Submission #394096

#	Time	Username	Problem	Language	Result	Execution time	Memory
394096		Taresu	Ice Hockey World Championship (CEOI15_bobek)	C++11	50 / 100	546 ms	20768 KiB

bobek

#include <bits/stdc++.h>

#define ll long long 
#define pb push_back
#define upb(a, x) upper_bound(a.begin(), a.end(), x)
#define sz size 
#define stvr(a) sort(a.begin(), a.end())
using namespace std;

vector<ll int> l, r, rr, l1, v;
ll int  m;
ll int n;

bool lig(ll int a, ll int b){ return a&(1<<b); }

int main(){
	ios::sync_with_stdio(0);
	cin >> n >> m;

	for(ll int i=0;i<n;i++){
		int a;
	    cin >> a;
		if(a<=m) v.pb(a);
	}

	for(ll int i=0;i<v.sz()/2;i++) l.pb(v[i]);
	for(ll int i=v.sz()/2;i<v.sz();i++)r.pb(v[i]);
	
	for(ll int mask=0;mask<(1<<l.sz());mask++){
		ll int a=0;
		for(ll int i=0;i<l.sz();i++){
			if(lig(mask, i)) a+=l[i];
		}
		if(a<=m) l1.pb(a);
	}for(ll int mask=0;mask<(1<<r.sz());mask++){
		ll int a=0;
		for(ll int i=0;i<r.sz();i++){
			if(lig(mask, i)) a+=r[i];
		}
		if(a<=m) rr.pb(a);
	}

	stvr(rr);

	ll int resp=0;
	for(ll int i=0;i<l1.size();i++){	
		resp+=(ll int)(upb(rr, m-l1[i])-rr.begin());
	}

	cout << resp << '\n';

	return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:26:18: 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]
   26 |  for(ll int i=0;i<v.sz()/2;i++) l.pb(v[i]);
      |                 ~^~~~~~~~~
bobek.cpp:27:25: 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]
   27 |  for(ll int i=v.sz()/2;i<v.sz();i++)r.pb(v[i]);
      |                        ~^~~~~~~
bobek.cpp:31:19: 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]
   31 |   for(ll int i=0;i<l.sz();i++){
      |                  ~^~~~~~~
bobek.cpp:37:19: 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]
   37 |   for(ll int i=0;i<r.sz();i++){
      |                  ~^~~~~~~
bobek.cpp:46:18: 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]
   46 |  for(ll int i=0;i<l1.size();i++){
      |                 ~^~~~~~~~~~

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