oj.uz

답안 #1035838

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1035838 2024-07-26T16:38:34 Z _8_8_ 밀림 점프 (APIO21_jumps) C++17
0 / 100
 4000 ms 90460 KB 
#include "jumps.h"
 
#include <vector>
#include <bits/stdc++.h>
using namespace std;
 
const int B = 20;
int n;
vector<vector<int>> build(vector<vector<int>> g,vector<int>rt){
    vector<vector<int>> up(n+1);
    function<void(int,int )> dfs = [&](int v,int pr) {
        up[v].resize(B);
        up[v][0] = pr;
        for(int i = 1;i < B;i++){
            up[v][i] = up[up[v][i - 1]][i - 1];
        }
        for(int to:g[v]) {  
            dfs(to,v);
        }
    };
    for(int i:rt) {
        dfs(i,i);
    }
    return up;
}
vector<vector<int>> up,up1;
const int maxn = (int)2e5 + 12;
int l[maxn],r[maxn];
vector<int> h;
void init(int N, vector<int> H) {
    h = H;
    n = N;
    vector<int> st,rt;
    vector<vector<int>> G(n);
    for(int i = 0;i < N;i++) {
        while(!(int)st.empty() && H[st.back()] < H[i]) {
            st.pop_back();
        }
        if(st.empty()){
            rt.push_back(i);
            l[i] = -1;
        }else {
            G[st.back()].push_back(i);            
            l[i] = st.back();
        }
        st.push_back(i);
    }
    up = build(G,rt);
    for(int i = 0;i < n;i++){
        G[i].clear();
    }
    rt.clear();
    st.clear();
    for(int i = N - 1;i >= 0;i--){
        while(!st.empty() && H[st.back()] < H[i]){
            st.pop_back();
        }
        if(st.empty()){
            rt.push_back(i);
            r[i] = -1;
        }else {
            G[st.back()].push_back(i);
            r[i] = st.back();
        }
        st.push_back(i);
    }
    up1 = build(G,rt);
}
bool check(int ver,int C,int D){
    for(int i = B - 1;i >= 0;i--){
        if(up1[ver][i] < C){
            ver = up1[ver][i];
        }
    }
    ver = up1[ver][0];
    return (ver >= C && ver <= D);
}
int go(int ver,int C,int D) {
    if(ver >= C && ver <= D) return 0;
    if(r[ver] >= C && r[ver] <= D) return 1;

    if(l[ver] == -1 || h[r[ver]] > h[l[ver]] || !check(l[ver],C,D)){
        return go(r[ver],C,D) + 1;
    }
    return go(l[ver],C,D) + 1;
}
int minimum_jumps(int A, int B, int C, int D) {
    // int res = 1e9;
    int ver = B;
    for(int i = 19;i >= 0;i--){
        if(up[ver][i] >= A && check(ver,C,D) != 0){
            ver = up[ver][i];
        }
    }
    if(!check(ver,C,D)){
        return -1;
    }
    return go(ver,C,D);
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1066 ms 72084 KB Output is correct
4 Execution timed out 4098 ms 90324 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 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 Incorrect 1 ms 344 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# 결과 실행 시간 메모리 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 Incorrect 1 ms 344 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 87 ms 54932 KB Output is correct
6 Correct 126 ms 68096 KB Output is correct
7 Correct 57 ms 35128 KB Output is correct
8 Correct 104 ms 68092 KB Output is correct
9 Correct 16 ms 10428 KB Output is correct
10 Correct 105 ms 68092 KB Output is correct
11 Correct 115 ms 90204 KB Output is correct
12 Incorrect 111 ms 85988 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 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 196 ms 31216 KB Output is correct
5 Correct 813 ms 68088 KB Output is correct
6 Correct 491 ms 11600 KB Output is correct
7 Correct 792 ms 68216 KB Output is correct
8 Correct 432 ms 23552 KB Output is correct
9 Correct 785 ms 68092 KB Output is correct
10 Execution timed out 4034 ms 90460 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #6
0 / 21.0

# 결과 실행 시간 메모리 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 196 ms 31216 KB Output is correct
5 Correct 813 ms 68088 KB Output is correct
6 Correct 491 ms 11600 KB Output is correct
7 Correct 792 ms 68216 KB Output is correct
8 Correct 432 ms 23552 KB Output is correct
9 Correct 785 ms 68092 KB Output is correct
10 Execution timed out 4034 ms 90460 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1066 ms 72084 KB Output is correct
4 Execution timed out 4098 ms 90324 KB Time limit exceeded
5 Halted 0 ms 0 KB -