Submission #602385

#	Time	Username	Problem	Language	Result	Execution time	Memory
602385		Doanxem99	K blocks (IZhO14_blocks)	C++14	53 / 100	41 ms	87268 KiB

blocks

//Link :
//Author: Nguyen Dinh Manh
#include <bits/stdc++.h>
using namespace std;
#define timing  "Time collapse : " << fixed << setprecision(3) << 1.000 * clock() / CLOCKS_PER_SEC
#define int long long
#define ar array< int , 2>
#define MASK(i) (1 << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
#define task ""
template<typename T1, typename T2> bool minN(T1 &a, T2 b) {if (a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2> bool maxX(T1 &a, T2 b) {if (a < b) a = b; else return 0; return 1;}
const int MAX = 100011, INFL = 1e9 + 7, INFLL = 1e18 + 7;
int n, f[MAX][111], a[MAX], k;
int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //freopen(task".inp","r", stdin); freopen(task".out","w",stdout);
    cin >> n >> k;
   	for (int i = 1; i <= n; i++)
   	{
   		cin >> a[i];
   	}
   	memset(f, 0x3f, sizeof f);
   	f[1][0] = 0;
   	for (int i = 1; i <= n; i++)
   		minN(f[1][i], max(f[1][i - 1], a[i]));
   	for (int i = 2; i <= k; ++i)
   	{
   		stack< ar > s;
   		for (int j = i; j <= n; ++j)
   		{
   			int minF = f[i - 1][j - 1];
   			while (!s.empty() && a[s.top()[1]] <= a[j]) 
   				{
   					minN(minF, s.top()[0]);
   					s.pop();
   				}
   			f[i][j] = min(f[i][(s.empty() ? 0 : s.top()[1])], minF + a[j]);
   			s.push({minF, j});
   		}
   		//for (int j = 1; j <= n; j++) cout << f[i][j] << " \n"[j == n];
   	}
   	cout << f[k][n] ;
}

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