Submission #1147360

#	Time	Username	Problem	Language	Result	Execution time	Memory
1147360		fryingduc	Self Study (JOI22_ho_t2)	C++20	100 / 100	106 ms	5136 KiB

Main

#include "bits/stdc++.h"
using namespace std;

#ifdef duc_debug
#include "bits/debug.h"
#else
#define debug(...)
#endif

const int maxn = 3e5 + 5;
int n, m;
long long a[maxn], b[maxn];

bool check(long long mid) {
  long long cnt = 0;
  for (int i = 1; i <= n; ++i) {
    if (1ll * a[i] * m >= mid) {
      long long x = (1ll * a[i] * m - mid) / a[i];
      cnt += x;
    }
  }
  for (int i = 1; i <= n; ++i) {
    if (1ll * a[i] * m < mid) {
      long long need = mid - 1ll * a[i] * m;
      need = (need + b[i] - 1) / b[i];
      cnt -= need;
      if (cnt < 0) return 0;
    }
  }
  return cnt >= 0;
}

void solve() {
  cin >> n >> m;
  for (int i = 1; i <= n; ++i) {
    cin >> a[i];
  }
  for (int i = 1; i <= n; ++i) {
    cin >> b[i];
    a[i] = max(a[i], b[i]);
  }
  long long l = 0, r = 1e18, res = 0;
  while (l <= r) {
    long long mid = (l + r) >> 1;
    if (check(mid)) {
      res = mid;
      l = mid + 1;
    } else {
      r = mid - 1;
    }
  }
  cout << res;
}

signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  solve();

  return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9