Submission #894619

#	Time	Username	Problem	Language	Result	Execution time	Memory
894619		IWKR	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	425 ms	22716 KiB

bobek

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

#define int long long

int32_t main() {
    int n, m;
    cin >> n >> m;
    int arr[n];
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
    }
    int a = n / 2;
    vector<int> v;
    vector<int> v2;
    int ans = 0;
    for (int i = 0; i < (1 << a); i++) {
        int res = 0;
        for (int j = 0; j < a; j++) {
            if (i & (1 << j)) {
                res += arr[j];
            }
        }
        if (res <= m) {
            v.push_back(res);
        }
    }
    int b = n - a;
    for (int i = 0; i < (1 << b); i++) {
        int res = 0;
        for (int j = 0; j < b; j++) {
            if (i & (1 << j)) {
                res += arr[a + j];
            }
        }
        if (res <= m) {
            v2.push_back(res);
        }
    }
    sort(v.begin(), v.end());
    for (int i = 0; i < v2.size(); i++) {
        int low = 0;
        int high = v.size();
        while (high - low > 1) {
            int mid = (high + low) / 2;
            if (v[mid] + v2[i] <= m) {
                low = mid;
            } else {
                high = mid;
            }
        }
        ans += low + 1;
    }
    cout << ans;
}

Compilation message (stderr)

bobek.cpp: In function 'int32_t main()':
bobek.cpp:41:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for (int i = 0; i < v2.size(); i++) {
      |                     ~~^~~~~~~~~~~

• 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