Submission #1248127

#	Time	Username	Problem	Language	Result	Execution time	Memory
1248127		nguthianmangcay	K blocks (IZhO14_blocks)	C++20	53 / 100	1071 ms	2656 KiB

blocks

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+3;
const int K=105;
const long long inf=1e18+3;
#define ll long long
#define fi first
#define se second
#define pi pair
ll dp[K][N];
int a[N];
void jiangly()
{
    int n,k;
    cin>>n>>k;
    for(int i=1;i<=n;i++)cin>>a[i];
    for(int i=0;i<=k;i++)
    {
        for(int j=1;j<=n;j++)
        {
            dp[i][j]=inf;
        }
    }
    dp[0][0]=0;
    dp[1][1]=a[1];
    for(int t=1;t<=k;t++)
    {
        for(int i=t;i<=n;i++)
        {
            int ma=0;
            for(int j=i;j>=t;j--)
            {
                ma=max(ma,a[j]);
                dp[t][i]=min(dp[t][i],dp[t-1][j-1]+ma);
            }
        }
    }
    cout<<dp[k][n];
}
int main()
{
    cin.tie(0)->sync_with_stdio(0);
    if(fopen("QUANSENSEI.inp","r"))
    {
        freopen("O(0).inp","r",stdin);
    }
    jiangly();
}

Compilation message (stderr)

blocks.cpp: In function 'int main()':
blocks.cpp:45:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |         freopen("O(0).inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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