Submission #200821

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
200821	2020-02-08 09:09:04	maruii	Long Distance Coach (JOI17_coach)	C++14	16 / 100	75 ms	117880 KiB

coach

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<ll, ll>;
#define ff first
#define ss second
int N, M;
struct CHT {
  struct Node {
    pii L;
    int l, r;
    Node() : L(pii(0, 1e18)), l(-1), r(-1) {}
  } A[5000005];
  ll f(pii L, int x) { return L.ff * x + L.ss; }
  int cnt;
  void update(int nn, int s, int e, pii L2) {
    pii &L1 = A[nn].L;
    if (f(L1, s) > f(L2, s)) swap(L1, L2);
    if (f(L1, e) <= f(L2, e)) return;
    int m = s + e >> 1;
    if (f(L1, m) > f(L2, m)) {
      if (A[nn].l < 0) A[nn].l = ++cnt;
      update(A[nn].l, s, m, L2);
    }
    else {
      if (A[nn].r < 0) A[nn].r = ++cnt;
      update(A[nn].r, m + 1, e, L2);
    }
  }
 
 
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Compilation message (stderr)

coach.cpp: In member function 'void CHT::update(int, int, int, pii)':
coach.cpp:21:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = s + e >> 1;
           ~~^~~
coach.cpp: In member function 'll CHT::query(int, int, int, int)':
coach.cpp:35:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = s + e >> 1;
           ~~^~~

• Subtask 1: 16 / 16
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 29