제출 #1063140

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1063140		EkinOnal	새로운 문제 (POI13_tak)	C++17	0 / 100	81 ms	10364 KiB

tak

//#pragma GCC optimize("O3,unroll-loops,Ofast")
//#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt")
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;
 
#define MAX 200007
#define pb push_back
#define mp make_pair 
#define int long long
#define f first
#define s second
#define vi vector<int>
#define pii pair<int,int>
#define si set<int>
#define vpii vector<pair<int,int>> 
const int mod = 1e9+7;
const int INF = 1e18;
// myMap.begin()->first :  key
// myMap.begin()->second : value
 
int epow(int a,int b){int ans=1;while(b){if(b&1) ans*=a;a*=a;;b>>=1;}return ans;}
int gcd(int a,int b) {if(a<b)swap(a,b);while(b){int tmp=b;b=a%b;a=tmp;}return a;}
int mul(int a,int b){return ((a%mod)*(b%mod))%mod;}
int sum(int a,int b){return ((a%mod)+(b%mod))%mod;}
 
//typedef tree<pii,null_type,less<pii>,rb_tree_tag,tree_order_statistics_node_update>ordered_set;

void solve(){
	int m,d,n; cin>>m>>d>>n;

	vi v(n); for(int i=0;i<n;i++) cin>>v[i];
	sort(v.begin(),v.end(),greater<int>());
	int curr=0,sayi=0;
	for(int i=0;i<n;i++){	
		if(curr<d){
			if(v[i]<=d-curr) break;
			v[i]-=d-curr;
			curr+=v[i];
			sayi++;
			if(curr>=m) break;
		}
		else{
			curr=max(curr,v[i]+d);
			sayi++;
			if(curr>=m) break;
		}
	}

	if(curr>=m) cout<<sayi<<endl;
	else cout<<"0"<<endl;


	return;
}
 
int32_t main() {
//	freopen("hayfeast.in", "r", stdin);
//	freopen("hayfeast.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(0);   
    int t=1;
 //   cin >> t;
    while (t--) solve();
 
    return 0;
}

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