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Submission #959575

# Submission time Handle Problem Language Result Execution time Memory
959575 2024-04-08T13:12:04 Z Blagoj Jakarta Skyscrapers (APIO15_skyscraper) C++17
10 / 100
 2 ms 2396 KB 
#include <bits/stdc++.h>

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];
int spot[mxn], jump[mxn], val[mxn];
int dx[] = {-1, 1};

void solve() {
    priority_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.top().first, pos = pq.top().second.first, pwr = pq.top().second.second;
        pq.pop();
        if (dist > best[pos][pwr]) continue;
        if (val[pos] != -1) {
            if (!best[pos].count(jump[val[pos]])) best[pos][jump[val[pos]]] = 1e16; 
            if (dist < best[pos][jump[val[pos]]]) {
                best[pos][jump[val[pos]]] = dist;
                pq.push({-dist, {pos, jump[val[pos]]}});
            }
        }
        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] = 1e16; 
                if (dist + 1 < best[newPos][pwr]) {
                    best[newPos][pwr] = dist + 1;
                    pq.push({-best[newPos][pwr], {newPos, pwr}});
                }
            }
        }
    }
    ll ans = 1e16;
    for (auto x : best[spot[1]]) ans = min(ans, x.second);
    cout << (ans != 1e16 ? ans : -1);
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    memset(val, -1, sizeof(val));
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        cin >> spot[i] >> jump[i];
        val[spot[i]] = i;
    }
    solve();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2140 KB Output is correct
2 Correct 1 ms 2140 KB Output is correct
3 Correct 1 ms 2176 KB Output is correct
4 Correct 1 ms 2140 KB Output is correct
5 Correct 1 ms 2140 KB Output is correct
6 Correct 1 ms 2140 KB Output is correct
7 Correct 1 ms 2140 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2140 KB Output is correct
2 Correct 1 ms 2172 KB Output is correct
3 Correct 1 ms 2140 KB Output is correct
4 Correct 1 ms 2140 KB Output is correct
5 Correct 1 ms 2140 KB Output is correct
6 Correct 1 ms 2140 KB Output is correct
7 Correct 1 ms 2140 KB Output is correct
8 Correct 1 ms 2140 KB Output is correct
9 Correct 1 ms 2140 KB Output is correct
10 Correct 2 ms 2140 KB Output is correct
11 Incorrect 2 ms 2392 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2140 KB Output is correct
2 Correct 1 ms 2140 KB Output is correct
3 Correct 1 ms 2140 KB Output is correct
4 Correct 1 ms 2140 KB Output is correct
5 Correct 1 ms 2140 KB Output is correct
6 Correct 2 ms 2140 KB Output is correct
7 Correct 1 ms 2140 KB Output is correct
8 Correct 1 ms 2136 KB Output is correct
9 Correct 1 ms 2140 KB Output is correct
10 Correct 1 ms 2140 KB Output is correct
11 Incorrect 1 ms 2140 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2140 KB Output is correct
2 Correct 1 ms 2140 KB Output is correct
3 Correct 1 ms 2140 KB Output is correct
4 Correct 2 ms 2396 KB Output is correct
5 Correct 1 ms 2140 KB Output is correct
6 Correct 1 ms 2136 KB Output is correct
7 Correct 2 ms 2140 KB Output is correct
8 Correct 1 ms 2140 KB Output is correct
9 Correct 1 ms 2140 KB Output is correct
10 Correct 2 ms 2220 KB Output is correct
11 Incorrect 2 ms 2392 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2140 KB Output is correct
2 Correct 1 ms 2140 KB Output is correct
3 Correct 1 ms 2148 KB Output is correct
4 Correct 1 ms 2140 KB Output is correct
5 Correct 1 ms 2140 KB Output is correct
6 Correct 1 ms 2140 KB Output is correct
7 Correct 1 ms 2224 KB Output is correct
8 Correct 1 ms 2140 KB Output is correct
9 Correct 1 ms 2140 KB Output is correct
10 Correct 1 ms 2140 KB Output is correct
11 Incorrect 1 ms 2140 KB Output isn't correct
12 Halted 0 ms 0 KB -