Submission #755681

#	Time	Username	Problem	Language	Result	Execution time	Memory
755681		Fidan	K blocks (IZhO14_blocks)	C++17	0 / 100	132 ms	262144 KiB

blocks

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, a, b) for(ll i=ll(a); i<ll(b); i++)
#define repn(i, a, b) for(ll i=ll(b)-1; i>=ll(a); i--)
#define pb push_back
#define si size()
#define ff first
#define ss second
#define be begin()
#define en end()
const ll N=(1e5)+10;
const ll K=110;
const ll inf=(1e9)+10;
vector<ll> v(N);
vector<ll> x(N, -1);
vector<ll> s;
vector<vector<ll>> dp(N, vector<ll> (K, inf));
vector<vector<ll>> T(K, vector<ll> (4*N, inf));
void upd(ll j, ll in, ll val, ll l, ll r, ll v1){
	if(l==r && r==in){
		T[j][v1]=val;
		return;
	}
	if(l>r) return;
	ll mid=(l+r)/2;
	if(in<=mid){
		upd(j, in, val, l, mid, 2*v1);
	}
	else{
		upd(j, in, val, mid+1, r, 2*v1+1);
	}
	T[j][v1]=min(T[j][2*v1], T[j][2*v1+1]);
}
ll que(ll j, ll l, ll r, ll tl, ll tr, ll v1){
	if(l>r) return inf;
	if(l==tl && r==tr) return T[j][v1];
	ll mid=(tl+tr)/2;
	return min(que(j, l, min(r, mid), tl, mid, 2*v1), que(j, max(mid+1, l), r, mid+1, tr, 2*v1+1));
}
void solve(){
	ll n, k;
	cin>>n>>k;
	rep(i, 1, n+1){
		cin>>v[i];
	}
	rep(i, 1, n+1){
		repn(j, 1, i){
			if(v[j]>v[i]){
				x[i]=j;
				break;
			}
		}
	}
	dp[0][0]=0;
	dp[1][1]=v[1];
	upd(1, 1, dp[1][1], 1, n, 1);
	rep(i, 2, n+1){
		dp[i][1]=max(dp[i-1][1], v[i]);
		upd(1, i, dp[i][1], 1, n, 1);
	}
	rep(i, 2, n+1){
		rep(j, 2, k+1){
			if(i<j){
				upd(j, i, dp[i][j], 1, n, 1);
			}
			else{
				dp[i][j]=v[i]+dp[i-1][j-1];
				if(x[i]==-1){
					dp[i][j]=min(dp[i][j], v[i]+que(j-1, 1, i-1, 1, n, 1));
				}
				else{
					dp[i][j]=min(dp[i][j], v[i]+que(j-1,  x[i]+1, i-1, 1, n, 1));
					dp[i][j]=min(dp[i][j], dp[x[i]][j]);
				}
				upd(j, i, dp[i][j], 1, n, 1);
			}
		}
	}
	cout<<dp[n][k];
}
int main(){
	ios_base::sync_with_stdio();
	cin.tie(0);
	ll t=1;
	//~ cin>>t;
	while(t--){
		solve();
	}
	return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47