oj.uz

Submission #730896

# Submission time Handle Problem Language Result Execution time Memory
730896 2023-04-26T15:05:31 Z Hemister K blocks (IZhO14_blocks) C++14
0 / 100
 1 ms 340 KB 
#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define ll long long
#define ldb long double
#define in(x) freopen(x,"r",stdin)
#define out(x) freopen(x,"w",stdout)
#define fo(i,l,r) for(int i=(l);i<=(r);i++)
#define foi(i,l,r) for(int i=(l);i>=(r);i--)
#define el cout<<'\n';
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define gb(x,i) (((x)>>(i))&1)
#define mask(i) (1LL<<(i))
using namespace std;
const int N=2e5+5;
const int bl=450;
const ll base=1e9+7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll Rand(ll l,ll r)
{
    return l+(1ll*rng()*rng()%(r-l+1)+(r-l+1))%(r-l+1);
}
template<class X,class Y>bool maximize(X &a,Y b)
{
    if(a<b) return a=b,true;
    return false;
}
template<class X,class Y>bool minimize(X &a, Y b)
{
    if(a>b) return a=b,true;
    return false;
}
void add(ll &a,ll b)
{
    a+=b;
    if(a>=base) a-=base;
    if(a<0) a+=base;
}
int n,k,h[N],dp[N],g[N],st[4*N],del[4*N],now,vt;
stack<int>ss;
void push(int id)
{
    fo(i,id<<1,id<<1|1) st[i]+=del[id],del[i]+=del[id];
    del[id]=0;
}
void update(int id,int l,int r,int u,int v,int val)
{
    if(l>v||r<u) return;
    if(u<=l&&r<=v)
    {
        st[id]+=val,del[id]+=val;
        return;
    }
    push(id);
    int mid=(l+r)>>1;
    update(id<<1,l,mid,u,v,val),update(id<<1|1,mid+1,r,u,v,val);
    st[id]=min(st[id<<1],st[id<<1|1]);
}
int get(int id,int l,int r,int u,int v)
{
    if(l>v||r<u) return 1e9;
    if(u<=l&&r<=v) return st[id];
    int mid=(l+r)>>1;
    push(id);
    return min(get(id<<1,l,mid,u,v),get(id<<1|1,mid+1,r,u,v));
}
void build(int id,int l,int r)
{
    if(l>r) return;
    if(l==r)
    {
        st[id]=del[id]=0;
        return;
    }
    int mid=(l+r)>>1;
    build(id<<1,l,mid),build(id<<1|1,mid+1,r);
}
int main()
{
    //in("o.inp");
    //out("o.out");
    srand(time(NULL));
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>n>>k;
    fo(i,1,n) cin>>h[i];
    fo(i,1,n) dp[i]=max(dp[i-1],h[i]);
    fo(x,2,k)
    {
        build(1,1,n);
        while(ss.size()) ss.pop();
        fo(i,1,n) g[i]=1e9;
        fo(i,x,n)
        {
            update(1,1,n,i,i,dp[i-1]+h[i]);
            now=i-1;
            while(ss.size()&&h[ss.top()]<=h[i])
            {
                ss.pop();
                if(ss.size()==0) vt=x;
                else vt=ss.top()+1;
                update(1,1,n,vt,now,h[now]-h[vt]);
                now=vt-1;
            }
            ss.push(i),g[i]=get(1,1,n,x,i);
        }
        fo(i,1,n) dp[i]=g[i];
    }
    cout<<dp[n];
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Incorrect 0 ms 340 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Incorrect 1 ms 340 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Incorrect 0 ms 340 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Incorrect 0 ms 340 KB Output isn't correct
8 Halted 0 ms 0 KB -