Submission #238525

#	Time	Username	Problem	Language	Result	Execution time	Memory
238525		Pbezz	Feast (NOI19_feast)	C++14	30 / 100	1090 ms	8824 KiB

feast

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

#define loop(i,n) for (ll i = 0; i < n; i++)

#define ll long long
#define INF 1e9+5
#define MAXN 300007
#define pb push_back 
#define mp make_pair
typedef pair<ll,ll> pii;

ll n,k;
vector<ll>dp(MAXN);//de 1 a n

ll siga(ll pos, ll left){
//retornar o best que posso fazer
//usei até pos-1

	if(pos==n+1)return 0;
	if(left==0)return 0;

	ll i,ret=0,k,gains;

	k=siga(pos+1,left);
	ret=max(ret,k);

	for(i=pos+1;i<=n;i++){//usar até i

	gains=dp[i]-dp[pos-1];

	k = siga(i+1,left-1)+gains;

	ret=max(ret,k);

	k = siga(i+1,left);
	ret=max(ret,k);


}

	return ret;

}


int main(){

	ll i,ans,count=0,mini,x;
	cin>>n>>k;

	vector<ll>a(n+1);

	for(i=1;i<=n;i++){
	cin>>a[i];

	if(a[i]<0){count++; mini=i;}

	dp[i]=dp[i-1]+a[i];

}

	if(count==0){
	ans=dp[n];
	}else if(count==1){

	if(k>=2)ans=dp[n]-a[mini];
	else{
	x=dp[n]-dp[mini];
	ans=max(dp[n], max(dp[mini-1], x));
	}

	}else if(k==1){//clássico maximum sum subarray

	ans=0;
	vector<ll>bruh(n+1);

	for(i=1;i<=n;i++){

	bruh[i]=max(bruh[i-1],(ll int)0)+a[i];
	ans=max(ans,bruh[i]);
}

	}else{//bruteforce básico

	ans=siga(1,k);

}

	printf("%lld\n",ans);

return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 18 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29