Submission #919791

#	Time	Username	Problem	Language	Result	Execution time	Memory
919791		VMaksimoski008	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	336 ms	22700 KiB

bobek

#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;

int32_t main() {
    int n;
    ll m, ans = 1;
    cin >> n >> m;

    vector<ll> v(n);
    for(ll &x : v) cin >> x;

    auto meet = [&](int l, int r) {
        vector<ll> total;

        int len = r - l + 1;
        for(int s=1; s<(1<<len); s++) {
            ll sum = 0;
            for(int i=0; i<len; i++)
                if(s & (1 << i)) sum += v[l+i];
            total.push_back(sum);
            if(sum <= m) ans++;
        }

        sort(all(total));
        return total;
    };

    vector<ll> L = meet(0, n/2-1);
    vector<ll> R = meet(n/2, n-1);

    for(ll &x : L) {
        int l=0, r=R.size()-1, p=-1;

        while(l <= r) {
            int mid = (l + r) / 2;
            if(x + R[mid] <= m) p = mid, l = mid + 1;
            else r = mid - 1;
        }

        ans += p + 1;
    }

    cout << ans << '\n';
    return 0;
}

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