Submission #452075

#	Time	Username	Problem	Language	Result	Execution time	Memory
452075		Sarah_Mokhtar	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	2 ms	1868 KiB

skyscraper

//Sorry but iam targeting IOI :))
//NEVER LOSE HOPE
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
#define endl "\n"
#define int long long
#define ceil(a,b)   (a+(b-1))/b
#define all(v) v.begin(),v.end()
#define Hidden ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
using namespace std;
const int N=3e4+10,mod = 1e9+7;
pair<int,int>arr[N];
vector<pair<int,int>>edges[N];
vector<int>freq[N];
int32_t main()
{
  //freopen("dprime.in" , "r" , stdin);
  int n, m;
  cin >> n >> m;
  for(int i = 0 ; i < m ; i ++)
  {
    int b , p;
    cin>>b>>p;
    arr[i]={b,p};
    freq[b].push_back(i);
  }
  for(int i = 0 ; i < m ; i++)
  {
    for(int j = arr[i].first ; j<=n ; j+=arr[i].second)
    {
      if(j==0) continue;
      for(int p = 0 ; p < freq[j].size() ; p ++)
      {
        edges[arr[i].first].push_back({arr[freq[j][p]].first ,(j-arr[i].first)/arr[i].second});
      }
    }
    for(int j = arr[i].first ; j>=0 ; j-=arr[i].second)
    {
      if(j==0) continue;
      for(int p = 0 ; p < freq[j].size() ; p ++)
      {
        edges[arr[i].first].push_back({arr[freq[j][p]].first ,(arr[i].first-j)/arr[i].second});
      }
    }
  }


  priority_queue<pair<int,int>>pq;
  pq.push({0,arr[0].first});
  int dist[N];
  for(int i = 0 ; i < N ; i++) dist[i]=1e15;
  dist[arr[0].first]=0;
  while(!pq.empty())
  {
    pair<int,int>p=pq.top();
    pq.pop();
    for(int i = 0; i < edges[p.second].size() ; i++)
    {
      int cost=dist[p.second]+edges[p.second][i].second;
      if(dist[edges[p.second][i].first] > cost)
      {
        dist[edges[p.second][i].first] = cost;
        pq.push({-cost , edges[p.second][i].first});
      }
    }
  }
  if(dist[arr[1].first] == INT_MAX) cout<<"-1";
  else cout<<dist[arr[1].first];


}

Compilation message (stderr)

skyscraper.cpp: In function 'int32_t main()':
skyscraper.cpp:33:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |       for(int p = 0 ; p < freq[j].size() ; p ++)
      |                       ~~^~~~~~~~~~~~~~~~
skyscraper.cpp:41:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |       for(int p = 0 ; p < freq[j].size() ; p ++)
      |                       ~~^~~~~~~~~~~~~~~~
skyscraper.cpp:58:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i = 0; i < edges[p.second].size() ; i++)
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~

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