Submission #660776

#	Time	Username	Problem	Language	Result	Execution time	Memory
660776		danikoynov	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	94 ms	64596 KiB

skyscraper

#include <bits/stdc++.h>
#define endl '\n'

using namespace std;
typedef long long ll;

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

const int maxn = 2010;
const ll inf = 1e18;

struct doge
{
    int b, p;
}d[maxn];

struct edge
{
    int u;
    ll w;

    edge(int _u, ll _w)
    {
        u = _u;
        w = _w;
    }

    bool operator < (const edge &e) const
    {
        return w > e.w;
    }
};

vector < edge > g[maxn];

int n, m, used[maxn];
ll dp[maxn];
void dijkstra(int s)
{
    for (int i = 0; i < m; i ++)
    {
        used[i] = 0;
        dp[i] = inf;
    }

    priority_queue < edge > pq;
    pq.push(edge(0, 0));
    dp[0] = 0;
    while(!pq.empty())
    {
        edge cur = pq.top();
        pq.pop();
        if (!used[cur.u])
        {
            used[cur.u] = 1;
            for (int i = 0; i < g[cur.u].size(); i ++)
            {
                edge nb = g[cur.u][i];
                nb.w += cur.w;
                if (nb.w < dp[nb.u])
                {
                    dp[nb.u] = nb.w;
                    pq.push(nb);
                }
            }
        }
    }
}
void solve()
{
    cin >> n >> m;
    for (int i = 0; i < m; i ++)
    {
        cin >> d[i].b >> d[i].p;
    }

    for (int i = 0; i < m; i ++)
        for (int j = 0; j < m; j ++)
    {
        if (i == j)
            continue;

        int dis = abs(d[i].b - d[j].b);
        if (dis % d[i].p == 0)
            g[i].push_back(edge(j, dis / d[i].p));
    }

    dijkstra(0);

    if (dp[1] == inf)
        cout << -1 << endl;
    else
        cout << dp[1] << endl;
}

int main()
{
    solve();
    return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'void dijkstra(int)':
skyscraper.cpp:61:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             for (int i = 0; i < g[cur.u].size(); i ++)
      |                             ~~^~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43