結果
問題 | No.2764 Warp Drive Spacecraft |
ユーザー | rniya |
提出日時 | 2024-05-17 22:38:52 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,719 bytes |
コンパイル時間 | 2,888 ms |
コンパイル使用メモリ | 268,720 KB |
実行使用メモリ | 29,860 KB |
最終ジャッジ日時 | 2024-05-17 22:39:02 |
合計ジャッジ時間 | 7,541 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,944 KB |
testcase_03 | WA | - |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | WA | - |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,940 KB |
testcase_08 | AC | 1 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | AC | 1 ms
6,940 KB |
testcase_15 | AC | 1 ms
6,940 KB |
testcase_16 | AC | 113 ms
29,860 KB |
testcase_17 | AC | 110 ms
29,648 KB |
testcase_18 | AC | 113 ms
29,772 KB |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
ソースコード
#include <bits/stdc++.h> #ifdef LOCAL #include <debug.hpp> #else #define debug(...) void(0) #endif template <class T> std::istream& operator>>(std::istream& is, std::vector<T>& v) { for (auto& e : v) { is >> e; } return is; } template <class T> std::ostream& operator<<(std::ostream& os, const std::vector<T>& v) { for (std::string_view sep = ""; const auto& e : v) { os << std::exchange(sep, " ") << e; } return os; } template <class T, class U = T> bool chmin(T& x, U&& y) { return y < x and (x = std::forward<U>(y), true); } template <class T, class U = T> bool chmax(T& x, U&& y) { return x < y and (x = std::forward<U>(y), true); } template <class T> void mkuni(std::vector<T>& v) { std::ranges::sort(v); auto result = std::ranges::unique(v); v.erase(result.begin(), result.end()); } template <class T> int lwb(const std::vector<T>& v, const T& x) { return std::distance(v.begin(), std::ranges::lower_bound(v, x)); } struct Line { mutable long long k, m, p; bool operator<(const Line& o) const { return k < o.k; } bool operator<(long long x) const { return p < x; } }; template <bool isMin = true> struct LineContainer : std::multiset<Line, std::less<>> { // (for doubles, use inf = 1/.0, div(a,b) = a/b) const long long inf = LLONG_MAX / 2; long long div(long long a, long long b) { // floored division return a / b - ((a ^ b) < 0 && a % b); } bool isect(iterator x, iterator y) { if (y == end()) { x->p = inf; return false; } if (x->k == y->k) x->p = x->m > y->m ? inf : -inf; else x->p = div(y->m - x->m, x->k - y->k); return x->p >= y->p; } void add(long long k, long long m) { if (isMin) k = -k, m = -m; auto z = insert({k, m, 0}), y = z++, x = y; while (isect(y, z)) z = erase(z); if (x != begin() && isect(--x, y)) isect(x, y = erase(y)); while ((y = x) != begin() && (--x)->p >= y->p) isect(x, erase(y)); } long long query(long long x) { assert(!empty()); auto l = *lower_bound(x); long long s = 1; if (isMin) s = -1; return s * (l.k * x + l.m); } }; using ll = long long; using namespace std; constexpr ll INF = 4e18; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(15); int N, M; cin >> N >> M; vector<ll> W(N); cin >> W; vector<vector<pair<int, ll>>> G(N), rG(N); for (; M--;) { int U, V; ll T; cin >> U >> V >> T; U--, V--; G[U].emplace_back(V, T); rG[V].emplace_back(U, T); } auto calc = [&](const vector<vector<pair<int, ll>>>& g, int s) { vector<ll> dp(N, INF); priority_queue<pair<ll, int>> pq; dp[s] = 0; pq.emplace(-dp[s], s); while (not pq.empty()) { auto [val, v] = pq.top(); pq.pop(); val *= -1; if (dp[v] != val) continue; for (auto [u, cost] : g[v]) { if (chmin(dp[u], val + cost)) { pq.emplace(-dp[u], u); } } } return dp; }; auto f = calc(G, 0), g = calc(rG, N - 1); ll mini = ranges::min(W), ans = f[N - 1]; ll min_F = INF, min_G = INF; LineContainer lc; for (int i = 0; i < N; i++) { chmin(min_F, f[i] + W[i] * mini); chmin(min_G, g[i] + W[i] * mini); lc.add(W[i], g[i]); } chmin(ans, min_F + min_G); for (int i = 0; i < N; i++) chmin(ans, f[i] + lc.query(W[i])); cout << ans << '\n'; return 0; }