Submission #966191

#TimeUsernameProblemLanguageResultExecution timeMemory
966191happy_nodeSightseeing in Kyoto (JOI22_kyoto)C++17
10 / 100
4 ms8284 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int MX=1005; int H,W; ll dp[MX][MX]; int main() { cin.tie(0); ios_base::sync_with_stdio(0); cin>>H>>W; vector<ll> A(H),B(W); for(int i=0;i<H;i++) cin>>A[i]; for(int i=0;i<W;i++) cin>>B[i]; vector<pair<ll,ll>> a, b; { vector<bool> C(H); int mn=2e9; for(int i=0;i<H;i++) { if(mn>A[i]) { mn=A[i]; C[i]=1; } } mn=2e9; for(int i=H-1;i>=0;i--) { if(mn>A[i]) { mn=A[i]; C[i]=1; } } int lst=0; for(int i=0;i<H;i++) if(C[i]) { a.push_back({A[i],i-lst}); lst=i; } } { vector<bool> C(W); int mn=2e9; for(int i=0;i<W;i++) { if(mn>B[i]) { mn=B[i]; C[i]=1; } } mn=2e9; for(int i=W-1;i>=0;i--) { if(mn>B[i]) { mn=B[i]; C[i]=1; } } int lst=0; for(int i=0;i<W;i++) if(C[i]) { b.push_back({B[i],i-lst}); lst=i; } } H=a.size(); W=b.size(); for(int i=0;i<=H;i++) { for(int j=0;j<=W;j++) { dp[i][j]=2e18; } } dp[0][0]=0; for(int i=0;i<H;i++) { for(int j=0;j<W;j++) { if(i+1<H) dp[i+1][j]=min(dp[i+1][j],dp[i][j]+b[j].first*a[i+1].second); if(j+1<W) dp[i][j+1]=min(dp[i][j+1],dp[i][j]+a[i].first*b[j+1].second); } } cout<<dp[H-1][W-1]<<'\n'; }
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