oj.uz

답안 #113127

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
113127 2019-05-23T20:22:48 Z ioilolcom Ice Hockey World Championship (CEOI15_bobek) C++14
100 / 100
 329 ms 20948 KB 
#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
#define all(s) s.begin(),s.end()
typedef long long int ll;
vector<ll> v1,v2,v;
vector<ll>d1,d2;
ll n,m;
void solve(int idx,ll s,int t){
	if(t==1) {
		if(idx==(int)v1.size()) {
			if(s<=m) d1.push_back(s);
			return;
		}
		solve(idx+1,s+v1[idx],t);
		solve(idx+1,s,t);
	}
	else{
		if(idx==(int)v2.size()) {
			if(s<=m) d2.push_back(s);
			return;
		}
		solve(idx+1,s+v2[idx],t);
		solve(idx+1,s,t);
	}

}

/*
   ll ans=0;
   void solv(int idx,ll s){
        if(idx==n) {
                if(s<=m) {
                        ans++;
                }
                return;
        }
        solv(idx+1,s+v[idx]);
        solv(idx+1,s);
   }
 */
int main()
{

	ios_base:: sync_with_stdio(false); cin.tie(0);
	cin>>n>>m;
	for(int i=1; i<=n; i++) {
		ll a; cin>>a;
		if(i&1) v1.push_back(a);
		else v2.push_back(a);
	}

	solve(0,0,1);
	solve(0,0,2);
	ll ans=0;
	//solv(0,0);
/*
   cout<<"one"<<endl;
        for(int v:v1) {
                cout<<v<<" ";
        }
        cout<<endl;
        cout<<"two"<<endl;
        for(int v:v2) {
                cout<<v<<" ";
        }
        cout<<endl;
 */
	sort(all(d1)); sort(all(d2));

	sort(all(d2));
	sort(all(d1));
	//cout<<"set 1"<<endl;
	for(ll v:d1) {
		//	cout<<v<<endl;
		int l=0;
		int r=(int)d2.size()-1;
		int an=-1;
		while(l<=r) {
			int mid=(l+r)/2;
			if(d2[mid]+v<=m) {
				an=mid;
				l=mid+1;
			}
			else{
				r=mid-1;
			}
		}

		//cout<<"max "<<an<<endl;
		if(an!=-1) ans+=(an+1);
	}
	cout<<ans<<endl;
/*
        cout<<"set 2"<<endl;
        for(int v:d2) {
                cout<<v<<endl;
                //	auto it=lower_bound(all(d2),m-v);
                //cout<<(distance(d2.begin(),it))<<endl;
        }
 */
	//cout<<ans<<endl;

	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 2424 KB Output is correct
2 Correct 76 ms 5492 KB Output is correct
3 Correct 321 ms 20948 KB Output is correct
4 Correct 76 ms 5492 KB Output is correct
5 Correct 13 ms 1660 KB Output is correct
6 Correct 9 ms 1024 KB Output is correct
7 Correct 3 ms 384 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 2936 KB Output is correct
2 Correct 28 ms 2424 KB Output is correct
3 Correct 120 ms 10608 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 8 ms 1024 KB Output is correct
6 Correct 16 ms 1660 KB Output is correct
7 Correct 3 ms 384 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 4532 KB Output is correct
2 Correct 119 ms 8560 KB Output is correct
3 Correct 120 ms 8560 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 68 ms 8560 KB Output is correct
6 Correct 245 ms 20948 KB Output is correct
7 Correct 6 ms 256 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 244 ms 16852 KB Output is correct
2 Correct 27 ms 2424 KB Output is correct
3 Correct 10 ms 1024 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 7 ms 1024 KB Output is correct
6 Correct 226 ms 16856 KB Output is correct
7 Correct 3 ms 384 KB Output is correct

Subtask #9
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 2424 KB Output is correct
2 Correct 73 ms 5492 KB Output is correct
3 Correct 9 ms 1024 KB Output is correct
4 Correct 9 ms 996 KB Output is correct
5 Correct 75 ms 8672 KB Output is correct
6 Correct 25 ms 2424 KB Output is correct
7 Correct 14 ms 384 KB Output is correct

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 309 ms 20836 KB Output is correct
2 Correct 31 ms 2424 KB Output is correct
3 Correct 10 ms 1024 KB Output is correct
4 Correct 329 ms 20800 KB Output is correct
5 Correct 94 ms 10608 KB Output is correct
6 Correct 18 ms 1660 KB Output is correct
7 Correct 3 ms 384 KB Output is correct