結果
問題 | No.1607 Kth Maximum Card |
ユーザー | tokusakurai |
提出日時 | 2021-07-16 22:23:49 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 946 ms / 3,500 ms |
コード長 | 3,001 bytes |
コンパイル時間 | 2,503 ms |
コンパイル使用メモリ | 212,532 KB |
実行使用メモリ | 20,044 KB |
最終ジャッジ日時 | 2024-07-06 09:49:17 |
合計ジャッジ時間 | 10,760 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 1 ms
5,376 KB |
testcase_08 | AC | 946 ms
19,968 KB |
testcase_09 | AC | 663 ms
17,016 KB |
testcase_10 | AC | 902 ms
20,044 KB |
testcase_11 | AC | 138 ms
7,168 KB |
testcase_12 | AC | 619 ms
16,444 KB |
testcase_13 | AC | 51 ms
5,760 KB |
testcase_14 | AC | 55 ms
6,528 KB |
testcase_15 | AC | 319 ms
16,124 KB |
testcase_16 | AC | 54 ms
6,016 KB |
testcase_17 | AC | 22 ms
5,376 KB |
testcase_18 | AC | 183 ms
12,416 KB |
testcase_19 | AC | 108 ms
8,960 KB |
testcase_20 | AC | 197 ms
10,496 KB |
testcase_21 | AC | 182 ms
11,264 KB |
testcase_22 | AC | 367 ms
17,920 KB |
testcase_23 | AC | 364 ms
18,004 KB |
testcase_24 | AC | 131 ms
7,936 KB |
testcase_25 | AC | 78 ms
6,400 KB |
testcase_26 | AC | 100 ms
6,912 KB |
testcase_27 | AC | 144 ms
8,192 KB |
testcase_28 | AC | 117 ms
7,168 KB |
testcase_29 | AC | 292 ms
12,160 KB |
testcase_30 | AC | 755 ms
17,720 KB |
testcase_31 | AC | 281 ms
11,136 KB |
testcase_32 | AC | 93 ms
13,824 KB |
testcase_33 | AC | 93 ms
13,568 KB |
testcase_34 | AC | 93 ms
13,568 KB |
testcase_35 | AC | 92 ms
13,696 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for(int i = 0; i < n; i++) #define rep2(i, x, n) for(int i = x; i <= n; i++) #define rep3(i, x, n) for(int i = x; i >= n; i--) #define each(e, v) for(auto &e: v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; const int MOD = 1000000007; //const int MOD = 998244353; const int inf = (1<<30)-1; const ll INF = (1LL<<60)-1; template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;}; template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;}; struct io_setup{ io_setup(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; template<typename T, bool directed = false> struct Weighted_Graph{ struct edge{ int to; T cost; int id; edge(int to, T cost, int id) : to(to), cost(cost), id(id) {} }; vector<vector<edge>> es; const T INF_T; const int n; int m; vector<T> d; vector<int> pre_v; Weighted_Graph(int n) : es(n), INF_T(numeric_limits<T>::max()/2), n(n), m(0), d(n), pre_v(n) {} void add_edge(int from, int to, T cost){ es[from].emplace_back(to, cost, m); if(!directed) es[to].emplace_back(from, cost, m); m++; } T dijkstra(int s, int t = 0){ fill(begin(d), end(d), INF_T); using P = pair<T, int>; priority_queue<P, vector<P>, greater<P> > que; que.emplace(d[s] = 0, s); while(!que.empty()){ auto [p, i] = que.top(); que.pop(); if(p > d[i]) continue; for(auto &e: es[i]){ if(d[i]+e.cost < d[e.to]){ pre_v[e.to] = i, que.emplace(d[e.to] = d[i]+e.cost, e.to); } } } return d[t]; } vector<int> shortest_path(int s, int t){ if(dijkstra(s, t) == INF_T) return {}; vector<int> ret; for(int now = t; now != s; now = pre_v[now]) ret.push_back(now); ret.push_back(s), reverse(begin(ret), end(ret)); return ret; } void clear(){ rep(i, n){ es[i].clear(); } } }; int main(){ int N, M, K; cin >> N >> M >> K; vector<int> u(M), v(M), c(M); rep(i, M){ cin >> u[i] >> v[i] >> c[i]; u[i]--, v[i]--; } int L = 0, R = 200001; Weighted_Graph<int> G(N); while(R-L > 1){ int m = (L+R)/2; rep(i, M){ if(c[i] >= m){ G.add_edge(u[i], v[i], 1); } else{ G.add_edge(u[i], v[i], 0); } } if(G.dijkstra(0, N-1) <= K-1) R = m; else L = m; G.clear(); } cout << L << '\n'; }