제출 #744541

#제출 시각아이디문제언어결과실행 시간메모리
744541RushB도로 폐쇄 (APIO21_roads)C++17
31 / 100
2073 ms32552 KiB
#include "roads.h" #include <bits/stdc++.h> using namespace std; const int N = 1e5 + 5; long long dp[N][2]; int X, dpr[N], p[N]; vector<array<int, 2>> adj[N]; vector<int> rec; set<int> S; bitset<N> enb, mark; int gpr(int x) { return dpr[x] == x ? x : dpr[x] = gpr(dpr[x]); } void merge(int u, int v) { dpr[gpr(u)] = gpr(v); } void dfs(int v, int p) { if (enb[v]) return void(dp[v][0] = dp[v][1] = 0); rec.push_back(v); mark[v] = true; long long dif = 0, ans = 0, mx = 0; vector<long long> V; V.reserve(adj[v].size()); for (auto P: adj[v]) { int u = P[0], w = P[1]; if (u == p) continue; dfs(u, v); dif += dp[u][0]; V.push_back(w + dp[u][1] - dp[u][0]); } sort(V.rbegin(), V.rend()); for (int i = 0; i <= X && i <= V.size(); i++) { if (i) ans += V[i - 1]; mx = max(mx, ans); if (i + 1 == X) dp[v][1] = mx + dif; } if (V.size() + 1 < X) dp[v][1] = mx + dif; dp[v][0] = mx + dif; } vector<long long> minimum_closure_costs(int n, vector<int> U, vector<int> V, vector<int> W) { iota(dpr, dpr + N, 0); long long all = 0; for (int i = 0; i < U.size(); i++) { adj[U[i]].push_back({V[i], W[i]}); adj[V[i]].push_back({U[i], W[i]}); all += W[i]; } iota(p, p + n, 0), sort(p, p + n, [&](const int x, const int y) {return adj[x].size() < adj[y].size();}); for (int i = 0; i < n; i++) S.insert(i); vector<long long> re(n); re[0] = all; for (int i = 1, ptr = 0; i < n; i++) { X = i; for (;ptr < n && adj[p[ptr]].size() <= i; ptr++) { int v = p[ptr]; for (auto P: adj[v]) if (enb[P[0]]) all -= P[1]; enb[v] = true; S.erase(v); } long long ans = 0; for (auto v: S) if (!mark[v]) { dfs(v, v); ans += dp[v][0]; } for (auto v: rec) mark[v] = 0; rec.clear(); re[i] = all - ans; } return re; }

컴파일 시 표준 에러 (stderr) 메시지

roads.cpp: In function 'void dfs(int, int)':
roads.cpp:37:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for (int i = 0; i <= X && i <= V.size(); i++) {
      |                            ~~^~~~~~~~~~~
roads.cpp:42:19: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |  if (V.size() + 1 < X) dp[v][1] = mx + dif;
      |      ~~~~~~~~~~~~~^~~
roads.cpp: In function 'std::vector<long long int> minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)':
roads.cpp:49:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |  for (int i = 0; i < U.size(); i++) {
      |                  ~~^~~~~~~~~~
roads.cpp:61:39: warning: comparison of integer expressions of different signedness: 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   61 |   for (;ptr < n && adj[p[ptr]].size() <= i; ptr++) {
      |                    ~~~~~~~~~~~~~~~~~~~^~~~
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...