Submission #615479

#	Time	Username	Problem	Language	Result	Execution time	Memory
615479		MadokaMagicaFan	Dungeons Game (IOI21_dungeons)	C++17	50 / 100	7047 ms	455696 KiB

dungeons

#include "bits/stdc++.h"

using namespace std;

using ll = long long;
const ll inf = 1e9;
using vi = vector<int>;
using ai = array<ll, 2>;

#define sz(v)                       ((int)v.size())
#define pb                          push_back

#define pry                         cout << "YES\n"
#define prn                         cout << "NO\n"
#define endl                        '\n'

#define fst                         first
#define scn                         second
/* #define ONPC */

const int K = 27;

vector<array<array<ll, 3>, 27>> j;
vector<array<ai, 27>> f;
vector<ll> d;

vi s, p, w, l;

int n;

void
init(int _n, vi _s, vi _p, vi _w, vi _l)
{
    n = _n;
    s = _s;
    p = _p;
    w = _w;
    l = _l;
    j.assign(n+1,{{}});
    f.assign(n+1,{{}});
    d.assign(n+1, 0);

    s.pb(0);
    p.pb(0);
    l.pb(n);
    w.pb(n);

    f[n][0] = {n,0};
    j[n][0] = {n,0,0};
    for (int i = n-1; i >= 0; --i) {
        d[i] = d[w[i]] + s[i];
        f[i][0] = {w[i], d[i]+s[i]};
        j[i][0] = {l[i], p[i], s[l[i]] - p[i]};
    }

    for (int k = 1; k < K; ++k) {
        for (int i = 0; i <= n; ++i) {
            f[i][k][0] = f[f[i][k-1][0]][k-1][0];
            f[i][k][1] = max(f[i][k-1][1], f[f[i][k-1][0]][k-1][1]);

            j[i][k][0] = j[j[i][k-1][0]][k-1][0];
            j[i][k][1] = j[i][k-1][1] + j[j[i][k-1][0]][k-1][1];
            j[i][k][2] = min(j[i][k-1][2], j[j[i][k-1][0]][k-1][2]-j[i][k-1][1]);
        }
    }

    return;
}

ll
simulate(int x, int _z)
{
    ll z = _z;

    while (x < n) {
        /* cout << x << ' ' << z << ' ' << s[x] << endl; */
        if (z >= s[x]) {
            for (int k = K-1; k >= 0; --k) {
                if (z + d[x] >= f[x][k][1]) {
                    z += d[x];
                    x = f[x][k][0];
                    z -= d[x];
                }
            }
            /* z += s[x]; */
            /* x = w[x]; */
        } else {
            for (int k = K-1; k >= 0; --k) {
                if (z < j[x][k][2])
                {
                    z += j[x][k][1];
                    x = j[x][k][0];
                }
            }

            z += p[x];
            x = l[x];
        }
    }

    assert(x == n);
    return z;
}


#ifdef ONPC
void
solve()
{
    int n, q;
    cin >> n >> q;
    vector<int> s(n), p(n), w(n) ,l(n);
    for (int i = 0; i < n; ++i) cin >> s[i];
    for (int i = 0; i < n; ++i) cin >> p[i];
    for (int i = 0; i < n; ++i) cin >> w[i];
    for (int i = 0; i < n; ++i) cin >> l[i];

    init(n,s,p,w,l);

    int z, x;
    while (q--) {
        cin >> x >> z;
        cout << simulate(x,z) << endl;
    }
}

int32_t
main(int argc, char **argv)
{
    if (argc >= 2) {
        freopen(argv[1], "r", stdin);
    } else
        ios_base::sync_with_stdio(0);cin.tie(0);
    int t = 1;
    /* cin >> t; */
    while(t--)
        solve();
}
#endif

• Subtask 1: 11 / 11
• Subtask 2: 26 / 26
• Subtask 3: 13 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 27
• Subtask 6: 0 / 11