Submission #887047

#TimeUsernameProblemLanguageResultExecution timeMemory
887047vjudge1Visiting Singapore (NOI20_visitingsingapore)C++14
100 / 100
326 ms196604 KiB
#include<bits/stdc++.h> using namespace std; // struct FenwickTree2d{ // int n, m; // vector<vector<int>> t; // void init(int _n, int _m){ // n=_n+1; m=_m+1; // vector<vector<int>>(n+1, vector<int>(m+1, -1e9)).swap(t); // } // void update(int x, int y, int val){ // ++x; ++y; // for (int i=x; i<=n; i+=i&(-i)) for (int j=y; j<=m; j+=j&(-j)) t[i][j]=max(t[i][j], val); // } // int get(int x, int y){ // ++x; ++y; // int ans=-1e9; // for (int i=x; i; i-=i&(-i)) for (int j=y; j; j-=j&(-j)) ans=max(ans, t[i][j]); // return ans; // } // } bit2d; const int N=5001; int n, m, A, B, k, v[N], s[N], t[N], f[2][N], r[2][N], c[N][N], mx[N][N]; int32_t main(){ ios_base::sync_with_stdio(false); cin.tie(nullptr); for (int i=0; i<2; ++i) for (int j=0; j<N; ++j) f[i][j]=-1e9, r[i][j]=-1e9; for (int i=0; i<N; ++i) for (int j=0; j<N; ++j) c[i][j]=mx[i][j]=-1e9; cin >> k >> n >> m >> A >> B; for (int i=1; i<=k; ++i) cin >> v[i]; for (int i=1; i<=n; ++i) cin >> s[i]; for (int i=1; i<=m; ++i) cin >> t[i]; // bit2d.init(m, n); for (int j=0; j<=n; ++j){ f[0][j]=0; r[0][j]=f[0][j]-B*j; c[0][j]=f[0][j]; mx[0][j]=-B*j; // bit2d.update(0, j, -B*j); } for (int i=0; i<2; ++i) for (int j=1; j<=n; ++j){ r[i][j]=max(r[i][j], r[i][j-1]); } for (int i=1; i<=m; ++i) for (int j=0; j<=n; ++j){ c[i][j]=max(c[i][j], c[i-1][j]); } for (int i=1; i<=n; ++i) mx[0][i]=max(mx[0][i], mx[0][i-1]); for (int i=1; i<=m; ++i) mx[i][0]=max(mx[i][0], mx[i-1][0]); int ans=A+B*m; for (int i=1; i<=m; ++i){ for (int j=1; j<=n; ++j){ if (s[j]==t[i]){ if (i>=2 && j>=2) f[1][j]=max(f[1][j], mx[i-2][j-2]+A+A+B*(i-1)+B*(j-1)+v[t[i]]); if (i>=2) f[1][j]=max(f[1][j], c[i-2][j-1]+A+B*(i-1)+v[t[i]]); if (j>=2) f[1][j]=max(f[1][j], r[0][j-2]+A+B*(j-1)+v[t[i]]); f[1][j]=max(f[1][j], f[0][j-1]+v[t[i]]); mx[i][j]=max(mx[i][j], f[1][j]-B*i-B*j); if (i!=m) ans=max(ans, f[1][j]+A+B*(m-i)); else ans=max(ans, f[1][j]); } mx[i][j]=max({mx[i][j], mx[i-1][j], mx[i][j-1]}); r[1][j]=max({r[1][j], r[1][j-1], f[1][j]-B*j}); c[i][j]=max({c[i][j], c[i-1][j], f[1][j]-B*i}); } memcpy(f[0], f[1], sizeof f[1]); memcpy(r[0], r[1], sizeof r[1]); for (int j=0; j<=n; ++j) f[1][j]=-1e9, r[1][j]=-1e9; } cout << ans; return 0; }
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