Submission #668152

#	Time	Username	Problem	Language	Result	Execution time	Memory
668152		mhn2	Skyscraper (JOI16_skyscraper)	C++17	0 / 100	1 ms	1800 KiB

skyscraper

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
#define pb push_back
#define endl '\n'
using namespace std;

const int N = 3e4+5;
int b[N], p[N];
ll d[N];
vector<pii> adj[N];

int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= m; i++) {
        cin >> b[i] >> p[i];
        d[i] = -1;
    }

    for (int i = 1; i <= m; i++)
        for (int j = 1; j <= m; j++)
            if (i != j && abs(b[i]-b[j]) % p[i] == 0)
                adj[i].pb({j, abs(b[i]-b[j]) / p[i]});
    
    priority_queue<pll> q;
    q.push({0, 1});
    while (q.size()) {
        ll v = q.top().S, w = -q.top().F;
        q.pop();

        if (d[v] != -1)
            continue;
        d[v] = w;

        for (pii x : adj[v])
            q.push({-x.S-w, x.F});
    }

    cout << d[2] << endl;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80