#include "jumps.h"
#include <iostream>
#include <algorithm>
#include <vector>
#include <stack>
using namespace std;
int n;
vector<int> h, pge, nge, dp;
vector<vector<int>> gp;
int a, b, c, d;
vector<int> pge_(vector<int> v)
{
vector<int> tmp(v.size());
stack<int> s;
s.push(0);
tmp[0] = -1;
for (int i = 1; i < v.size(); i++)
{
while (!s.empty() && v[s.top()] < v[i]) s.pop();
tmp[i] = (s.empty() ? -1 : s.top());
}
return tmp;
}
vector<int> nge_(vector<int> v)
{
stack<int> s;
vector<int> tmp(v.size(), -1);
for (int i = 0; i < n; i++)
{
while (!s.empty() && v[s.top()] < v[i]) tmp[s.top()] = i, s.pop();
s.push(i);
}
return tmp;
}
void dfs(int u)
{
if (u >= c && u <= d) { dp[u] = 0; return; }
if (dp[u] != 2e9) return;
int x = 2e9, y = 2e9;
if (!gp[u].empty() ) dfs(gp[u][0]), x = dp[gp[u][0]];
if ( gp[u].size() > 1) dfs(gp[u][1]), y = dp[gp[u][1]];
dp[u] = min(int(2e9), min(x, y) + 1);
}
void init(int N, vector<int> H)
{
n = N;
h = H;
pge = pge_(H);
nge = nge_(H);
gp = vector<vector<int>>(n);
for (int i = 0; i < n; i++)
{
if (pge[i] != -1) gp[i].push_back(pge[i]);
if (nge[i] != -1) gp[i].push_back(nge[i]);
}
}
int minimum_jumps(int A, int B, int C, int D)
{
a = A, b = B, c = C, d = D;
dp = vector<int>(n, 2e9);
int mn = 2e9;
for (int i = a; i <= b; i++) dfs(i), mn = min(mn, dp[i]);
return (mn == 2e9 ? -1 : mn);
}
Compilation message
jumps.cpp: In function 'std::vector<int> pge_(std::vector<int>)':
jumps.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for (int i = 1; i < v.size(); i++)
| ~~^~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Execution timed out |
4019 ms |
17724 KB |
Time limit exceeded |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Correct |
0 ms |
208 KB |
Output is correct |
4 |
Correct |
0 ms |
208 KB |
Output is correct |
5 |
Correct |
1 ms |
208 KB |
Output is correct |
6 |
Incorrect |
2 ms |
208 KB |
Output isn't correct |
7 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Correct |
0 ms |
208 KB |
Output is correct |
4 |
Correct |
0 ms |
208 KB |
Output is correct |
5 |
Correct |
1 ms |
208 KB |
Output is correct |
6 |
Incorrect |
2 ms |
208 KB |
Output isn't correct |
7 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Correct |
0 ms |
208 KB |
Output is correct |
4 |
Correct |
0 ms |
208 KB |
Output is correct |
5 |
Correct |
36 ms |
12848 KB |
Output is correct |
6 |
Correct |
59 ms |
15896 KB |
Output is correct |
7 |
Correct |
18 ms |
7820 KB |
Output is correct |
8 |
Correct |
44 ms |
15944 KB |
Output is correct |
9 |
Correct |
7 ms |
2548 KB |
Output is correct |
10 |
Correct |
43 ms |
15880 KB |
Output is correct |
11 |
Correct |
49 ms |
22132 KB |
Output is correct |
12 |
Execution timed out |
4096 ms |
19060 KB |
Time limit exceeded |
13 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Correct |
0 ms |
208 KB |
Output is correct |
4 |
Incorrect |
884 ms |
7484 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Correct |
0 ms |
208 KB |
Output is correct |
4 |
Incorrect |
884 ms |
7484 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
208 KB |
Output is correct |
2 |
Correct |
0 ms |
208 KB |
Output is correct |
3 |
Execution timed out |
4019 ms |
17724 KB |
Time limit exceeded |
4 |
Halted |
0 ms |
0 KB |
- |