Submission #100809

#	Time	Username	Problem	Language	Result	Execution time	Memory
100809		Scayre	K blocks (IZhO14_blocks)	C++14	53 / 100	1069 ms	1708 KiB

blocks

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//         INFO          //
//                       //
//    Handle -> Scayre   //
//                       //
//   Template vers. 1.7  //
//                       //
//   It'll be accepted   //
//                       //
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//████╗═══██║══════███████║══██║═╚═╝═██║███████╗═════//

#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <complex>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <cassert>
#include <iomanip>
#include <iostream>
#include <algorithm>

#define ll long long
#define ld long double
#define ull unsigned ll
#define ioi exit(0);

#define f first
#define s second

#define inf (int)1e9 + 7

#define NFS ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);

#define mp(x,y) make_pair(x,y)

#define lb(x) lower_bound(x)
#define ub(x) upper_bound(x)

#define pb push_back
#define ppb pop_back

#define bitcoin __builtin_popcount

#define endl "\n"

#define in(x) insert(x)

#define sz(x) (int)x.size()

#define all(x) x.begin(),x.end()

#define pw2(x) (1<<x) //2^x

#define forit(it,v) for (typeof(v.begin()) it = v.begin(); it != v.end(); ++it)

#define sqr(x) ((x) * 1ll * (x))

#define UpdateRandom srand (time(NULL));

using namespace std;

const int N = (int)1e5 + 7, MOD = (int)1e9 + 7;

int n,k;

int a[N];

bool was[N][102];

ll dp[N][102];

ll t[4*N];

void build(int v,int l,int r){
	if(l==r){
		t[v]=a[l];
		return;
	}
	int md=(l+r)/2;
	build(v+v,l,md);
	build(v+v+1,md+1,r);
	t[v]=max(t[v+v],t[v+v+1]);
}

ll mx(int v,int l,int r,int L,int R){
	if(r<L || l>R){
		return 0;
	}
	if(L<=l && R>=r){
		return t[v];
	}
	int md=(l+r)/2;
	return max(mx(v+v,l,md,L,R),mx(v+v+1,md+1,r,L,R));
}

ll calc(int x,int y=0){
	if(y==k-1){
		return mx(1,1,n,x,n);
	}
	if(dp[x][y]!=0)return dp[x][y];
	int mx=0;
	dp[x][y]=inf;
	//cout << n-k+y << endl;
	for(int i=x;i<=((n-k+1)+y);i++){
		mx=max(mx,a[i]);
		dp[x][y]=min(dp[x][y],calc(i+1,y+1)+mx);
	}
	return dp[x][y];
}

int main(){

	#ifdef IOI2019
		freopen ("in.txt", "r", stdin);
	#endif

	NFS

	cin >> n >> k;

	for(int i=1;i<=n;i++){
		cin >> a[i];
	}

	build(1,1,n);

	cout << calc(1) << endl;

	#ifdef IOI2019
		cout << "\nTime Elapsed : " << clock () * 1.0 / CLOCKS_PER_SEC << endl;
	#endif

	ioi
}

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