Submission #170957

#	Time	Username	Problem	Language	Result	Execution time	Memory
170957		reda	Ice Hockey World Championship (CEOI15_bobek)	C++14	0 / 100	360 ms	42436 KiB

bobek

#include<bits/stdc++.h>
#define endl '\n'
#define pii pair<int,int>
#define fi first
#define se second
#define ll long long 
#define pb push_back
#define all(x) x.begin(),x.end()
#pragma GCC optimize ("Ofast","unroll-loops")
using namespace std;
const int MOD = 1e9+7;
const int MAXN = 50;
ll  ans  = 0 ;
ll  n, m ; 
void solve(ll idx  ,  ll  sum ,  ll  arr[] ,  vector<ll> &v , ll k )
{
    if(sum>m || idx>k)return ;
    if(idx==k && sum<=m)v.push_back(sum);
    solve(idx+1,sum,arr,v,k);
    solve(idx+1,sum+arr[idx],arr,v,k);
}
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m ;
    ll arr[n+1];
    int i =  1 ;
    while(cin>>arr[i])
    {
        i++;
        if(i==n/2)break;
    }
    vector<ll> v1,v2;
    solve(1,0,arr,v1,i);
    i = 1 ;
    while(cin>>arr[i])
    {
        i++;
    }
    solve(1,0,arr,v2,i);
    sort(all(v1));
    sort(all(v2));
     i = 0 ;ll j = 0 ;
    while(i<v1.size()&&j<v2.size())
    {
    	if(v1[i]+v2[j]>m)break;
        while(v1[i]+v2[j]<=m)j++;
        ans+=j+1;
        i++;
    }
   for(int i = 0 ;i < v2.size();i++)
    {
        ans+=(v2[i]<=m);
    }
    for(int i = 0 ;i < v1.size();i++)
    {
        ans+=(v1[i]<=m);
    }
    cout<<(ans-1)/2<<endl;
    return 0 ;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:45:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(i<v1.size()&&j<v2.size())
           ~^~~~~~~~~~
bobek.cpp:45:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(i<v1.size()&&j<v2.size())
                        ~^~~~~~~~~~
bobek.cpp:52:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 0 ;i < v2.size();i++)
                   ~~^~~~~~~~~~~
bobek.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0 ;i < v1.size();i++)
                    ~~^~~~~~~~~~~

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