Submission #490882

#	Time	Username	Problem	Language	Result	Execution time	Memory
490882		KienTran	Visiting Singapore (NOI20_visitingsingapore)	C++14	23 / 100	180 ms	262148 KiB

VisitingSingapore

#include <bits/stdc++.h>

using namespace std;

const int O = 5e3 + 5;
const int inf = 1e9;

int k, n, m, a, b, v[O], s[O], t[O], f[2][O][O], dp[O][O];

main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    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];

    for (int i = 0; i <= n; ++ i){
        for (int j = 1; j <= m; ++ j){
            f[0][i][j] = -inf;
            f[1][i][j] = -inf;
        }
    }
    for (int j = 0; j <= m; ++ j) dp[0][j] = b * j;

    dp[0][0] = -inf;
    f[0][0][0] = f[1][0][0] = 0;
    for (int i = 1; i <= n; ++ i){
        for (int j = 1; j <= m; ++ j){
            f[0][i][j] = max(f[0][i - 1][j] + b, f[1][i - 1][j] + a + b);
            if (s[i] == t[j]) f[1][i][j] = max({dp[i - 1][j - 1] + a, f[0][i - 1][j - 1], f[1][i - 1][j - 1]}) + v[s[i]];
        }

        dp[i][0] = -inf;
        for (int j = 1; j <= m; ++ j)
            dp[i][j] = max({dp[i][j - 1], f[1][i][j - 1], f[0][i][j - 1]}) + b;
    }

    int res = a + b * m;
    for (int i = 0; i <= n; ++ i){
        for (int j = 0; j <= m; ++ j){
            int cost = max(f[0][i][j], f[1][i][j]) + a + b * (m - j);
            if (j == m) cost -= a;
            res = max(res, cost);
        }
    }

    cout << res;
}

Compilation message (stderr)

VisitingSingapore.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main(){
      | ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 6 / 6
• Subtask 3: 0 / 12
• Subtask 4: 0 / 7
• Subtask 5: 0 / 8
• Subtask 6: 13 / 13
• Subtask 7: 0 / 50