Submission #297587

#	Time	Username	Problem	Language	Result	Execution time	Memory
297587		AaronNaidu	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	1 ms	1664 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int n, m, b, p;
vector<int> doges[50000];
int matrix[3000][3000];
int powers[50000];
int positions[50000];
priority_queue<pair<int, int> > q;
int dists[50000];
bool visited[50000];
bool visited2[3000][3000]; //position then power
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin >> n >> m;
    for (int i = 0; i < m; i++)
    {
        cin >> b >> p;
        powers[i] = p;
        positions[i] = b;
        doges[b].push_back(i);
    }
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            matrix[i][j] = 1000000009;
        }
        dists[i] = 1000000000;
    }
    for (int i = 0; i < m; i++)
    {
        int jumpCount = -1;
        for (int j = positions[i]; j < n; j+=powers[i])
        {
            jumpCount++;
            matrix[positions[i]][j] = min(matrix[positions[i]][j], jumpCount);
        }
        jumpCount = 0;
        for (int j = positions[i]-powers[i]; j >= 0; j-=powers[i])
        {
            jumpCount++;
            matrix[positions[i]][j] = min(matrix[positions[i]][j], jumpCount);
        }
        
    }
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cout << matrix[i][j] << " ";
        }
        cout << "\n";
    }
    
    q.push({0, positions[0]});
    dists[positions[0]] = 0;
    while (!q.empty()) 
    {
        int x = q.top().second;
        //cout << "At node " << x << " which is " << dists[x] << " away\n";
        if (x == positions[1])
        {
            int ans = dists[positions[1]];
            cout << ans << "\n";
            return 0;
        }
        q.pop();
        if (visited[x])
        {
            continue;
        }
        visited[x] = true;
        for (int i = 0; i < n; i++)
        {
            if (!visited[i] and dists[x] + matrix[x][i] < dists[i])
            {
                dists[i] = dists[x] + matrix[x][i];
                q.push({-dists[i], i});
                //cout << "Pushing " << 
            }
        }   
    }
    cout << "-1\n";
}

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