Submission #1230681

#	Time	Username	Problem	Language	Result	Execution time	Memory
1230681		thieunguyenhuy	Rainforest Jumps (APIO21_jumps)	C++20	0 / 100	10 ms	23904 KiB

jumps

#ifndef hwe
    #include "jumps.h"
#endif

#include <bits/stdc++.h>
using namespace std;

#define POPCOUNT(n) (__builtin_popcountll((n)))
#define CLZ(n) (__builtin_clzll((n)))
#define CTZ(n) (__builtin_ctzll((n)))
#define LOG(n) (63 - __builtin_clzll((n)))
#define BIT(n, i) (((n) >> (i)) & 1ll)
#define MASK(i) (1ll << (i))
#define FLIP(n, i) ((n) ^ (1ll << (i)))
#define ON(n, i) ((n) | MASK(i))
#define OFF(n, i) ((n) & ~MASK(i))

#define Int __int128
#define fi first
#define se second

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long long, int> pli;
typedef pair<int, long long> pil;
typedef vector<pair<int, int>> vii;
typedef vector<pair<long long, long long>> vll;
typedef vector<pair<long long, int>> vli;
typedef vector<pair<int, long long>> vil;

template <class T1, class T2> bool maximize(T1 &x, T2 y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
template <class T1, class T2> bool minimize(T1 &x, T2 y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}

template <class T> void remove_duplicate(vector<T> &ve) {
    sort (ve.begin(), ve.end());
    ve.resize(unique(ve.begin(), ve.end()) - ve.begin());
}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
template <class T1, class T2> T1 random(T1 l, T2 r) {
    return uniform_int_distribution<T1>(l, r)(rng);
}
template <class T> T random(T r) {
    return rng() % r;
}

const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const long long INF = 1e18;

int n;
int le[N], ri[N], dp[N];
vector<int> adj[N];

void init(int _n, vector<int> h) {
    n = _n;

    stack<int> st;
    for (int i = 0; i < n; ++i) {
        while (!st.empty() && h[st.top()] < h[i]) st.pop();
        le[i] = (st.empty() ? -1 : st.top());
        st.emplace(i);
    }

    while (!st.empty()) st.pop();
    for (int i = n - 1; i > 0; --i) {
        while (!st.empty() && h[st.top()] < h[i]) st.pop();
        ri[i] = (st.empty() ? n : st.top());
        st.emplace(i);
    }

    for (int i = 0; i < n; ++i) {
        adj[i].clear();
        if (le[i] != -1) adj[i].emplace_back(le[i]);
        if (ri[i] != n) adj[i].emplace_back(ri[i]);
    }
}

void dfs(int u) {
    if (dp[u] != -1) return;
    dp[u] = inf;
    for (auto v : adj[u]) {
        dfs(v);
        minimize(dp[u], 1 + dp[v]);
    }
}

int minimum_jumps(int a, int b, int c, int d) {
    for (int i = 0; i < n; ++i) dp[i] = -1;
    for (int i = c; i <= d; ++i) dp[i] = 0;

    for (int i = a; i <= b; ++i) dfs(i);

    int ans = *min_element(dp + a, dp + b + 1);
    return (ans == inf ? -1 : ans);
}

#ifdef hwe
signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

    int n, q; cin >> n >> q;

    vector<int> h(n);
    for (auto &x : h) cin >> x;

    init(n, h);
    
    for (int _ = 0; _ < q; ++_) {
        int a, b, c, d; cin >> a >> b >> c >> d;
        cerr << minimum_jumps(a, b, c, d) << '\n';
    }

    return 0;
}
#endif

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 23
• Subtask 6: 0 / 21
• Subtask 7: 0 / 19