Submission #1121521

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121521		vjudge1	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	361 ms	8736 KiB

bobek

#pragma GCC optimize("O2,O3,Ofast,unroll-loops")
#pragma GCC target("sse,sse2,sse3,sse4,sse4.1,sse4.2,popcnt,lzcnt,abm,mmx,avx,avx2,fma,bmi,bmi2")
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
using namespace std;

int main(){
    fast;
    ll a,b,x;
    cin>>a>>b;
    vector<ll>p1,p2,v;
    for(ll i=0;i<a;i++){
        cin>>x;
        if(i<((a+1)/2)) p1.push_back(x);
        else p2.push_back(x);
    }
    for(ll i=0;i<(1<<p2.size());i++){
        ll sum=0;
        for(ll j=0;j<p2.size();j++){
            if(i&(1<<j)){
                sum+=p2[j];
            }
        }
        v.push_back(sum);
    }
    sort(v.begin(),v.end());
    ll cvb=0,sum=0;
    for(ll i = 0;i<(1<<p1.size());i++){
        ll sum=0;
        for(ll j=0;j<p1.size();j++){
            if(i&(1<<j)){
                sum+=p1[j];
            }
        }
        cvb+=upper_bound(v.begin(),v.end(),(b-sum))-v.begin();
    }
    cout<<cvb;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:20:21: 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]
   20 |         for(ll j=0;j<p2.size();j++){
      |                    ~^~~~~~~~~~
bobek.cpp:31:21: 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 j=0;j<p1.size();j++){
      |                    ~^~~~~~~~~~
bobek.cpp:28:14: warning: unused variable 'sum' [-Wunused-variable]
   28 |     ll cvb=0,sum=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