Submission #676494

#	Time	Username	Problem	Language	Result	Execution time	Memory
676494		penguin133	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	331 ms	20884 KiB

bobek

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

long long n,m,A[45],cnt=1;
vector<long long> v1, v2;
void dfs(int i, long long v){
	if(i > n/2)return;
	if(v >= A[i]){
		cnt++;
		v1.push_back(m-v+A[i]);
		dfs(i+1, v-A[i]);
	}
	dfs(i+1, v);
}
void dfs2(int i, long long v){
	if(i > n)return;
	if(v >= A[i]){
		cnt++;
		v2.push_back(m-v+A[i]);
		dfs2(i+1, v-A[i]);
	}
	dfs2(i+1, v);
}
int main(){
	cin >> n >> m;
	for(int i=1;i<=n;i++)cin >> A[i];
	dfs(1, m);
	dfs2(n/2+1, m);
	sort(v2.begin(), v2.end());
	for(int i=0;i<v1.size();i++){
		int s =0, e = v2.size()- 1, ans = -1;
		while(s <= e){
			int mid = s + (e-s)/2;
			if(v2[mid] + v1[i] <= m){
				s=  mid+1;
				ans= mid;
			}
			else e = mid - 1;
		}
		cnt += ans+1;
	}
	cout << cnt;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:30:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |  for(int i=0;i<v1.size();i++){
      |              ~^~~~~~~~~~

• 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