Submission #968530

#	Time	Username	Problem	Language	Result	Execution time	Memory
968530		vjudge1	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	289 ms	22192 KiB

bobek

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
using ll = long long;
const int N = 44;

ll n, m;
vector<ll> lv, rv;
vector<ll> la, ra;

void calc(vector<ll> &v, vector<ll> &res){
    for (int i = 0;i < (1<<v.size());i++){
        ll sm = 0;
        for (int j = 0;j < v.size();j++){
            if (i&(1<<j)) sm += v[j];
        }
        res.push_back(sm);
    }
    sort(res.begin(), res.end());
}

int main()
{
    int n;
    ll k; scanf("%d %lld", &n, &k);;
    for (int i = 0;i < n/2;i++){
        ll v; scanf("%lld", &v);
        la.push_back(v);
    }
    for (int i = n/2;i < n;i++){
        ll v; scanf("%lld", &v);
        ra.push_back(v);
    }
    calc(la, lv);
    calc(ra, rv);
    ll p = 0ll, ans = 0ll;
    reverse(lv.begin(), lv.end());
    for (auto e:lv){
        while (p < rv.size() && rv[p]+e <= k) p++;
        ans += p;
    }
    printf("%lld", ans);
}

Compilation message (stderr)

bobek.cpp: In function 'void calc(std::vector<long long int>&, std::vector<long long int>&)':
bobek.cpp:16:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         for (int j = 0;j < v.size();j++){
      |                        ~~^~~~~~~~~~
bobek.cpp: In function 'int main()':
bobek.cpp:41:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         while (p < rv.size() && rv[p]+e <= k) p++;
      |                ~~^~~~~~~~~~~
bobek.cpp:27:16: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     ll k; scanf("%d %lld", &n, &k);;
      |           ~~~~~^~~~~~~~~~~~~~~~~~~
bobek.cpp:29:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         ll v; scanf("%lld", &v);
      |               ~~~~~^~~~~~~~~~~~
bobek.cpp:33:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         ll v; scanf("%lld", &v);
      |               ~~~~~^~~~~~~~~~~~

• 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