oj.uz

답안 #442089

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
442089 2021-07-07T06:23:00 Z Evirir Feast (NOI19_feast) C++17
30 / 100
 132 ms 14484 KB 
#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 watch(x) cout<<(#x)<<"="<<(x)<<'\n'
#define mset(d,val) memset(d,val,sizeof(d))
#define setp(x) cout<<fixed<<setprecision(x)
#define forn(i,a,b) for(int i=(a);i<(b);i++)
#define fore(i,a,b) for(int i=(a);i<=(b);i++)
#define pb push_back
#define F first
#define S second
#define pqueue priority_queue
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef long double ld;
template<typename T>
using pbds = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
void amin(ll &a, ll b){ a=min(a,b); }
void amax(ll &a, ll b){ a=max(a,b); }
void YES(){cout<<"YES\n";} void NO(){cout<<"NO\n";}
void SD(int t=0){ cout<<"PASSED "<<t<<endl; }
const ll INF = ll(1e18);
const int MOD = 998244353;

const bool DEBUG = 0;
const int MAXN = 300005;

int n,K;
ll a[MAXN];
ll p[MAXN];
ll dp[MAXN], cnt[MAXN];
ii pre[MAXN]; //best dp[j-1]+sum(j..i) for j<=i

ll sum(int l, int r){ return p[r]-(l?p[l-1]:0LL); }

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	
	cin>>n>>K;
	fore(i,1,n)
	{
		cin>>a[i];
		p[i]=p[i-1]+a[i];
	}
	dp[0]=0;
	cnt[0]=0;
	pre[0]={-INF,0};
	
	ll ans=0;
	for(ll L=0,R=1e16;L<=R;)
	{
		ll mid=(L+R)>>1;
		
		fore(i,1,n)
		{
			ii tmp=pre[i-1];
			tmp.F+=a[i];
			pre[i]=max(tmp, {dp[i-1]+a[i]-mid,cnt[i-1]+1});
			if(pre[i].F>=dp[i-1])
			{
				dp[i]=pre[i].F;
				cnt[i]=pre[i].S;
			}
			else
			{
				dp[i]=dp[i-1];
				cnt[i]=cnt[i-1];
			}
		}
		if(cnt[n]>=K)
		{
			ans=dp[n]+min((ll)K,cnt[n])*mid;
			L=mid+1;
		}
		else R=mid-1;
		
		if(0)
		{
			cout<<"mid="<<mid<<'\n';
			cout<<"a: "; fore(i,1,n) cout<<a[i]<<" "; cout<<'\n';
			cout<<"dp: "; fore(i,1,n) cout<<dp[i]<<" "; cout<<'\n';
			cout<<"cnt: "; fore(i,1,n) cout<<cnt[i]<<" "; cout<<'\n';
			cout<<"pre: "; fore(i,1,n) cout<<"("<<pre[i].F<<","<<pre[i].S<<") "; cout<<'\n';
			cout<<"ans: "<<dp[n]+cnt[n]*mid<<"\n\n";
		}
	}
	
	cout<<ans<<'\n';
	
	return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 96 ms 13892 KB Output is correct
2 Correct 104 ms 14132 KB Output is correct
3 Correct 100 ms 14380 KB Output is correct
4 Correct 106 ms 14164 KB Output is correct
5 Correct 97 ms 14124 KB Output is correct
6 Correct 104 ms 13888 KB Output is correct
7 Correct 97 ms 13968 KB Output is correct
8 Correct 115 ms 14132 KB Output is correct
9 Correct 101 ms 13948 KB Output is correct
10 Correct 99 ms 14136 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 87 ms 14032 KB Output is correct
2 Correct 91 ms 14360 KB Output is correct
3 Correct 88 ms 14024 KB Output is correct
4 Correct 88 ms 14088 KB Output is correct
5 Correct 98 ms 13908 KB Output is correct
6 Correct 86 ms 14124 KB Output is correct
7 Correct 92 ms 14484 KB Output is correct
8 Correct 102 ms 14312 KB Output is correct
9 Correct 98 ms 13924 KB Output is correct
10 Correct 87 ms 14292 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 122 ms 14148 KB Output is correct
2 Correct 127 ms 14020 KB Output is correct
3 Correct 118 ms 14148 KB Output is correct
4 Correct 120 ms 14000 KB Output is correct
5 Correct 122 ms 14128 KB Output is correct
6 Correct 123 ms 14176 KB Output is correct
7 Correct 122 ms 14208 KB Output is correct
8 Correct 121 ms 14148 KB Output is correct
9 Correct 122 ms 14356 KB Output is correct
10 Correct 132 ms 14404 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Incorrect 1 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Incorrect 1 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Incorrect 1 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 96 ms 13892 KB Output is correct
2 Correct 104 ms 14132 KB Output is correct
3 Correct 100 ms 14380 KB Output is correct
4 Correct 106 ms 14164 KB Output is correct
5 Correct 97 ms 14124 KB Output is correct
6 Correct 104 ms 13888 KB Output is correct
7 Correct 97 ms 13968 KB Output is correct
8 Correct 115 ms 14132 KB Output is correct
9 Correct 101 ms 13948 KB Output is correct
10 Correct 99 ms 14136 KB Output is correct
11 Correct 87 ms 14032 KB Output is correct
12 Correct 91 ms 14360 KB Output is correct
13 Correct 88 ms 14024 KB Output is correct
14 Correct 88 ms 14088 KB Output is correct
15 Correct 98 ms 13908 KB Output is correct
16 Correct 86 ms 14124 KB Output is correct
17 Correct 92 ms 14484 KB Output is correct
18 Correct 102 ms 14312 KB Output is correct
19 Correct 98 ms 13924 KB Output is correct
20 Correct 87 ms 14292 KB Output is correct
21 Correct 122 ms 14148 KB Output is correct
22 Correct 127 ms 14020 KB Output is correct
23 Correct 118 ms 14148 KB Output is correct
24 Correct 120 ms 14000 KB Output is correct
25 Correct 122 ms 14128 KB Output is correct
26 Correct 123 ms 14176 KB Output is correct
27 Correct 122 ms 14208 KB Output is correct
28 Correct 121 ms 14148 KB Output is correct
29 Correct 122 ms 14356 KB Output is correct
30 Correct 132 ms 14404 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Incorrect 1 ms 332 KB Output isn't correct
33 Halted 0 ms 0 KB -