Submission #462474

#TimeUsernameProblemLanguageResultExecution timeMemory
462474JasiekstrzHolding (COCI20_holding)C++17
110 / 110
106 ms14032 KiB
#include<bits/stdc++.h> #define fi first #define se second using namespace std; const int N=1e2; const int K=1e4; int tab[N+10]; int dp[2][N+10][K+10]; int bck[2][N+10][K+10]; void solve(int n,int x,int k,int t) // x - first inside { for(int j=1;j<=n;j++) { for(int c=0;c<=k;c++) dp[0][j][c]=dp[1][j][c]=0; } for(int i=x-1;i>=1;i--) { for(int j=1;j<=n;j++) { for(int c=0;c<=k;c++) dp[i%2][j][c]=0; } for(int j=x;j<=n;j++) { for(int c=0;c<=k;c++) dp[i%2][j][c]=min(dp[(i+1)%2][j][c],dp[i%2][j-1][c]); for(int c=j-i;c<=k;c++) dp[i%2][j][c]=min(dp[i%2][j][c], dp[(i+1)%2][j-1][c-j+i]+tab[i]-tab[j]); } } for(int i=x;i<=n;i++) { for(int c=0;c<=k;c++) { bck[t][i-x+1][c]=dp[1][i][c]; //cerr<<"type="<<t<<" d="<<i-x+1<<" c="<<c<<" : "<<bck[t][i-x+1][c]<<"\n"; } } return; } int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); int n,l,r,k; cin>>n>>l>>r>>k; for(int i=1;i<=n;i++) cin>>tab[i]; solve(n,l,k,0); reverse(tab+1,tab+n+1); solve(n,n-r+1,k,1); reverse(tab+1,tab+n+1); int ans=0; for(int i=0;i<=r-l+1;i++) { for(int c=0;c<=k;c++) { ans=min(ans,bck[0][i][c]+bck[1][r-l+1-i][k-c]); //cerr<<i<<" "<<c<<" "<<ans<<"\n"; } } for(int i=l;i<=r;i++) ans+=tab[i]; cout<<ans<<"\n"; return 0; }
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