제출 #1054084

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1054084		otarius	Ice Hockey World Championship (CEOI15_bobek)	C++17	40 / 100	114 ms	9964 KiB

bobek

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

// #pragma GCC optimize("Ofast")
// #pragma GCC optimize ("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#define ff first
#define sc second
#define pb push_back
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define ull unsigned long long
#define all(x) (x).begin(),(x).end()

#define int long long
// #define int unsigned long long

// #define ordered_set(T) tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>
// #define ordered_multiset(T) tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>

void open_file(string filename) {
    freopen((filename + ".in").c_str(), "r", stdin);
    freopen((filename + ".out").c_str(), "w", stdout);
}

// const ll mod = 1e9 + 7;
// const ll mod = 998244353;

const ll inf = 1e9;
const ll biginf = 1e18;
// const int maxN;

void solve() {
    int n; ll m;
    cin >> n >> m;
    vector<int> a, b;
    vector<ll> arr1, arr2;
    for (int i = 1; i <= n; i++) {
        int x; cin >> x;
        if (x <= (n + 1) / 2) a.pb(x);
        else b.pb(x);
    } int x = a.size();
    for (int i = 0; i < (1 << x); i++) {
        ll sum = 0;
        for (int j = 0; j < x; j++)
            if ((i >> j) & 1) sum += a[j];
        if (sum <= m) arr1.pb(sum);
    } x = b.size();
    for (int i = 0; i < (1 << x); i++) {
        ll sum = 0;
        for (int j = 0; j < x; j++)
            if ((i >> j) & 1) sum += b[j];
        if (sum <= m) arr2.pb(sum);
    } ll ans = 0;
    sort(all(arr1));
    sort(all(arr2));
    for (ll x : arr1) {
        ans += lower_bound(all(arr2), m - x + 1) - arr2.begin();
    } cout << ans;
}
int32_t main() { 
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
        cout << '\n';
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

bobek.cpp: In function 'void open_file(std::string)':
bobek.cpp:26:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     freopen((filename + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bobek.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen((filename + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10