제출 #911117

#제출 시각아이디문제언어결과실행 시간메모리
911117NoLoveCommuter Pass (JOI18_commuter_pass)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> typedef long long ll; using namespace std; vector<pair<ll, ll>> graph[100001]; ll du[100001], dv[100001], ds[100001], dp[2][100001], ans; bool visited[100001]; void dijkstra1(ll start, ll arr[]) { fill(visited, visited + 100001, false); priority_queue<pair<ll, ll>> pq; pq.push({0, start}); while (!pq.empty()) { ll c, node; tie(c, node) = pq.top(); pq.pop(); if (!visited[node]) { arr[node] = -c; visited[node] = true; for (auto &i : graph[node]) pq.push({c - i.second, i.first}); } } } void dijkstra2(ll start, ll end) { fill(dp[0], dp[0] + 100001, LLONG_MAX / 2); fill(dp[1], dp[1] + 100001, LLONG_MAX / 2); fill(visited, visited + 100001, false); priority_queue<pair<ll, pair<ll, ll>>> pq; pq.push({0, {start, 0}}); dp[0][0] = dp[1][0] = LLONG_MAX / 2; db(start, end) while (!pq.empty()) { ll c, node, par; pair<ll, ll> p; auto x = pq.top(); tie(c, p) = pq.top(); tie(node, par) = p; pq.pop(); if (!visited[node]) { visited[node] = true; ds[node] = -c; dp[0][node] = min(du[node], dp[0][par]); dp[1][node] = min(dv[node], dp[1][par]); db(x, dp[0][node], dp[1][node]) for (auto i : graph[node]) pq.push({c - i.second, {i.first, node}}); } else if (-c == ds[node]) { // if (min(du[node], dp[0][par]) + min(dv[node], dp[1][par]) <= // dp[0][node] + dp[1][node]) { dp[0][node] = min(du[node], dp[0][par]); dp[1][node] = min(dv[node], dp[1][par]); // } } } db(dp[0][end], dp[1][end]) ans = min(ans, dp[0][end] + dp[1][end]); } int main() { if (fopen("hi.inp", "r")) { freopen("hi.inp", "r", stdin); // freopen("hi.out", "w", stdout); } iostream::sync_with_stdio(false); cin.tie(0); ll n, m, s, t, u, v; cin >> n >> m >> s >> t >> u >> v; for (int i = 0; i < m; i++) { ll a, b, c; cin >> a >> b >> c; graph[a].push_back({b, c}); graph[b].push_back({a, c}); } dijkstra1(u, du); dijkstra1(v, dv); ans = du[v]; dijkstra2(s, t); // dijkstra2(t, s); cout << ans << '\n'; return 0; }

컴파일 시 표준 에러 (stderr) 메시지

commuter_pass.cpp: In function 'void dijkstra2(ll, ll)':
commuter_pass.cpp:35:2: error: 'db' was not declared in this scope; did you mean 'dp'?
   35 |  db(start, end)
      |  ^~
      |  dp
commuter_pass.cpp: In function 'int main()':
commuter_pass.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("hi.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~