Submission #801670

#	Time	Username	Problem	Language	Result	Execution time	Memory
801670		arush_agu	Sure Bet (CEOI17_sure)	C++17	100 / 100	79 ms	3624 KiB

sure

#include <algorithm>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#ifdef DEBUG
#include <time.h>
#endif

#define all(a) (a).begin(), (a).end()
#define rev(a) (a).rbegin(), (a).rend()
#define F first
#define S second
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x)                                                                 \
  {                                                                            \
    ++recur_depth;                                                             \
    auto x_ = x;                                                               \
    --recur_depth;                                                             \
    cerr << string(recur_depth, '\t') << "\e[91m" << __func__ << ":"           \
         << __LINE__ << "\t" << #x << " = " << x_ << "\e[39m" << endl;         \
  }
#else
#define dbg(x)
#endif

using namespace std;
using namespace __gnu_pbds;

typedef pair<int, int> ii;

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> llll;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pair<int, int>> vii;
typedef vector<vii> vvii;

typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pair<ll, ll>> vll;
typedef vector<vll> vvll;

typedef vector<bool> vb;

template <class type1>
using ordered_set = tree<type1, null_type, less<type1>, rb_tree_tag,
                         tree_order_statistics_node_update>;

template <typename A, typename B>
ostream &operator<<(ostream &os, const pair<A, B> &p) {
  return os << '(' << p.first << ", " << p.second << ')';
}
template <typename T_container, typename T = typename enable_if<
                                    !is_same<T_container, string>::value,
                                    typename T_container::value_type>::type>
ostream &operator<<(ostream &os, const T_container &v) {
  os << '{';
  string sep;
  for (const T &x : v)
    os << sep << x, sep = ", ";
  return os << '}';
}

const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ll INF = 1e9;
const ld EPS = 1e-9;

void solve() {
  int n, idx1, idx2;
  vector<double> a, b;
  double s1, s2, ans;

  cin >> n;
  a.resize(n + 1, 0);
  b.resize(n + 1, 0);
  for (int i = 0; i < n; i++) {
    cin >> a[i] >> b[i];
  }

  sort(a.begin(), a.end(), greater<double>());
  sort(b.begin(), b.end(), greater<double>());

  while (idx1 <= n && idx2 <= n) {
    if (s1 < s2) {
      s1 += a[idx1];
      idx1++;
    } else {
      s2 += b[idx2];
      idx2++;
    }
    s1--;
    s2--;
    ans = max(ans, min(s1, s2));
  }

  cout << fixed << setprecision(4) << ans << "\n";
}

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

  clock_t start = clock();

  int test_cases = 1;
  // cin >> test_cases;

  while (test_cases--)
    solve();

#ifdef DEBUG
  cerr << fixed << setprecision(10)
       << "\nTime Taken: " << (double)(clock() - start) / CLOCKS_PER_SEC
       << "s\n";
#endif
  return 0;
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:127:11: warning: unused variable 'start' [-Wunused-variable]
  127 |   clock_t start = clock();
      |           ^~~~~
sure.cpp: In function 'void solve()':
sure.cpp:93:10: warning: 'idx1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   93 |   int n, idx1, idx2;
      |          ^~~~
sure.cpp:93:16: warning: 'idx2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   93 |   int n, idx1, idx2;
      |                ^~~~
sure.cpp:112:10: warning: 's2' may be used uninitialized in this function [-Wmaybe-uninitialized]
  112 |       s2 += b[idx2];
sure.cpp:109:10: warning: 's1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  109 |       s1 += a[idx1];

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40