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Submission #960483

# Submission time Handle Problem Language Result Execution time Memory
960483 2024-04-10T14:07:56 Z Blagoj Jakarta Skyscrapers (APIO15_skyscraper) C++17
10 / 100
 1000 ms 2848 KB 
#include <bits/stdc++.h>
 
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast,unroll-loops")

using namespace std;
 
#define endl '\n'
#define ll long long
#define all(x) (x).begin(), (x).end()
 
const int mxn = 30010;
 
int n, m;
unordered_map<int, ll> best[mxn];
vector<int> val[mxn];
int spot[mxn], jump[mxn];
int dx[] = {-1, 1};
 
void solve() {
    queue<pair<ll, pair<int, int>>> pq;
    pq.push({0, {spot[0], jump[0]}});
    best[spot[0]][jump[0]] = 0;
    while (pq.size()) {
        ll dist = -pq.front().first, pos = pq.front().second.first, pwr = pq.front().second.second;
        if (dist != best[pos][pwr]) continue;
        pq.pop();
        for (auto x : val[pos]) {
            if (!best[pos].count(jump[x])) best[pos][jump[x]] = 1e18; 
            if (dist < best[pos][jump[x]]) {
                best[pos][jump[x]] = dist;
                pq.push({-dist, {pos, jump[x]}});
            }
        }
        for (int d = 0; d < 2; d++) {
            int newPos = pos + pwr * dx[d];
            if (0 <= newPos && newPos < n) {
                if (!best[newPos].count(pwr)) best[newPos][pwr] = 1e18; 
                if (dist + 1 < best[newPos][pwr]) {
                    best[newPos][pwr] = dist + 1;
                    pq.push({-best[newPos][pwr], {newPos, pwr}});
                }
            }
        }
    }
    ll ans = 1e18;
    for (auto x : best[spot[1]]) ans = min(ans, x.second);
    cout << (ans != 1e18 ? ans : -1);
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        cin >> spot[i] >> jump[i];
        val[spot[i]].push_back(i);
    }
    solve();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 2 ms 2652 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Execution timed out 1046 ms 2648 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2848 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Execution timed out 1060 ms 2652 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2700 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2804 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Execution timed out 1039 ms 2648 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 2 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Execution timed out 1093 ms 2652 KB Time limit exceeded
10 Halted 0 ms 0 KB -