結果
問題 |
No.2477 Drifting
|
ユーザー |
![]() |
提出日時 | 2024-06-21 15:41:07 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 1,910 bytes |
コンパイル時間 | 1,024 ms |
コンパイル使用メモリ | 84,348 KB |
最終ジャッジ日時 | 2025-02-21 23:41:07 |
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | -- * 3 |
other | AC * 6 TLE * 1 -- * 7 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:45:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 45 | scanf("%d%d", &n, &m); | ~~~~~^~~~~~~~~~~~~~~~ main.cpp:49:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 49 | scanf("%d%d%d", &u, &v, &w); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:55:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 55 | scanf("%d", &k); | ~~~~~^~~~~~~~~~ main.cpp:59:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 59 | scanf("%d%d%d", &a, &b, &c); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~
ソースコード
/* -*- coding: utf-8 -*- * * 2477.cc: No.2477 Drifting - yukicoder */ #include<cstdio> #include<vector> #include<unordered_map> #include<unordered_set> #include<algorithm> #include<utility> using namespace std; /* constant */ const int MAX_N = 200000; const int MAX_M = 200000; const int MAX_GN = MAX_N + MAX_M; const long long LINF = 1LL << 62; /* typedef */ using ll = long long; using vl = vector<ll>; using pii = pair<int,int>; using vpii = vector<pii>; using usi = unordered_set<int>; using vusi = vector<usi>; using umii = unordered_map<int,int>; /* global variables */ vpii nbrs[MAX_N]; umii exis[MAX_N]; vusi excs[MAX_N]; vl dp[MAX_N]; /* subroutines */ /* main */ int main() { int n, m; scanf("%d%d", &n, &m); for (int i = 0; i < m; i++) { int u, v, w; scanf("%d%d%d", &u, &v, &w); u--, v--; nbrs[u].push_back({v, w}); } int k; scanf("%d", &k); for (int i = 0; i < k; i++) { int a, b, c; scanf("%d%d%d", &a, &b, &c); a--, b--, c--; auto mit = exis[b].find(a); int j = 0; if (mit != exis[b].end()) j = mit->second; else j = exis[b][a] = exis[b].size(); if (j < excs[b].size()) excs[b][j].insert(c); else { usi cs; cs.insert(c); excs[b].push_back(cs); } } for (int u = 0; u < n; u++) { excs[u].push_back(usi()); dp[u].assign((int)excs[u].size(), LINF); } dp[0][0] = 0; for (int u = 0; u < n; u++) for (int i = 0; i < excs[u].size(); i++) if (dp[u][i] < LINF) { for (auto [v, w]: nbrs[u]) { if (! excs[u][i].empty() && excs[u][i].find(v) != excs[u][i].end()) continue; auto mit = exis[v].find(u); int j = (mit != exis[v].end()) ? mit->second : exis[v].size(); dp[v][j] = min(dp[v][j], dp[u][i] + w); } } ll mind = *min_element(dp[n - 1].begin(), dp[n - 1].end()); printf("%lld\n", (mind < LINF) ? mind : -1LL); return 0; }