제출 #723511

#제출 시각아이디문제언어결과실행 시간메모리
723511junseo수열 (APIO14_sequence)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #define fi first #define se second #define eb emplace_back #define ep emplace #define all(v) (v).begin(), (v).end() #define sz(v) (int)v.size() #define rmin(r, x) r = min(r, x) #define rmax(r, x) r = max(r, x) #define ends ' ' #define endl '\n' #define rep(i, s, e) for(int i = (s); i <= (e); ++i) #define rep2(i, e, s) for(int i = (e); i >= (s); --i) #define print(v) copy(all(v), ostream_iterator<int>(cout, " ")), cout << endl #define fastio ios_base::sync_with_stdio(0), cin.tie(0) using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; typedef long double ld; typedef vector<int> vi; // #define LOCAL const ll inf = 1e18; const int maxn = 1e5 + 10; const int maxk = 2e2 + 10; const ll minx = 0, maxx = 1e9; int N, K; ll S[maxn]; ll D[2][maxn]; int P[maxk][maxn]; struct Line { ll a, b; int prv; Line(ll a=0, ll b=-inf, int prv=-1) : a(a), b(b), prv(prv) {} ll calc(ll x) { return a * x + b; } }; struct Node { Line f; int l, r; Node() : l(0), r(r) {} }; struct Lichao { vector<Node> tr; int C; void init() { C = 1; tr.clear(); tr.resize(maxn); fill(all(tr), Line()); } void update(Line g, int nd=1, ll st=minx, ll ed=maxx) { while(true) { Line& f = tr[nd].f; ll mid = st+ed >> 1; if(f.calc(mid) < g.calc(mid)) swap(f, g); if(f.calc(st) < g.calc(st)) { ed = mid-1; nd = tr[nd].l = (tr[nd].l ?: ++C); } else if(f.calc(ed) < g.calc(ed)) { st = mid+1; nd = tr[nd].r = (tr[nd].r ?: ++C); } else break; } } pll query(ll x, int nd=1, ll st=minx, ll ed=maxx) { pll ret = {-inf, -1}; while(nd) { ll mid = st+ed >> 1; rmax(ret, pll(tr[nd].f.calc(x), tr[nd].f.prv)); if(x <= mid) { ed = mid-1; nd = tr[nd].l; } else { st = mid+1; nd = tr[nd].r; } } return ret; } } T; int main() { #ifdef LOCAL freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); #endif fastio; cin >> N >> K; rep(i, 1, N) { int x; cin >> x; S[i] = S[i-1] + x; } rep(i, 1, N) P[0][i] = i; rep(k, 1, K) { T.init(); int t = k & 1, _t = !t; rep(i, 1, N) { auto [d, p] = T.query(S[i]); D[t][i] = d; P[k][i] = p; T.update(Line(S[i], D[_t][i] - S[i]*S[i], i)); } } vector<int> ans; int idx = N; rep2(k, K, 1) { idx = P[k][idx]; ans.eb(idx); } reverse(all(ans)); cout << D[K&1][N] << endl; for(auto& i : ans) cout << i << ends; return 0; }

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp: In constructor 'Node::Node()':
sequence.cpp:45:2: warning: 'Node::r' is initialized with itself [-Winit-self]
   45 |  Node() : l(0), r(r) {}
      |  ^~~~
sequence.cpp: In member function 'void Lichao::update(Line, int, ll, ll)':
sequence.cpp:59:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   59 |    ll mid = st+ed >> 1;
      |             ~~^~~
sequence.cpp: In member function 'pll Lichao::query(ll, int, ll, ll)':
sequence.cpp:75:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   75 |    ll mid = st+ed >> 1;
      |             ~~^~~
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from sequence.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h: In instantiation of 'typename __gnu_cxx::__enable_if<(! std::__is_scalar<_Tp>::__value), void>::__type std::__fill_a1(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = Node*; _Tp = Line; typename __gnu_cxx::__enable_if<(! std::__is_scalar<_Tp>::__value), void>::__type = void]':
/usr/include/c++/10/bits/stl_algobase.h:902:21:   required from 'void std::__fill_a1(__gnu_cxx::__normal_iterator<_Iterator, _Container>, __gnu_cxx::__normal_iterator<_Iterator, _Container>, const _Tp&) [with _Ite = Node*; _Cont = std::vector<Node>; _Tp = Line]'
/usr/include/c++/10/bits/stl_algobase.h:914:21:   required from 'void std::__fill_a(_FIte, _FIte, const _Tp&) [with _FIte = __gnu_cxx::__normal_iterator<Node*, std::vector<Node> >; _Tp = Line]'
/usr/include/c++/10/bits/stl_algobase.h:944:20:   required from 'void std::fill(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = __gnu_cxx::__normal_iterator<Node*, std::vector<Node> >; _Tp = Line]'
sequence.cpp:54:23:   required from here
/usr/include/c++/10/bits/stl_algobase.h:861:11: error: no match for 'operator=' (operand types are 'Node' and 'const Line')
  861 |  *__first = __value;
      |  ~~~~~~~~~^~~~~~~~~
sequence.cpp:42:8: note: candidate: 'constexpr Node& Node::operator=(const Node&)'
   42 | struct Node {
      |        ^~~~
sequence.cpp:42:8: note:   no known conversion for argument 1 from 'const Line' to 'const Node&'
sequence.cpp:42:8: note: candidate: 'constexpr Node& Node::operator=(Node&&)'
sequence.cpp:42:8: note:   no known conversion for argument 1 from 'const Line' to 'Node&&'