結果
問題 | No.2179 Planet Traveler |
ユーザー |
|
提出日時 | 2023-01-06 22:30:21 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 10 ms / 3,000 ms |
コード長 | 1,810 bytes |
コンパイル時間 | 1,826 ms |
コンパイル使用メモリ | 203,912 KB |
最終ジャッジ日時 | 2025-02-10 00:09:21 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 26 |
ソースコード
#include <bits/stdc++.h>#include <variant>#define rep2(i, k, n) for (i64 i = (i64)(k); i < (i64)(n); i++)#define rep(i, n) rep2(i, 0, n)#define all(x) begin(x), end(x)#ifdef ENV_LOCAL#define dump \if (1) cerr#else#define dump \if (0) cerr#endifusing namespace std;using namespace std::string_literals;using i32 = int32_t;using i64 = int64_t;using f64 = double;using f80 = long double;using vi32 = vector<i32>;using vi64 = vector<i64>;// using namespace harudake;int main() {ios::sync_with_stdio(false);cin.tie(nullptr);i64 n;cin >> n;vector<tuple<i64, i64, i64>> vp;rep(i, n) {i64 x, y, t;cin >> x >> y >> t;vp.emplace_back(x, y, t);}vector<bool> vis(n, false);i64 INF = 1e18;vi64 mins(n, INF);mins[0] = 0;rep(i, n) {i64 idx = -1;i64 mn = INF;rep(j, n) {if (vis[j]) continue;if (mins[j] < mn) {mn = mins[j];idx = j;}}vis[idx] = true;auto [x, y, t] = vp[idx];rep(j, n) {auto d = [&] {auto [xj, yj, tj] = vp[j];if (t != tj) {i64 rsq1 = x * x + y * y;i64 rsq2 = xj * xj + yj * yj;i64 val = floor(rsq1 + rsq2 - 2 * sqrt(rsq1) * sqrt(rsq2));i64 th = (rsq1 - rsq2) * (rsq1 - rsq2) + val * val -2 * (rsq1 + rsq2) * val;while (th > 0) {++val;th = (rsq1 - rsq2) * (rsq1 - rsq2) + val * val -2 * (rsq1 + rsq2) * val;}return val;} else {i64 xd = x - xj;i64 yd = y - yj;return xd * xd + yd * yd;}}();if (mins[j] > max(mins[idx], d)) {mins[j] = max(mins[idx], d);}}}cout << mins.back() << endl;return 0;}