Submission #1101609

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101609		huydeptraiso1vutruvn	K blocks (IZhO14_blocks)	C++14	0 / 100	12 ms	86804 KiB

blocks

#include <bits/stdc++.h>
#define fi first
#define se second
#define pii pair<int,int>
#define pb push_back
#define bit(mask,i) ((mask >> i) & 1)
#define mask(i) (1 << (i))
#define lcm(a,b) ((a*b)/__gcd(a,b))
#define turn_on(mask,i) ((mask | (1 << i))
#define turn_off(mask,i) (mask ^ (1 << i))
#define count_1(x) __builtin_popcount(x)
#define faster ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
using namespace std;
const int Base = 37;
const int MOD = 1e9 + 7;
const int nmax = 2 * 1e5;
const int size = 320;
int dx[4] = {-1, 0, 1, 0};
int dy[4] = {0, 1, 0, -1};
int n, k;
int a[nmax + 10], b[nmax + 10][20], l[nmax + 10];
int dp[nmax + 10][105];
 
 
void input()
	{
		cin >> n >> k;
		
		for (int i = 1; i <= n; i++) cin >> a[i];
	}
	
int get(int l , int r)
	{
		int k = __lg(r - l + 1);
		
		return min(b[l][k] , b[r - (1 << k) + 1][k]);
	}
	
void process()
	{
		stack <int> st;
		
		st.push(0);
		
	  a[0] = 1e6 + 1;
		
	  for (int i = 1; i <= n; i++)
	    {
	      while ( a[st.top()] <= a[i]) st.pop();
	      
	       l[i] = st.top();
	      
	      st.push(i);
	    }
	   
	  memset(dp , 0x3f , sizeof(dp));
		
		dp[0][0] = 0;
		
		for (int j = 1; j <= k; j++)
		  {
		    for (int i = 0; i <= n; i++) b[i][0] = dp[i][j - 1];
		
		    for (int k = 1; (1 << k) <= n + 1; k++)
			    {
				    for (int i = 0; i + (1 << k) - 1 <= n; i++)
					    {
						    b[i][k] = min(b[i][k - 1] , b[i + (1 << (k - 1))][k - 1]);
					    }
		      }
		    
		    for (int i = 1; i <= n; i++)
		      {
		        dp[i][j] = min(dp[i][j] , get(l[i] , i - 1) + a[i]);
		        dp[i][j] = min(dp[i][j] , dp[i][l[j]]);
		      }
		  }
		  
		cout << dp[n][k];
	}
	
signed main()
	{
		faster
		
		// freopen ("TASK.INP", "r", stdin);
		// freopen ("TASK.OUT", "w", stdout);
		
		input();
		
		process();
		
	}

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