oj.uz

답안 #261512

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
261512 2020-08-11T20:03:34 Z Haunted_Cpp Fuel Station (NOI20_fuelstation) C++17
42 / 100
 521 ms 75604 KB 
/**
 *  author: Haunted_Cpp
**/
 
#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
template<typename T> ostream &operator << (ostream &os, const vector<T> &v) { os << '{'; string sep; for (const auto &x : v) os << sep << x, sep = ", "; return os << '}'; }
template<typename T, size_t size> ostream &operator << (ostream &os, const array<T, size> &arr) { os << '{'; string sep; for (const auto &x : arr) os << sep << x, sep = ", "; return os << '}'; }
template<typename A, typename B> ostream &operator << (ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
 
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << ' ' << H; debug_out(T...); }
 
#ifdef LOCAL
#define debug(...) cerr << "(" << #__VA_ARGS__ << "):", debug_out(__VA_ARGS__)
#else
#define debug(...) 47
#endif

class SegmentTree {
private:
  struct Node {
    long long prefix, sum, best;
    Node () {
      prefix = sum = best = 1e9;
    }
    void merge(Node l, Node r) {
      prefix = min(l.prefix, l.sum + r.prefix);
      sum = l.sum + r.sum;
      best = min({l.best, prefix});
    }
  };
  vector<Node> seg;
  const int LO, HI;
  void build(int l, int r, int node, const vector<int> &arr) {
    if (l == r) {
      seg[node].prefix = seg[node].sum = seg[node].best = arr[l];
      return;
    }
    const int mid = l + (r - l) / 2;
    build(l, mid, 2 * node + 1, arr);
    build(mid + 1, r, 2 * node + 2, arr);
    seg[node].merge(seg[2 * node + 1], seg[2 * node + 2]);
  }
  void modify(int where, int delta, int l, int r, int node) {
    if (l > where || r < where) return;
    if (l >= where && r <= where) {
      seg[node].prefix = seg[node].sum = seg[node].best = delta;
      return;
    }
    const int mid = l + (r - l) / 2;
    modify(where, delta, l, mid, 2 * node + 1);
    modify(where, delta, mid + 1, r, 2 * node + 2);
    seg[node].merge(seg[2 * node + 1], seg[2 * node + 2]);
  }
public:
  SegmentTree(const vector<int> &arr) : LO(0), HI((int)arr.size() - 1) {
    seg.clear();
    seg.resize(4 * (int) arr.size());
    build(LO, HI, 0, arr);
  }
  void modify(int where, int delta) {
    modify(where, delta, LO, HI, 0);
  }
  long long worst_prefix() {
    return seg[0].best;
  } 
};

int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n, d;
  cin >> n >> d;
  vector<tuple<int, int, int>> arr(n);
  vector<pair<int, int>> top_up;
  vector<int> distancias;
  for (int i = 0; i < n; i++) {
    int x, a, b;
    cin >> x >> a >> b;
    arr[i] = make_tuple(x, a, b);
    distancias.emplace_back(b);
  }
  sort(arr.begin(), arr.end());
  for (int i = 0; i < n; i++) top_up.emplace_back(get<2>(arr[i]), i);
  sort(top_up.begin(), top_up.end());
  vector<int> pre = {0};
  vector<int> where_is_it(n);
  long long s = 0;
  for (int i = 0; i < n; i++) {
    int dist = get<0>(arr[i]) - (i - 1 < 0 ? 0 : get<0>(arr[i - 1]));
    s += dist;
    distancias.emplace_back(s);
    distancias.emplace_back(dist);
    pre.emplace_back(-dist);
    where_is_it[i] = pre.size();
    pre.emplace_back(get<1>(arr[i]));
  }
  
  distancias.emplace_back(d - get<0>(arr.back()));
  pre.emplace_back(-d + get<0>(arr.back()));
  distancias.emplace_back(d);
  sort(distancias.begin(), distancias.end());
  distancias.erase(unique(distancias.begin(), distancias.end()), distancias.end());
  SegmentTree seg(pre);
  int rem = 0;
  debug(distancias);
  debug(pre);
  for (auto cur : distancias) {
    while(rem < n && get<0>(top_up[rem]) < cur) {
      const int where = where_is_it[get<1>(top_up[rem])];
      seg.modify(where, 0);
      ++rem;
    }
    seg.modify(0, cur);
    if (seg.worst_prefix() >= 0) {
      cout << cur << '\n';
      return 0;
    }
  }
  cout << "NO SOLUTION" << '\n';
  return 0;
}

Compilation message

FuelStation.cpp: In function 'int main()':
FuelStation.cpp:112:20: warning: statement has no effect [-Wunused-value]
   debug(distancias);
                    ^
FuelStation.cpp:113:13: warning: statement has no effect [-Wunused-value]
   debug(pre);
             ^

Subtask #1
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 2 ms 512 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 286 ms 70096 KB Output is correct
2 Correct 272 ms 69968 KB Output is correct
3 Correct 275 ms 70096 KB Output is correct
4 Correct 264 ms 69968 KB Output is correct
5 Correct 268 ms 70120 KB Output is correct
6 Correct 298 ms 70096 KB Output is correct
7 Correct 263 ms 70096 KB Output is correct
8 Correct 265 ms 70100 KB Output is correct
9 Correct 294 ms 69968 KB Output is correct
10 Correct 285 ms 70096 KB Output is correct
11 Correct 269 ms 70220 KB Output is correct
12 Correct 289 ms 70192 KB Output is correct
13 Correct 286 ms 70092 KB Output is correct
14 Correct 274 ms 70116 KB Output is correct
15 Correct 271 ms 70044 KB Output is correct
16 Correct 278 ms 70096 KB Output is correct
17 Correct 284 ms 70096 KB Output is correct
18 Correct 272 ms 70144 KB Output is correct
19 Correct 269 ms 70100 KB Output is correct
20 Correct 278 ms 70136 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 11 ms 2944 KB Output is correct
3 Correct 8 ms 2944 KB Output is correct
4 Correct 8 ms 2944 KB Output is correct
5 Correct 9 ms 2884 KB Output is correct
6 Correct 10 ms 2944 KB Output is correct
7 Correct 10 ms 2944 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 12 ms 2944 KB Output is correct
15 Correct 14 ms 2944 KB Output is correct
16 Correct 14 ms 2944 KB Output is correct
17 Correct 12 ms 2944 KB Output is correct
18 Correct 12 ms 2944 KB Output is correct
19 Correct 9 ms 2944 KB Output is correct
20 Correct 9 ms 2944 KB Output is correct
21 Correct 8 ms 2944 KB Output is correct
22 Correct 11 ms 2944 KB Output is correct
23 Correct 9 ms 2944 KB Output is correct
24 Correct 9 ms 2944 KB Output is correct
25 Correct 8 ms 2944 KB Output is correct

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 11 ms 2944 KB Output is correct
3 Correct 8 ms 2944 KB Output is correct
4 Correct 8 ms 2944 KB Output is correct
5 Correct 9 ms 2884 KB Output is correct
6 Correct 10 ms 2944 KB Output is correct
7 Correct 10 ms 2944 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 12 ms 2944 KB Output is correct
15 Correct 14 ms 2944 KB Output is correct
16 Correct 14 ms 2944 KB Output is correct
17 Correct 12 ms 2944 KB Output is correct
18 Correct 12 ms 2944 KB Output is correct
19 Correct 9 ms 2944 KB Output is correct
20 Correct 9 ms 2944 KB Output is correct
21 Correct 8 ms 2944 KB Output is correct
22 Correct 11 ms 2944 KB Output is correct
23 Correct 9 ms 2944 KB Output is correct
24 Correct 9 ms 2944 KB Output is correct
25 Correct 8 ms 2944 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 286 ms 70028 KB Output is correct
28 Correct 274 ms 70232 KB Output is correct
29 Correct 276 ms 70380 KB Output is correct
30 Correct 274 ms 70368 KB Output is correct
31 Correct 281 ms 70316 KB Output is correct
32 Correct 278 ms 70228 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 0 ms 384 KB Output is correct
36 Correct 1 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 521 ms 70324 KB Output is correct
40 Correct 481 ms 70220 KB Output is correct
41 Correct 485 ms 70224 KB Output is correct
42 Correct 460 ms 70484 KB Output is correct
43 Correct 464 ms 70348 KB Output is correct
44 Correct 324 ms 70224 KB Output is correct
45 Correct 320 ms 70224 KB Output is correct
46 Correct 276 ms 74164 KB Output is correct
47 Correct 260 ms 75604 KB Output is correct
48 Correct 247 ms 75524 KB Output is correct
49 Correct 255 ms 73432 KB Output is correct
50 Correct 267 ms 73828 KB Output is correct
51 Correct 261 ms 73812 KB Output is correct
52 Correct 269 ms 73572 KB Output is correct

Subtask #5
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 2 ms 512 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 2 ms 512 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 2 ms 512 KB Output isn't correct
4 Halted 0 ms 0 KB -