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Submission #1035379

# Submission time Handle Problem Language Result Execution time Memory
1035379 2024-07-26T10:04:07 Z AverageAmogusEnjoyer Rainforest Jumps (APIO21_jumps) C++17
0 / 100
 4000 ms 21668 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template<class T> bool cmin(T &i, T j) { return i > j ? i=j,true:false; }
template<class T> bool cmax(T &i, T j) { return i < j ? i=j,true:false; }

mt19937 mrand(chrono::steady_clock::now().time_since_epoch().count());

int rng() {
    return abs((int)mrand());
}

// Current challenge: finish CSES problemset!!

constexpr int nax = 200200, lg = 20;
int h[nax];
int par[nax][2];
int partree[nax];
int sparse[lg][nax];

void init(int n, vector<int> H) {
    for (int i=0;i<n;i++) {
        h[i] = H[i]-1;
        par[i][0] = par[i][1] = n;
    }
    for (int i=0;i<n;i++) {
        sparse[0][i] = h[i];
    }
    for (int pw=1;pw<lg;pw++) {
        for (int i=0;i<n;i++) {
            sparse[pw][i] = max(sparse[pw-1][i],sparse[pw-1][min(n-1,i+(1<<(pw-1)))]);
        }
    }
    h[n] = n;
    vector<int> stk;
    for (int i=0;i<n;i++) {
        while(!stk.empty() && h[stk.back()] < h[i]) { stk.pop_back(); } 
        if (!stk.empty()) par[i][0] = stk.back();
        stk.push_back(i);
    }
    stk.clear();
    for (int i=n-1;i>=0;i--) {
        while(!stk.empty() && h[stk.back()] < h[i]) { stk.pop_back(); } 
        if (!stk.empty()) par[i][1] = stk.back();
        stk.push_back(i);
    }
    for (int i=0;i<n;i++) {
        if (h[i] == n-1) { partree[i] = -1; continue; } 
        assert(h[par[i][0]] != h[par[i][1]]);
        if (par[i][0] == n) {
            partree[i] = par[i][1];
        } else if (par[i][1] == n) {
            partree[i] = par[i][0];
        } else {
            partree[i] = (h[par[i][0]] > h[par[i][1]] ? par[i][0] : par[i][1]);
        }
    }       
}

int jump(int a,int b) {
    if (h[a] > h[b]) { return nax; } 
    int x = a;
    int ans = 0;
    // int cnt_not_greatest = 0;
    int w = -1;
    assert(a!=b);
    int bit = 31 - __builtin_clz(b-a+1);
    if (max(sparse[bit][a],sparse[bit][b-(1<<bit)+1]) > h[b]) {
        return nax;
    }
    while(x != b) {
        if (h[par[x][0]] > h[b]) {
            // cnt_not_greatest++;
            x = par[x][1];
            assert(w != 0);
            w = 1;
            ans++;
        } else if (h[par[x][1]] > h[b]) {
            x = par[x][0];
            assert(w != 1);
            w = 0;
            // cnt_not_greatest++;
            ans++;
        } else {
            x = (h[par[x][0]] > h[par[x][1]] ? par[x][0] : par[x][1]);
            ans++;
        }
    }
    // assert(cnt_not_greatest<=1);
    return ans;
}

int minimum_jumps(int a,int b,int c,int d) {
    int ans = nax;
    for (int A=a;A<=b;A++) {
        int C = c;
        while(C <= d && h[C] < h[A]) { C++; } 
        if (C <= d) 
            cmin(ans,jump(A,C)); 
    }
    return (ans == nax ? -1 : ans);
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Execution timed out 4075 ms 17452 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Incorrect 1 ms 600 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Incorrect 1 ms 600 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 23 ms 16720 KB Output is correct
6 Correct 32 ms 20692 KB Output is correct
7 Correct 14 ms 10840 KB Output is correct
8 Correct 41 ms 20676 KB Output is correct
9 Correct 4 ms 3416 KB Output is correct
10 Correct 25 ms 20544 KB Output is correct
11 Execution timed out 4056 ms 21668 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 140 ms 9656 KB Output is correct
5 Correct 645 ms 20568 KB Output is correct
6 Correct 451 ms 3928 KB Output is correct
7 Correct 700 ms 20712 KB Output is correct
8 Correct 350 ms 7512 KB Output is correct
9 Correct 732 ms 20560 KB Output is correct
10 Execution timed out 4094 ms 21528 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #6
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 140 ms 9656 KB Output is correct
5 Correct 645 ms 20568 KB Output is correct
6 Correct 451 ms 3928 KB Output is correct
7 Correct 700 ms 20712 KB Output is correct
8 Correct 350 ms 7512 KB Output is correct
9 Correct 732 ms 20560 KB Output is correct
10 Execution timed out 4094 ms 21528 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Execution timed out 4075 ms 17452 KB Time limit exceeded
4 Halted 0 ms 0 KB -