Submission #889210

#	Time	Username	Problem	Language	Result	Execution time	Memory
889210		CDuong	Visiting Singapore (NOI20_visitingsingapore)	C++17	100 / 100	1037 ms	21332 KiB

VisitingSingapore

/*
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,fma,bmi,bmi2,sse4.2,popcnt,lzcnt")
*/

#include <bits/stdc++.h>
#define taskname ""
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define i64 long long
#define pb push_back
#define ff first
#define ss second
#define isz(x) (int)x.size()
using namespace std;

const int mxN = 2e5 + 5;
const int mod = 1e9 + 7;
const i64 oo = 1e18;

#define For(i, a, b) for(int i = (a); i < (b); ++i)
#define ForE(i, a, b) for(int i = (a); i <= (b); ++i)

int K, n, m, A, B;
int hpn[1005], events[5005], mission[5005];
int dp[5005][5005][2][2], nxt[5005][1005], lst[1005];

int cal(int val) {
    if (val == 0) return 0;
    return A + val * B;
}

void chkmax(int &val, int nval) {
    val = (val < nval ? nval : val);
}

void solve() {
    cin >> K >> n >> m >> A >> B;
    for (int i = 1; i <= K; ++i) cin >> hpn[i];
    for (int i = 1; i <= n; ++i) cin >> events[i];
    for (int i = 1; i <= m; ++i) cin >> mission[i];

    memset(nxt[m + 1], -1, sizeof nxt[0]);
    for (int i = m; i >= 1; --i) {
        for (int j = 1; j <= K; ++j) nxt[i][j] = nxt[i + 1][j];
        nxt[i][mission[i]] = i;
    }

    auto get_new_day = [&]() -> void {
        ForE(i, 0, m) For(cont, 0, 2) For(gotA, 0, 2) {
            dp[1][i][cont][gotA] = INT_MIN;
        }
        dp[1][0][1][1] = 0;
    };

    int res = INT_MIN;
    auto getmax = [&]() -> void {
        ForE(i, 0, m) For(cont, 0, 2) For(gotA, 0, 2) if (dp[0][i][cont][gotA] != INT_MIN) {
            chkmax(res, dp[0][i][cont][gotA] + cal(m - i));
        }
    };

    ForE(i, 0, m) For(cont, 0, 2) For(gotA, 0, 2) {
        dp[0][i][cont][gotA] = INT_MIN;
    }
    dp[0][0][1][0] = 0;
    getmax();

    ForE(day, 0, n) {
        get_new_day();
        ForE(i, 0, m) For(cont, 0, 2) For(gotA, 0, 2) if (dp[0][i][cont][gotA] != INT_MIN) {
            int val = dp[0][i][cont][gotA];
            // cout << day << " " << i << " " << cont << " " << gotA << " " << val << endl;
            if (i && nxt[i + 1][mission[i]] != -1) {
                int ni = nxt[i + 1][mission[i]];
                chkmax(dp[0][ni][1][1], val + (ni - i) * B + (gotA ? 0 : A));
            }
            if (day < n && nxt[i + 1][events[day + 1]] != -1) {
                int ni = nxt[i + 1][events[day + 1]];
                chkmax(dp[1][ni][1][(i + 1 != ni)], val + hpn[events[day + 1]] + cal(ni - i - 1));
            }
            chkmax(dp[1][i][0][gotA], val + (cont ? A + B : B));
        }
        // cout << endl;
        getmax();
        memcpy(dp[0], dp[1], sizeof dp[0]);
        getmax();
    }

    // int res = INT_MIN;
    // ForE(day, 0, n) ForE(i, 0, m) For(cont, 0, 2) if (dp[day][i][cont] != INT_MIN) {
    //     chkmax(res, dp[day][i][cont] + cal(m - i));
    // }
    cout << res << endl;
}

signed main() {

#ifndef CDuongg
    if(fopen(taskname".inp", "r"))
        assert(freopen(taskname".inp", "r", stdin)), assert(freopen(taskname".out", "w", stdout));
#else
    freopen("bai3.inp", "r", stdin);
    freopen("bai3.out", "w", stdout);
    auto start = chrono::high_resolution_clock::now();
#endif

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1; //cin >> t;
    while(t--) solve();

#ifdef CDuongg
   auto end = chrono::high_resolution_clock::now();
   // cout << "\n"; for(int i = 1; i <= 100; ++i) cout << '=';
   // cout << "\nExecution time: " << chrono::duration_cast<chrono::milliseconds> (end - start).count() << "[ms]" << endl;
   // cout << "Check array size pls sir" << endl;
#endif

}

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