oj.uz

Submission #486498

# Submission time Handle Problem Language Result Execution time Memory
486498 2021-11-11T21:09:44 Z fun_day Jakarta Skyscrapers (APIO15_skyscraper) C++14
0 / 100
 1 ms 276 KB 
#include <bits/stdc++.h>

using namespace std;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n , m;
  cin >> n >> m;
  vector<vector<pair<int,int>>> adj(n);
  for(int i = 0 ; i < m ; i++){
    int a , b;
    cin >> a >> b;
    for(int j = a + b , cnt = 1 ; j < n ; j += b , cnt++){
      adj[a].emplace_back(j , cnt);
    }
    for(int j = a - b , cnt = 1 ; j >= 0 ; j -= b , cnt++){
      adj[a].emplace_back(j , cnt);
    }
  }
  priority_queue<pair<int,int> , vector<pair<int,int>> , greater<pair<int,int>>> pq;
  pq.emplace(0 , 0);
  vector<int> dist(n + 1 , (int)1e9);
  dist[0] = 0;
  while(!pq.empty()){
    auto f = pq.top();
    pq.pop();
    if(f.first != dist[f.second]) continue;
    for(auto x : adj[f.second]){
      int node = x.first;
      int cost = x.second;
      if(dist[node] > f.first + cost){
        dist[node] = f.first + cost;
        pq.emplace(dist[node] , node);
      }
    }
  }
  if(dist[1] == (int)1e9) cout << -1 << '\n';
  else cout << dist[1] << '\n';
  return 0; 
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 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 204 KB Output is correct
2 Incorrect 1 ms 276 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 204 KB Output is correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -