッジ日時 | 2024-12-24 06:56:19 |
合計ジャッジ時間 | 2,153 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 19 |
ソースコード
#include <sstream>#include <string>#include <vector>#include <map>#include <algorithm>#include <iostream>#include <utility>#include <set>#include <cctype>#include <queue>#include <stack>#include <cstdio>#include <cstdlib>#include <cmath>using namespace std;typedef long long ll;const int MAXN = 1024;ll X[MAXN], Y[MAXN];const ll INF = 1ll<<63;ll square(ll x) {return x*x;}ll lsqrt(ll n) {ll low = 0, high = 1ll<<31;while (high - low > 1) {ll med = (high + low) / 2;if (med * med <= n) low = med;else high = med;}return low;}// unionFindconst int UNION_MAX = 1024;class unionFind {int par[UNION_MAX];int Rank[UNION_MAX];public:void init(int nn) {for (int i = 0; i <= nn; i++) {par[i] = i;Rank[i] = 0;}}int find(int x) {if (x == par[x]) return x;return par[x] = find(par[x]);}void unite(int x, int y) {x = find(x); y = find(y);if (x == y) return;if (Rank[x] < Rank[y]) {par[x] = y;} else {par[y] = x;if (Rank[x] == Rank[y]) Rank[x]++;}}bool same(int x, int y) {return find(x) == find(y);}};unionFind uf;int main(void) {int N;cin >> N;for (int i = 0; i < N; i++) {cin >> X[i] >> Y[i];}priority_queue<pair<ll, pair<int, int> > > que;for (int i = 0; i < N; i++) {for (int j = i+1; j < N; j++) {ll dist = lsqrt(square(X[i]-X[j]) + square(Y[i]-Y[j]));if (dist*dist < square(X[i]-X[j]) + square(Y[i]-Y[j])) {dist++;}if (dist % 10 == 0) que.push(make_pair(-dist/10*10, make_pair(i, j)));else que.push(make_pair(-(dist/10+1)*10, make_pair(i, j)));}}uf.init(N);ll ret = 10;while (1) {if (uf.same(0, N-1)) break;auto now = que.top(); que.pop();ret = -now.first;uf.unite(now.second.first, now.second.second);}cout << ret << endl;return 0;}