oj.uz

Submission #930240

# Submission time Handle Problem Language Result Execution time Memory
930240 2024-02-19T07:29:02 Z NeroZein Autobahn (COI21_autobahn) C++17
100 / 100
 75 ms 23484 KB 
#include "bits/stdc++.h"
using namespace std;

#ifdef Nero
#include "Deb.h"
#else
#define debug(...)
#endif

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, k, x;
  cin >> n >> k >> x;
  vector<int> lp(n), t(n), rp(n);
  for (int i = 0; i < n; ++i) {
    cin >> lp[i] >> t[i] >> rp[i];
  }
  vector<array<int, 3>> pts;//second, pay, stay
  for (int i = 0; i < n; ++i) {
    if (rp[i] - lp[i] + 1 < t[i]) continue;
    pts.push_back({lp[i], 0, 1});
    pts.push_back({lp[i] + t[i], 1, 0});
    pts.push_back({rp[i] + 1, -1, -1});
  }
  vector<int> len;
  sort(pts.begin(), pts.end());
  vector<array<int, 3>> rng;//l, r, val
  int p = 0, s = 0;
  for (int i = 0; i < (int) pts.size() - 1; ++i) {
    auto [second, pay, stay] = pts[i];
    s += stay;
    p += pay; 
    int val = (s >= k ? p : 0);
    if (pts[i + 1][0] > second) {
      len.push_back({pts[i + 1][0] - second});
      rng.push_back({second, pts[i + 1][0] - 1, val});      
    }
  }
  long long ans = 0; 
  for (int rep = 0; rep < 2; ++rep) {
    //debug(len, rng);
    int r = -1;
    int curLen = 0; 
    long long curVal = 0; 
    int m = (int) rng.size(); 
    for (int l = 0; l < m; ++l) {
      while (r + 1 < m && curLen + len[r + 1] <= x) {
        curLen += len[r + 1];
        curVal += (long long) len[r + 1] * rng[r + 1][2];
        r++;
      }
      if (r < l) {
        curLen = curVal = 0; 
        ans = max(ans, (long long) x * rng[l][2]);
        r = l; 
        continue;
      }
      int space = x - curLen;
      if (r + 1 < m) {
        long long tmp = curVal;
        tmp += (long long) space * rng[r + 1][2];
        ans = max(ans, tmp); 
      }
      ans = max(ans, curVal);
      curLen -= len[l];
      curVal -= (long long) rng[l][2] * len[l];
    }    
    reverse(len.begin(), len.end());
    reverse(rng.begin(), rng.end());
  }
  cout << ans << '\n';
  return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 464 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 344 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 464 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 71 ms 22924 KB Output is correct
22 Correct 75 ms 23484 KB Output is correct
23 Correct 67 ms 21956 KB Output is correct
24 Correct 59 ms 20412 KB Output is correct
25 Correct 67 ms 22972 KB Output is correct
26 Correct 62 ms 22336 KB Output is correct
27 Correct 61 ms 21048 KB Output is correct
28 Correct 66 ms 22964 KB Output is correct
29 Correct 68 ms 21292 KB Output is correct