結果
問題 | No.168 ものさし |
ユーザー |
|
提出日時 | 2020-07-16 02:53:41 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 59 ms / 2,000 ms |
コード長 | 2,089 bytes |
コンパイル時間 | 1,859 ms |
コンパイル使用メモリ | 130,260 KB |
最終ジャッジ日時 | 2025-01-11 21:22:14 |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 19 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:81:17: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 81 | int n; scanf("%d", &n); | ~~~~~^~~~~~~~~~ main.cpp:82:61: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 82 | vector<ll> x(n), y(n); for (int i = 0; i < n; i++) scanf("%lld %lld", &x[i], &y[i]); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
#include <cstdio>#include <iostream>#include <string>#include <sstream>#include <stack>#include <algorithm>#include <cmath>#include <queue>#include <map>#include <set>#include <cstdlib>#include <bitset>#include <tuple>#include <assert.h>#include <deque>#include <bitset>#include <iomanip>#include <limits>#include <chrono>#include <random>#include <array>#include <unordered_map>#include <functional>#include <complex>#include <numeric>template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }//constexpr long long MAX = 5100000;constexpr long long INF = 1LL << 60;constexpr int inf = 1000000007;constexpr long long mod = 1000000007LL;//constexpr long long mod = 998244353LL;const long double PI = acos((long double)(-1));using namespace std;typedef unsigned long long ull;typedef long long ll;typedef long double ld;class UnionFind {public:vector<int> Parent;UnionFind(int N) {Parent = vector<int>(N, -1);}int root(int A) {if (Parent[A] < 0) {return A;}return Parent[A] = root(Parent[A]);}long long size(int A) {return -(long long)Parent[root(A)];}bool connect(int A, int B) {A = root(A);B = root(B);if (A == B) {return false;}if (size(A) < size(B)) {swap(A, B);}Parent[A] += Parent[B];Parent[B] = A;return true;}};int main(){/*cin.tie(nullptr);ios::sync_with_stdio(false);*/int n; scanf("%d", &n);vector<ll> x(n), y(n); for (int i = 0; i < n; i++) scanf("%lld %lld", &x[i], &y[i]);ll lf = 0;ll rg = inf / 10 * 3;while (rg - lf > 1) {ll mid = (lf + rg) >> 1;ll l2 = mid * mid * 100;UnionFind uni(n);for (int i = 0; i < n; i++) {for (int j = i + 1; j < n; j++) {ll d = (x[j] - x[i]) * (x[j] - x[i]) + (y[j] - y[i]) * (y[j] - y[i]);if (d <= l2) uni.connect(i, j);}}if (uni.root(0) == uni.root(n-1)) rg = mid;else lf = mid;}cout << rg * 10 << endl;return 0;}