Submission #885091

#	Time	Username	Problem	Language	Result	Execution time	Memory
885091		vjudge1	K blocks (IZhO14_blocks)	C++17	100 / 100	106 ms	1924 KiB

blocks

#include<bits/stdc++.h>

using namespace std;

#define read() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define day() time_t now = time(0);char* x = ctime(&now);cerr<<"Right Now Is : "<<x<<"\n"

#define ii pair<int,int>
#define X first
#define Y second 

const long long MAX = (int)1e5 + 5;
const long long INF = (int)1e9;
const long long MOD = (int)1e9 + 7;

int n,k;
int a[MAX];
int dp[2][MAX];
signed main(){
	
	read();
	
	cin >> n >> k;
	
	int bit = 0;
	for(int i = 1;i <= n;i++){
		cin >> a[i];
		dp[bit][i] = INF;
	}

	for(int j = 1;j <= k;j++){
		bit = 1 - bit;
		stack<ii> st;
		for(int i = 1;i <= n;i++){
			
			if(j > i)continue;
			int summ = dp[1 - bit][i - 1];
 		
 			//cout << summ << " :\n";
			while(!st.empty() && a[st.top().X] <= a[i]){
				//cout << st.top().Y << " " << st.top().X << "A\n";
				summ = min(summ,st.top().Y);
				st.pop();
			}
			//cout << summ << "\n";
			
			if(st.empty() || a[st.top().X] + st.top().Y > a[i] + summ){
				st.push({i,summ});
			}
			
			if(i >= j){
				//cout << st.top().X << " " << st.top().Y << '\n';
				dp[bit][i] = a[st.top().X] + st.top().Y;
			}
			//cout << dp[bit][i] << " ";
		}
		
		for(int i = 0;i <= n;i++){
			dp[1 - bit][i] = INF;
		}
		//cout << "\n";
	}
	
	cout << dp[bit][n];
	
}

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