제출 #559130

#제출 시각아이디문제언어결과실행 시간메모리
559130acm도로 폐쇄 (APIO21_roads)C++14
31 / 100
2082 ms24192 KiB
#include <bits/stdc++.h> #define FOR(i, l, r) for (int i = (l); i <= (r); ++i) #define REP(i, l, r) for (int i = (l); i < (r); ++i) #define FORD(i, r, l) for (int i = (r); i >= (l); --i) #define REPD(i, r, l) for (int i = (r)-1; i >= (l); --i) #define ll long long #define pii pair<int, int> using namespace std; const int N = 1e5 + 5, Ns4 = 200005; int n; long long ans[N]; long long dpx[N], val[N]; int sz[Ns4]; long long dd[Ns4][2]; vector<pii> S[N]; void DFS(int u, int p, int max_sz) { int now_sz = min(sz[u], max_sz); vector<int> Q; long long sum = 0, pre_sum = 0; for (auto [c, v] : S[u]) if (v != p) { DFS(v, u, max_sz); long long xx = dd[v][1] + c; long long yy = dd[v][0]; sum += xx; Q.push_back(yy - xx); } sort(Q.begin(), Q.end()); pre_sum = 1e15; REP(i, 0, now_sz) { pre_sum = sum; sum += min(0, Q[i]); } if (now_sz < max_sz) pre_sum = sum; dd[u][0] = pre_sum; dd[u][1] = sum; } void calc(int i) { DFS(0, 0, i); ans[i] = dd[0][1]; } void dnc(int l = 1, int r = n - 2, ll L = ans[n - 1], ll R = ans[0]) { if (l > r) return; if (L == R) { for (int i = l; i <= r; i++) ans[i] = L; return; } int tm = (l + r) / 2; calc(tm); dnc(l, tm - 1, ans[tm], R); dnc(tm + 1, r, L, ans[tm]); } void sub34() { REP(i, 0, n) { sz[i] = S[i].size() - 1; if (i == 0) ++sz[i]; } calc(0); calc(n - 1); if (1 <= n - 2) dnc(); } vector<long long> minimum_closure_costs(int N, vector<int> U, vector<int> V, vector<int> W) { n = N; REP(i, 0, n - 1) { S[U[i]].emplace_back(W[i], V[i]); S[V[i]].emplace_back(W[i], U[i]); } sub34(); vector<long long> ret(n); REP(i, 0, n) ret[i] = ans[i]; return ret; }

컴파일 시 표준 에러 (stderr) 메시지

roads.cpp: In function 'void DFS(int, int, int)':
roads.cpp:21:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   21 |   for (auto [c, v] : S[u])
      |             ^
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