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Submission #962491

# Submission time Handle Problem Language Result Execution time Memory
962491 2024-04-13T16:53:42 Z BhavayGoyal Jakarta Skyscrapers (APIO15_skyscraper) C++14
0 / 100
 1 ms 1268 KB 
#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<class T> using oset = 
            tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define ll long long
#define ld long double
#define ar array
#define vi vector<int>
#define vii vector<vector<int>>
#define pii pair<int, int>
#define pb push_back
#define all(x) x.begin(), x.end()
#define f first
#define s second
#define endl "\n"

const int MOD = 1e9+7;
const int inf = 1e9;
const ll linf = 1e18;

const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};

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


// -------------------------------------------------- Main Code --------------------------------------------------

const int N = 3e4+4;
int n, m; 
vi doges[N];

void sol() {
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int x, p; cin >> x >> p; x++;
        doges[x].pb(p);
    }

    priority_queue<pii, vector<pii>, greater<>> q;
    q.push({0, 1});
    vi dis(n+1, inf); dis[1] = 0;
    while (!q.empty()) {
        pii f = q.top(); q.pop();
        int src = f.s, dist = f.f;
        if (dist != dis[src]) continue;

        if (src == 2) {
            cout << dist << endl; 
            return;
        }

        for (auto x : doges[src]) {
            int ct = 1;
            for (int ch = src+x; ch <= n; ch += x) {
                if (dis[ch] > dis[src] + ct) {
                    dis[ch] = dis[src] + ct;
                    q.push({dis[ch], ch});
                }
                ct++;
            }
            ct = 1;
            for (int ch = src-x; ch >= 1; ch -= x) {
                if (dis[ch] > dis[src] + ct) {
                    dis[ch] = dis[src] + ct;
                    q.push({dis[ch], ch});
                }
                ct++;
            }
        }
    }

    cout << -1 << endl;
}

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int t = 1;
    // cin >> t; 
    while (t--) {
        sol();
    }
    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Incorrect 1 ms 1116 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Incorrect 1 ms 1116 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Incorrect 1 ms 1116 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Incorrect 1 ms 1268 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Incorrect 1 ms 1168 KB Output isn't correct
3 Halted 0 ms 0 KB -