Submission #36042

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
36042	2017-12-04 14:41:04	cheater2k	Bulldozer (JOI17_bulldozer)	C++14	100 / 100	1074 ms	32536 KiB

bulldozer

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#include <bits/stdc++.h>
using namespace std;
const int N = 2005;
const long long inf = 1e18;
struct SegmentTree {
  struct Node {
    long long val; long long pre; long long suf; long long sum;
    Node() { val = -inf; sum = pre = suf = 0; }
  } it[N << 2];
  #define mid ((l + r) >> 1)
  Node merge(Node le, Node ri) {
    Node cur = Node();
    cur.sum = le.sum + ri.sum;
    cur.val = max({le.val, ri.val, le.suf + ri.pre});
    cur.pre = max(le.pre, le.sum + ri.pre);
    cur.suf = max(ri.suf, ri.sum + le.suf);
    return cur;
  }
  void upd(int v, int l, int r, int pos, int val) {
    if (l > r || l > pos || r < pos) return;
    if (l == r) { it[v].val = it[v].pre = it[v].suf = it[v].sum = val; return; }
    upd(v << 1, l, mid, pos, val); upd(v << 1 | 1, mid + 1, r, pos, val);
    it[v] = merge(it[v << 1], it[v << 1 | 1]);
  }
  long long get() { return it[1].val; }
  #undef mid
} seg;
 
 
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Compilation message (stderr)

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:74:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < vec.size(); ++i) {
                  ~~^~~~~~~~~~~~
bulldozer.cpp:77:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(i + 1 < vec.size() && cmp(vec[i], vec[i+1]) == 0) {
         ~~~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 20 / 20
• Subtask 3: 35 / 35
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20