oj.uz

답안 #800857

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
800857 2023-08-02T00:51:04 Z vjudge1 Sure Bet (CEOI17_sure) C++17
100 / 100
 74 ms 5208 KB 
/*
Templete by norman/KNN-07
Who tf even love CP :sob:
*/

#ifndef LOCAL
#pragma GCC optimize("Ofast,unroll-loops,inline")
// Bitwise pragma fuck
// #pragma GCC target("avx,avx2,bmi")

// Judges with GCC >= 12 only needs Ofast
// #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize")
// MLE optimization
// #pragma GCC optimize("conserve-stack")
// Old judges
// #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2")
// New judges. Test with assert(__builtin_cpu_supports("avx2"));
// #pragma GCC target("arch=skylake")
// Atcoder
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
#endif

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

// Wish you can debug? YesYes
#ifndef LOCAL
#define cerr \
    if (0)   \
    cerr
#endif

// Policy based DS?
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;

// Who tf deal with overflow
// #define int long long

/*
pbds blog :
https://codeforces.com/blog/entry/11080
https://codeforces.com/blog/entry/13279
*/
// Useful pbds
// template <typename T>
// using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
// template <typename T>
// using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
// typedef trie<string, null_type, trie_string_access_traits<>, pat_trie_tag, trie_prefix_search_node_update> pref_trie;

#define el '\n'
#define mpp make_pair
#define pb push_back
#define ppb pop_back
#define pf push_front
#define emp emplace_back
#define fi first
#define nd second
#define forinc(i, a, b) for (int i = (a); i <= (b); i++)
#define fordec(i, a, b) for (int i = (a); i >= (b); i--)
#define alle(x) (x).begin(), (x).end()
#define ralle(x) (x).rbegin(), (x).rend()
#define mms(a, v) memset(a, v, sizeof(a))
#define lwb(a, v) lower_bound((a).begin(), (a).end(), v)
#define upb(a, v) upper_bound((a).begin(), (a).end(), v)
#define bit(i, a) (((a) >> (i)) & 1)

#define BIT_SET(a, b) ((a) |= (1ULL << (b)))
#define BIT_CLEAR(a, b) ((a) &= ~(1ULL << (b)))
#define BIT_FLIP(a, b) ((a) ^= (1ULL << (b)))
#define BIT_CHECK(a, b) (!!((a) & (1ULL << (b))))
#define BITMASK_SET(x, mask) ((x) |= (mask))
#define BITMASK_CLEAR(x, mask) ((x) &= (~(mask)))
#define BITMASK_FLIP(x, mask) ((x) ^= (mask))
#define BITMASK_CHECK_ALL(x, mask) (!(~(x) & (mask)))
#define BITMASK_CHECK_ANY(x, mask) ((x) & (mask))
#define POPCNT(mask) __builtin_popcount(mask)
#define POPCNTLL(mask) __builtin_popcountll(mask)
#define CTZ(mask) __builtin_ctz(mask)
#define CTZLL(mask) __builtin_ctzll(mask)

typedef long long ll;
typedef unsigned long long ull;
typedef long double ldb;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef map<int, int> mii;
typedef map<ll, ll> mll;
typedef vector<bool> vb;

template <typename T, typename U>
inline void maximize(T &x, U y)
{
    if (y < x)
        x = y;
}
template <typename T, typename U>
inline void minimize(T &x, U y)
{
    if (x < y)
        x = y;
}
inline int add_m(int a, int b, int mod)
{
    int res = a + b;
    return (res >= mod ? res - mod : res);
}
inline int mod_neg(int a, int b, int mod)
{
    int res;
    if (abs(a - b) < mod)
        res = a - b;
    else
        res = (a - b) % mod;
    return (res < 0 ? res + mod : res);
}
inline int mul_wmod(int a, int b, int c)
{
    ll res = (ll)a * b;
    return (res >= c ? res % c : res);
}
inline int mul_wnmod(int a, int b, int c)
{
    ll res = (ll)a * b;
    return ((res % c) + c) % c;
}

// Debugger Utils
template <typename set1, typename set2>
ostream &operator<<(ostream &os, const pair<set1, set2> &p) { return os << '(' << p.first << ", " << p.second << ')'; }

template <size_t i, class T>
ostream &print_tuple_utils(ostream &out, const T &tup)
{
    if constexpr (i == tuple_size<T>::value)
        return out << ")";
    else
        return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup);
}
template <class... U>
ostream &operator<<(ostream &out, const tuple<U...> &t)
{
    return print_tuple_utils<0, tuple<U...>>(out, t);
}
#define db(val) "[" #val " = " << (val) << "] "
// End if debugger utils

namespace Hasher
{
    struct custom_hash
    {
        static uint32_t splitmix64(uint32_t x)
        {
            x += 0x9e3779b97f4a7c15;
            x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
            x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
            return x ^ (x >> 31);
        }
        size_t operator()(uint64_t x) const
        {
            static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
            return splitmix64(x + FIXED_RANDOM);
        }
    };
    struct hash_pair
    {
        template <class T1, class T2>
        size_t operator()(const pair<T1, T2> &p) const
        {
            auto hash1 = custom_hash{}(p.first);
            auto hash2 = custom_hash{}(p.second);
            if (hash1 != hash2)
                return hash1 ^ hash2;
            return hash1;
        }
    };
    struct hash_pair_pair
    {
        template <class T1, class T2>
        size_t operator()(const pair<T1, T2> &p) const
        {
            auto hash1 = custom_hash{}(p.first);
            auto hash2 = hash_pair{}(p.second);
            if (hash1 != hash2)
                return hash1 ^ hash2;
            return hash1;
        }
    };
}
using namespace Hasher;

const string taskname = "SUREBET";
const bool tc = 0;

const int oo = 1e9, mod = 1e9 + 7;
const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
const ll ool = 1e18;
const ldb eps = 1e-6;
const int MAXN = 1e6;

/*
Author: normankr07
Problem:

Submission links:

Editorial links:

Algorithm:
*/

typedef pair<ldb, ldb> pdb;
ldb a[MAXN], b[MAXN];

void solve()
{
    int n;
    cin >> n;
    forinc(i, 1, n) cin >> a[i] >> b[i];
    sort(a + 1, a + 1 + n, greater<ldb>());
    sort(b + 1, b + 1 + n, greater<ldb>());
    int ptr1 = 1, ptr2 = 1;
    ldb set1 = 0, set2 = 0, ans = 0;
    forinc(i, 1, 2 * n)
    {
        if ((ptr1 <= n) && ((ptr2 == n + 1) | (set1 < set2)))
        {
            set1 += a[ptr1];
            ptr1++;
        }
        else
        {
            set2 += b[ptr2];
            ptr2++;
        }
        ans = max(ans, min(set1, set2) - i * 1.0L);
    }
    cout << fixed << setprecision(4) << ans;
}

int32_t main()
{
    if (fopen((taskname + ".inp").c_str(), "r"))
    {
        freopen((taskname + ".inp").c_str(), "r", stdin);
        freopen((taskname + ".out").c_str(), "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int tsc = 1;
    if (tc)
    {
        cin >> tsc;
    }
    while (tsc--)
    {
        solve();
        cout << el;
    }
#ifdef LOCAL
    cerr << "\n"
         << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
}

Compilation message

sure.cpp: In function 'int32_t main()':
sure.cpp:249:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  249 |         freopen((taskname + ".inp").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sure.cpp:250:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  250 |         freopen((taskname + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 336 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 336 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 68 ms 4832 KB Output is correct
18 Correct 69 ms 4828 KB Output is correct
19 Correct 68 ms 4788 KB Output is correct
20 Correct 74 ms 4812 KB Output is correct
21 Correct 73 ms 5116 KB Output is correct
22 Correct 68 ms 4804 KB Output is correct
23 Correct 70 ms 4724 KB Output is correct
24 Correct 69 ms 4832 KB Output is correct
25 Correct 70 ms 4792 KB Output is correct
26 Correct 73 ms 5208 KB Output is correct