結果
| 問題 |
No.1117 数列分割
|
| コンテスト | |
| ユーザー |
rniya
|
| 提出日時 | 2020-07-17 22:59:34 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 4,787 bytes |
| コンパイル時間 | 2,347 ms |
| コンパイル使用メモリ | 188,708 KB |
| 実行使用メモリ | 614,016 KB |
| 最終ジャッジ日時 | 2024-11-30 04:05:51 |
| 合計ジャッジ時間 | 55,242 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 MLE * 2 |
| other | AC * 9 TLE * 9 MLE * 8 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define LOCAL
#pragma region Macros
typedef long long ll;
#define ALL(x) (x).begin(),(x).end()
const long long MOD=1e9+7;
// const long long MOD=998244353;
const int INF=1e9;
const long long IINF=1e18;
const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};
const char dir[4]={'D','R','U','L'};
template<typename T>
istream &operator>>(istream &is,vector<T> &v){
for (T &x:v) is >> x;
return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &v){
for (int i=0;i<v.size();++i){
os << v[i] << (i+1==v.size()?"": " ");
}
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const pair<T,U> &p){
cout << '(' << p.first << ',' << p.second << ')';
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const map<T,U> &m){
os << '{';
for (auto itr=m.begin();itr!=m.end();++itr){
os << '(' << itr->first << ',' << itr->second << ')';
if (++itr!=m.end()) os << ',';
--itr;
}
os << '}';
return os;
}
template<typename T>
ostream &operator<<(ostream &os,const set<T> &s){
os << '{';
for (auto itr=s.begin();itr!=s.end();++itr){
os << *itr;
if (++itr!=s.end()) os << ',';
--itr;
}
os << '}';
return os;
}
void debug_out(){cerr << '\n';}
template<class Head,class... Tail>
void debug_out(Head&& head,Tail&&... tail){
cerr << head;
if (sizeof...(Tail)>0) cerr << ", ";
debug_out(move(tail)...);
}
#ifdef LOCAL
#define debug(...) cerr << " ";\
cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\
cerr << " ";\
debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif
template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;}
template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;}
template<class T1,class T2> inline bool chmin(T1 &a,T2 b){
if (a>b){a=b; return true;} return false;
}
template<class T1,class T2> inline bool chmax(T1 &a,T2 b){
if (a<b){a=b; return true;} return false;
}
#pragma endregion
template<typename Monoid>
struct SegmentTree{
typedef function<Monoid(Monoid,Monoid)> F;
int n;
F f;
Monoid id;
vector<Monoid> dat;
SegmentTree(int n_,F f,Monoid id):f(f),id(id){init(n_);}
void init(int n_){
n=1;
while(n<n_) n<<=1;
dat.assign(n<<1,id);
}
void build(const vector<Monoid> &v){
for (int i=0;i<v.size();++i) dat[i+n]=v[i];
for (int i=n-1;i;--i) dat[i]=f(dat[i<<1|0],dat[i<<1|1]);
}
void update(int k,Monoid x){
dat[k+=n]=x;
while(k>>=1) dat[k]=f(dat[k<<1|0],dat[k<<1|1]);
}
Monoid query(int a,int b){
if (a>=b) return id;
Monoid vl=id,vr=id;
for (int l=a+n,r=b+n;l<r;l>>=1,r>>=1){
if (l&1) vl=f(vl,dat[l++]);
if (r&1) vr=f(dat[--r],vr);
}
return f(vl,vr);
}
// most left position that meets condition "check"
template<typename C>
int find(int a,int b,const C &check,int k,int l,int r){
if (!check(dat[k])||r<=a||b<=l) return -1;
if (l+1==r) return k-n;
int vl=find(a,b,check,k<<1|0,l,(l+r)>>1);
if (~vl) return vl;
return find(a,b,check,k<<1|1,(l+r)>>1,r);
}
template<typename C>
int find(int a,int b,const C &check){
return find(a,b,check,1,0,n);
}
Monoid operator[](int i){return dat[i+n];}
};
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
int N,K,M; cin >> N >> K >> M;
vector<ll> A(N); cin >> A;
vector<ll> sum(N+1,0),comp(N+1),dict(N+1);
for (int i=0;i<N;++i) sum[i+1]=sum[i]+A[i];
for (int i=0;i<N+1;++i) comp[i]=sum[i];
sort(ALL(comp));
map<ll,int> cnt;
for (int i=0;i<N+1;++i){
dict[i]=lower_bound(ALL(comp),sum[i])-comp.begin();
dict[i]+=cnt[sum[i]];
++cnt[sum[i]];
}
auto f=[](ll a,ll b){return max(a,b);};
vector<vector<ll>> dp(N+1,vector<ll>(K+1,-IINF));
vector<SegmentTree<ll>> seg1(K+1,SegmentTree<ll>(N+1,f,-IINF))
,seg2(K+1,SegmentTree<ll>(N+1,f,-IINF));
dp[0][0]=0;
seg1[0].update(dict[0],dp[0][0]-sum[0]);
seg2[0].update(dict[0],dp[0][0]+sum[0]);
for (int i=1;i<=N;++i){
for (int j=0;j<=K;++j){
if (j+1<=K){
chmax(dp[i][j+1],seg1[j].query(0,dict[i])+sum[i]);
chmax(dp[i][j+1],seg2[j].query(dict[i],N+1)-sum[i]);
seg1[j+1].update(dict[i],dp[i][j+1]-sum[i]);
seg2[j+1].update(dict[i],dp[i][j+1]+sum[i]);
}
if (i-M>=0){
seg1[j].update(dict[i-M],-IINF);
seg2[j].update(dict[i-M],-IINF);
}
}
}
cout << dp[N][K] << '\n';
}
rniya