Submission #1173397

#	Time	Username	Problem	Language	Result	Execution time	Memory
1173397		ezzzay	Feast (NOI19_feast)	C++20	30 / 100	89 ms	21416 KiB

feast

#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define int long long
const int N=4e5;
int dp[N][3][2];
int a[N];
signed main(){
    int n,k;
    cin>>n>>k;
    k=min(k,2ll);
    for(int i=1;i<=n;i++)cin>>a[i];
    for(int i=0;i<N;i++){
        for(int j=0;j<3;j++) {
            dp[i][j][0]= -7e15;
            dp[i][j][1]= -7e15;
        }
    }
    dp[0][0][0]=0;
    dp[0][0][1]=0;
    int ans= 0;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=k;j++){
            
            
            dp[i][j][1] = max( {dp[i][j][1] , dp[i-1][j][1]+a[i] , dp[i-1][j][0]+a[i] ,dp[i-1][j-1][1] +a[i]});
            dp[i][j][0]= max({dp[i][j][0] ,dp[i-1][j][0],dp[i-1][j-1][1]});
            ans=max(ans,dp[i][j][1]);
            
        }
    }
    for(int i=1;i<=n;i++){
        ans=max(ans,dp[i][k][1]);
    }
    cout<<ans;
}

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 18 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29