oj.uz

Submission #955027

# Submission time Handle Problem Language Result Execution time Memory
955027 2024-03-29T07:57:45 Z evenvalue Sure Bet (CEOI17_sure) C++17
100 / 100
 64 ms 1364 KB 
#include <bits/stdc++.h>
using namespace std;

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

using int64 = long long;
using ld = long double;

template<typename T>
using min_heap = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using max_heap = priority_queue<T, vector<T>, less<T>>;

namespace Read {
int Int() {
  int x;
  cin >> x;
  return x;
}
int64 Int64() {
  int64 x;
  cin >> x;
  return x;
}
char Char() {
  char c;
  cin >> c;
  return c;
}
string String() {
  string s;
  cin >> s;
  return s;
}
double Double() {
  return stod(String());
}
ld LongDouble() {
  return stold(String());
}
template<typename T1, typename T2>
pair<T1, T2> Pair() {
  pair<T1, T2> p;
  cin >> p.first >> p.second;
  return p;
}
template<typename T>
vector<T> Vec(const int n) {
  vector<T> v(n);
  for (T &x : v) {
    cin >> x;
  }
  return v;
}
template<typename T>
vector<vector<T>> VecVec(const int n, const int m) {
  vector<vector<T>> v(n);
  for (vector<T> &vec : v) {
    vec = Vec<T>(m);
  }
  return v;
}
}//namespace Read

constexpr int kInf = 1e9 + 10;
constexpr int64 kInf64 = 1e15 + 10;
constexpr int kMod = 1e9 + 7;
constexpr int kMaxN = 1e5 + 10;
constexpr int kMaxBet = 1e3;
constexpr int kScale = 1e4;

inline void solution() {
  const int n = Read::Int();

  vector<int> a(n);
  vector<int> b(n);

  for (int i = 0; i < n; i++) {
    a[i] = round(Read::Double() * kScale);
    b[i] = round(Read::Double() * kScale);
  }

  sort(a.rbegin(), a.rend());
  sort(b.rbegin(), b.rend());

  auto check = [&](const int64 profit) -> bool {
    int64 bought = 0;
    int64 second = 0, first = 0;

    for (int i = 0, j = 0; min(first, second) - bought < profit and (i < n or j < n);) {
      if (i != n and first == min(first, second)) {
        first += a[i++];
      } else if (j != n) {
        second += b[j++];
      } else {
        break;
      }
      bought += kScale;
    }
    return min(first, second) - bought >= profit;
  };

  int64 lo = 0, hi = kMaxN * 1LL * kMaxBet * 1LL * kScale;
  while (lo < hi) {
    const int64 mid = (lo + hi + 1) / 2;
    if (check(mid)) {
      lo = mid;
    } else {
      hi = mid - 1;
    }
  }

  cout << (ld)lo / kScale << '\n';
}

int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);

  //freopen(".in", "r", stdin);
  //freopen(".out", "w", stdout);

  cout << fixed << setprecision(4);

  int testcases = 1;
  //cin >> testcases;
  while (testcases--) {
    solution();
  }
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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 61 ms 1116 KB Output is correct
18 Correct 54 ms 1116 KB Output is correct
19 Correct 58 ms 1112 KB Output is correct
20 Correct 56 ms 1224 KB Output is correct
21 Correct 62 ms 1240 KB Output is correct
22 Correct 56 ms 1112 KB Output is correct
23 Correct 54 ms 1116 KB Output is correct
24 Correct 55 ms 1228 KB Output is correct
25 Correct 56 ms 1112 KB Output is correct
26 Correct 64 ms 1364 KB Output is correct