Submission #95748

#	Time	Username	Problem	Language	Result	Execution time	Memory
95748		popovicirobert	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	345 ms	20984 KiB

bobek

#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int MAXN = 40;

ll a[MAXN], b[MAXN];

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, n;
    ll m;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n >> m;
    int sz1 = (n + 1) / 2, sz2 = n / 2;
    for(i = 0; i < sz1; i++) {
        cin >> a[i];
    }
    vector <ll> sa;
    for(int conf = 0; conf < (1 << sz1); conf++) {
        ll cur = 0;
        for(i = 0; i < sz1; i++) {
            if(conf & (1 << i)) {
                cur += a[i];
            }
        }
        sa.push_back(cur);
    }
    sort(sa.begin(), sa.end());
    for(i = 0; i < sz2; i++) {
        cin >> b[i];
    }
    vector <ll> sb;
    for(int conf = 0; conf < (1 << sz2); conf++) {
        ll cur = 0;
        for(i = 0; i < sz2; i++) {
            if(conf & (1 << i)) {
                cur += b[i];
            }
        }
        sb.push_back(cur);
    }
    sort(sb.begin(), sb.end());
    int pos = (1 << sz2) - 1;
    ll ans = 0;
    for(i = 0; i < (1 << sz1); i++) {
        while(pos >= 0 && sa[i] + sb[pos] > m) {
            pos--;
        }
        ans += pos + 1;
    }
    cout << ans;
    //cin.close();
    //cout.close();
    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