oj.uz

Submission #895000

# Submission time Handle Problem Language Result Execution time Memory
895000 2023-12-29T10:28:51 Z d4xn Wish (LMIO19_noras) C++17
0 / 100
 6 ms 12892 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

const int N = 1e6+6;

int n, R, a[N], b[N], c[N], d[N];
map<int, int> f;

signed main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n >> R;
  for (int i = 0; i < n; i++) {
    cin >> a[i] >> b[i] >> c[i] >> d[i];

    int x = c[i]-a[i];
    int y = d[i]-b[i];
  
    int l = 0;
    int r = 1e9;
    while (l < r) {
      int mid = (l+r)/2;

      bool in1 = (abs(a[i] + x*mid) + abs(b[i] + y*mid)) <= R;
      bool in2 = (abs(a[i] + x*(mid+1)) + abs(b[i] + y*(mid+1))) <= R;
assert(abs(a[i] + x*mid) + abs(b[i] + y*mid) != abs(a[i] + x*(mid+1)) + abs(b[i] + y*(mid+1)));
      if (in1 && in2) r = mid;
      else {
        if (abs(a[i] + x*mid) + abs(b[i] + y*mid) <= 
        abs(a[i] + x*(mid+1)) + abs(b[i] + y*(mid+1))) {
          r = mid;
        }
        else {
          l = mid+1;
        }
      }
    }
    int fst = l;

    l = 0;
    r = 1e9;
    while (l < r) {
      int mid = (l+r)/2;
      
      bool in1 = (abs(a[i] + x*mid) + abs(b[i] + y*mid)) <= R;
      bool in2 = (abs(a[i] + x*(mid+1)) + abs(b[i] + y*(mid+1))) <= R;
assert(abs(a[i] + x*mid) + abs(b[i] + y*mid) != abs(a[i] + x*(mid+1)) + abs(b[i] + y*(mid+1)));
      if (in1 && in2) l = mid+1;
      else {
        if (abs(a[i] + x*mid) + abs(b[i] + y*mid) < 
        abs(a[i] + x*(mid+1)) + abs(b[i] + y*(mid+1))) {
          r = mid;
        }
        else {
          l = mid+1;
        }
      }
    }
    int lst = l;

    bool in1 = (abs(a[i] + x*fst) + abs(b[i] + y*fst)) <= R;
    bool in2 = (abs(a[i] + x*lst) + abs(b[i] + y*lst)) <= R;
    //assert(in1 == in2);
    if (!in1) continue;
    f[fst]++;
    f[lst+1]--;
  }

  int ans = 0;
  int sum = 0;
  for (auto& [x, y] : f) {
    sum += y;
    ans = max(ans, sum);
  }
  cout << ans << "\n";
}

Compilation message

noras.cpp: In function 'int main()':
noras.cpp:64:10: warning: unused variable 'in2' [-Wunused-variable]
   64 |     bool in2 = (abs(a[i] + x*lst) + abs(b[i] + y*lst)) <= R;
      |          ^~~

Subtask #1
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Runtime error 6 ms 12892 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #2
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Runtime error 6 ms 12892 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Runtime error 6 ms 12892 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Runtime error 6 ms 12892 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Runtime error 6 ms 12892 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -