Submission #786084

#	Time	Username	Problem	Language	Result	Execution time	Memory
786084		christinelynn	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	0 / 100	1 ms	320 KiB

skyscraper

#include<bits/stdc++.h>
#define int long long
#define pii pair<int, int>
using namespace std;
const int INF=1e17;
signed main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n, m; cin >> n >> m;
    vector<int> a(m), b(m), dist(m);
    vector<vector<pii>> adj(m);
    for(int i=0; i<m; i++) cin >> a[i] >> b[i], dist[i]=INF;
    for(int i=0; i<m; i++) {
      for(int j=0; j<m; j++) {
        if(i==j) continue;
        if(abs(a[i]-a[j])%b[i]) continue;
        adj[i].push_back({j, abs(a[i]-a[j])/b[i]});
    }
  }
  priority_queue<pii, vector<pii>, greater<pii>> pq;
  pq.push({0, 0});
  dist[0]=0; vector<bool> vis(m);
  while(!pq.empty()) {
    int cur=pq.top().first, u=pq.top().second;
    pq.pop();
    if(vis[u]) continue;
    vis[u]=1;
    for(auto p : adj[u]) {
      if(dist[p.first]>dist[u]+p.second) {
        dist[p.first]=dist[u]+p.second;
        pq.push({dist[p.first], p.first});
      }
    }
  }
  cout << dist[1] << '\n';
    return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:23:9: warning: unused variable 'cur' [-Wunused-variable]
   23 |     int cur=pq.top().first, u=pq.top().second;
      |         ^~~

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