Submission #963421

#	Time	Username	Problem	Language	Result	Execution time	Memory
963421		pcc	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	302 ms	21064 KiB

bobek

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

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>

const int mxn = 40;

ll N,M;
vector<ll> lv,rv;
vector<ll> la,ra;

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

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>N>>M;
	for(int i = 0;i<N/2;i++){
		ll k;
		cin>>k;
		la.push_back(k);
	}
	for(int i = N/2;i<N;i++){
		ll k;
		cin>>k;
		ra.push_back(k);
	}
	calc(la,lv);
	calc(ra,rv);
	ll pt = 0;
	ll ans = 0;
	reverse(lv.begin(),lv.end());
	for(auto &i:lv){
		while(pt<rv.size()&&rv[pt]+i<=M)pt++;
		ans += pt;
	}
	cout<<ans<<'\n';
	return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'void calc(std::vector<long long int>&, std::vector<long long int>&)':
bobek.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for(int j = 0;j<v.size();j++){
      |                 ~^~~~~~~~~
bobek.cpp: In function 'int main()':
bobek.cpp:48:11: 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]
   48 |   while(pt<rv.size()&&rv[pt]+i<=M)pt++;
      |         ~~^~~~~~~~~~

• 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