Submission #1327641

#	Time	Username	Problem	Language	Result	Execution time	Memory
1327641		ozner77	Feast (NOI19_feast)	C++17	71 / 100	1095 ms	2552 KiB

feast

#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main(){
    ll caca,k;
    cin>>caca>>k;
    vector<ll> V;
    ll xd;
    cin>>xd;
    ll suma=max(xd,0ll);
    for(int i=1;i<caca;i++){
        ll a;
        cin>>a;
        if(a<0 && xd<0){
            xd+=a;
        }else if(a>0 && xd>0){
            xd+=a;
        }else{
            V.push_back(xd);
            xd=a;
        }
        if(a>0){
            suma+=a;
        }
    }
    V.push_back(xd);
    ll con=0;
    for(int i=0;i<V.size();i++){
        if(V[i]>0)con++;
    }
    if(k>=con){
        cout<<suma<<"\n";
        return 0;
    }
    ll n=V.size();
    vector<ll> dp(k+1),dp2(k+1);
    for(int i=0;i<=k;i++){
        dp[i]=0;
        dp2[i]=-1e18;
    }
    for(int i=0;i<n;i++){
        for(int j=k;j>=1;j--){
            dp2[j]=max(dp2[j]+V[i],dp[j-1]+V[i]);
            dp[j]=max(dp2[j],dp[j]);
        }
    }
    cout<<dp[k]<<"\n";
}

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