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Submission #476435

# Submission time Handle Problem Language Result Execution time Memory
476435 2021-09-26T20:07:59 Z ogibogi2004 K blocks (IZhO14_blocks) C++14
0 / 100
 1 ms 204 KB 
#include<bits/stdc++.h>
using namespace std;
const int MAXN=1e5+6;
const int MAXK=128;
const int INF=2e9;
int n,k;
int a[MAXN];
int dp[2][MAXN];
int main()
{
    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    dp[1][0]=INF;
    for(int i=1;i<=n;i++)dp[1][i]=max(dp[1][i],a[i]);
    for(int j=2;j<=k;j++)
    {
        stack<pair<int,int> >s;
        dp[j%2][0]=INF;
        dp[1-j%2][0]=INF;
        for(int i=1;i<=n;i++)
        {
            int pr1=dp[1-j%2][i],pr2;
            while(!s.empty()&&a[s.top().second]<=a[i])
            {
                pr1=min(pr1,s.top().first);
                s.pop();
            }
            if(s.empty())pr2=INF;
            else pr2=dp[1-j%2][s.top().second];
            dp[j%2][i]=min(pr1+a[i],pr2);
            s.push({pr1,i});
        }
    }
    cout<<dp[k%2][n]<<endl;
return 0;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -