제출 #166660

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
166660		muhi1112	San (COCI17_san)	C++17	0 / 120	1080 ms	376 KiB

san

#include <bits/stdc++.h>
using namespace std;
 
#define endl '\n'
#define f1 first
#define s2 second
#define pb push_back
#define mp make_pair
#define ll long long
#define fri(a) freopen(a,"r",stdin);
#define fro(a) freopen(a,"w",stdout);
const int N=45;

ll n,k,height[N],val[N],ans;
vector<ll>v[N];

ll solve(int i,int m){
	if(v[i].empty()){
		if(m>=k)return 1;
		return 0;
	}
	ll ans=0;
	for(auto j:v[i]){
		ans+=solve(j,m+val[j]);
	}
	if(m>=k)return ans+1;
	return ans;
}

int main(){
	//fri("in.txt");
	//fro("out.txt");
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n>>k;
	for(int i=0;i<n;i++){
		cin>>height[i]>>val[i];
	}
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(height[j]>=height[i]){
				v[i].pb(j);
			}
		}
	}
	for(int i=0;i<n;i++){
		ans+=solve(i,val[i]);
	}
	cout<<ans<<endl;
return 0;
}

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