oj.uz

Submission #523085

# Submission time Handle Problem Language Result Execution time Memory
523085 2022-02-07T03:00:22 Z lobo_prix Feast (NOI19_feast) C++17
41 / 100
 1000 ms 17844 KB 
//[Author]   tuxedcat
//[Date]     2022.02.07
//[File]     src/feast.cpp
//[Library]  https://github.com/tuxedcat/pslib
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define _EXT_CODECVT_SPECIALIZATIONS_H 1
#define _EXT_ENC_FILEBUF_H 1
#include <bits/extc++.h>
using namespace std;

// #define int i64
#define FP_EPS 1e-1
#define COUT_FP 11
using f64=long double; //long double(살짝느림),__float128(매우느림)
//#define CPP20 1
#define DBG_SETW 3
#define endl '\n' //remove it when interactive

#define fi first
#define se second
#define mkp make_pair
#define mkt make_tuple
#define lb lower_bound
#define ub upper_bound
#define bs binary_search
#define itos to_string
#define head(x) (x.begin())
#define tail(x) prev(x.end())
#define dbg(...) void(0)
#define dbgif(...) void(0)
#define dbg1(...) void(0)
#define dbg1if(...) void(0)
using i64=long long;using u64=unsigned long long;using u32=unsigned;
using pint=pair<int,int>;using tint=tuple<int,int,int>;
template<class T>using Str=basic_string<T>;
template<class T,class CMP=greater<>>using PQ=std::priority_queue<T,vector<T>,CMP>;
//functions before include <arr.h>

//Math
#if !(CPP20)
	#define countl_zero(x) __builtin_clzll(x)
	#define popcount(x) __builtin_popcountll(x)
	#define bit_ceil(x) 1<<clg2(x)
#endif
template<class T>int sz(const T& x){return x.size();}
int fdiv(int a,int b){if(b<0)a=-a,b=-b;return (a>0)?a/b:(a-b+1)/b;}
int cdiv(int a,int b){if(b<0)a=-a,b=-b;return (a>0)?(a+b-1)/b:a/b;}
i64 flg2(u64 x){return 63-countl_zero(x);}
i64 clg2(u64 x){return 64-countl_zero(x-1);}
int fsqrt(i64 n) {i64 i=1;while(i*i<=n)i++;return i-1;}
int csqrt(i64 n) {i64 i=1;while(i*i<n)i++;return i;}
template<class T>T sq(T x){return x*x;}
template<class T>constexpr T inf(){return numeric_limits<T>::max()/2;}
template<class T>constexpr T nan(){return inf<T>()+1;}
#ifdef CPP20
template<typename T> concept MemberInf=requires(T t){t.inf();};
template<typename T> concept MemberNan=requires(T t){t.nan();};
template<MemberInf T>T inf(){return T().inf();}
template<MemberNan T>T nan(){return T().nan();}
#endif

//IO & misc
template<class...A>void print(A...a){((cout<<a),...);}
template<class...A>void println(A...a){((cout<<a),...,(cout<<endl));}
template<class T=int>T input(){T x;cin>>x;return x;}
template<class T,class U>bool assmin(T& a,U&& b){return a>b?a=b,true:false;}
template<class T,class U>bool assmax(T& a,U&& b){return a<b?a=b,true:false;}
void MUST(bool expr){
#if DEBUG
	#include <csignal>
	if(!expr)
		raise(SIGINT);
#endif
}
#define ARG(...) __VA_ARGS__
#define func(RetT,fname,...) function<RetT(__VA_ARGS__)> fname=[&](__VA_ARGS__)->RetT
#define lam(expr,...) [&](__VA_ARGS__){return expr;}
#define lamp(expr,...) [](__VA_ARGS__){return expr;}

template<class T, class P=vector<T>>
struct Arr:public P{
	Arr(){P::shrink_to_fit();}
	explicit Arr(signed n):P(n){}
	explicit Arr(signed n,T init):P(n,init){}
	Arr(initializer_list<T>il):P(il){}
	Arr(auto its, auto ite):P(its,ite){}
	inline T& operator[](signed i){
		int n=sz(*this);
		if(i<0)i+=n,dbg1("Neg Index Found");
		if(i>=n)i-=n,dbg1("Over Index Found");
		return P::operator[](i);
	}
	const T& operator[](signed i)const{	
		int n=sz(*this);
		if(i<0)i+=n,dbg1("Neg Index Found");
		if(i>=n)i-=n,dbg1("Over Index Found");
		return P::operator[](i);
	}
	T& at(signed i){return *this[i];}
	const T& at(signed i)const{return *this[i];}
};
template<class... A> auto ARR(auto n,A&&... a)
{if constexpr(!sizeof...(a)) return n; else return Arr(n,ARR(a...));}

//Consts
// const f64 pi=numbers::pi_v<f64>,eps=FP_EPS;
const f64 pi=acos(-1),eps=FP_EPS;
const int dir[4][2]={{1,0},{0,1},{-1,0},{0,-1}};
//functions after include <arr.h>

template<class T>int argmin(const Arr<T>& a){return min_element(a.begin(),a.end())-a.begin();}
template<class T>int argmax(const Arr<T>& a){return max_element(a.begin(),a.end())-a.begin();}
Arr<int> permuinv(const Arr<int>& a){Arr<int> r(sz(a));for(int i=0;i<sz(a);i++)r[a[i]]=i;return r;}
template<class T>map<T,Arr<int>> classify(const Arr<T>& a){
	map<T,Arr<int>> r;
	for(int i=0;i<sz(a);i++)
		r[a[i]].push_back(i);
	return r;
}

//Pre-runs
#if !(DEBUG)
auto __PR1=(ios::sync_with_stdio(0),cin.tie(0),cout.tie(0));
#endif
auto& __PR2=(cout<<fixed<<setprecision(COUT_FP));
//

const int N=300000;
int n,k;
int a[N];
i64 f(i64 x){
	auto dp=ARR(n+1,2,-inf<i64>());
	dp[-1][0]=0;
	for(int i=0;i<n;i++){
		assmax(dp[i][0],max(dp[i-1][0],dp[i-1][1]));
		assmax(dp[i][1],max(dp[i-1][0]+a[i]-x,dp[i-1][1]+a[i]));
	}
	return max({0ll,dp[n-1][0],dp[n-1][1]})+x*k;
}

void solve(){
	cin>>n>>k;
	for(int i=0;i<n;i++)cin>>a[i];
	i64 s=0,e=inf<i64>()/k;
	while(e-s>2){
		i64 m1=(s*2+e)/3,m2=(s+e*2)/3;
		if(f(m1)>f(m2)) s=m1;
		else e=m2;
	}
	println(min({f(s),f(s+1),f(e)}));
}
signed main(){
	// int ti=0,t;cin>>t;
	// while(++ti<=t)
	// 	cout<<"Case #"<<ti<<": ",
		solve();
}

Compilation message

feast.cpp:87:6: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   87 |  Arr(auto its, auto ite):P(its,ite){}
      |      ^~~~
feast.cpp:87:16: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   87 |  Arr(auto its, auto ite):P(its,ite){}
      |                ^~~~
feast.cpp:103:31: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
  103 | template<class... A> auto ARR(auto n,A&&... a)
      |                               ^~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1087 ms 17588 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1088 ms 17732 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1079 ms 17844 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 2 ms 316 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 320 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 2 ms 316 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 320 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 3 ms 324 KB Output is correct
13 Correct 5 ms 320 KB Output is correct
14 Correct 3 ms 332 KB Output is correct
15 Correct 3 ms 324 KB Output is correct
16 Correct 3 ms 324 KB Output is correct
17 Correct 3 ms 332 KB Output is correct
18 Correct 3 ms 332 KB Output is correct
19 Correct 3 ms 332 KB Output is correct
20 Correct 3 ms 340 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 2 ms 316 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 320 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 3 ms 324 KB Output is correct
13 Correct 5 ms 320 KB Output is correct
14 Correct 3 ms 332 KB Output is correct
15 Correct 3 ms 324 KB Output is correct
16 Correct 3 ms 324 KB Output is correct
17 Correct 3 ms 332 KB Output is correct
18 Correct 3 ms 332 KB Output is correct
19 Correct 3 ms 332 KB Output is correct
20 Correct 3 ms 340 KB Output is correct
21 Correct 16 ms 332 KB Output is correct
22 Correct 16 ms 336 KB Output is correct
23 Correct 15 ms 332 KB Output is correct
24 Correct 17 ms 328 KB Output is correct
25 Correct 17 ms 332 KB Output is correct
26 Correct 16 ms 332 KB Output is correct
27 Correct 16 ms 332 KB Output is correct
28 Correct 16 ms 332 KB Output is correct
29 Correct 16 ms 332 KB Output is correct
30 Correct 18 ms 460 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1087 ms 17588 KB Time limit exceeded
2 Halted 0 ms 0 KB -