Submission #1072657

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1072657	2024-08-24 02:00:13	kym	Building Skyscrapers (CEOI19_skyscrapers)	C++14	54 / 100	354 ms	24516 KiB

skyscrapers

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#include <bits/stdc++.h>
using namespace std;
#define int long long 
typedef pair<int,int>pi;
const int oo = 1'000'000'000'000'000'000ll;
int dx[]={-1,0,1,-1,1,-1,0,1};
int dy[]={-1,-1,-1,0,0,1,1,1};
vector<int>ord;
map<pi,int>idx;
map<pi,bool>done;
int32_t main(){
  int n,t;cin>>n>>t;
  pi mn={oo,oo};
  for(int i=1;i<=n;i++){
    int x,y;cin>>x>>y;
    idx[{x,y}]=i;
    mn=min(mn,make_pair(x,y));
  }
  priority_queue<pi,vector<pi>,greater<pi>>pq;
  pq.push(mn);
  done[mn]=1;
  while(pq.size()){
    pi cur=pq.top();pq.pop();
    int x=cur.first,y=cur.second;
    ord.push_back(idx[{x,y}]);
    for(int k=0;k<8;k++){
      int nx=x+dx[k],ny=y+dy[k];
      if(idx.find({nx,ny}) != idx.end() && !done[{nx,ny}]){
        done[{nx,ny}]=1;
        pq.push({nx,ny});
 
 
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Compilation message (stderr)

skyscrapers.cpp: In function 'int32_t main()':
skyscrapers.cpp:34:16: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   34 |  if(ord.size() != n)cout<<"NO\n";
      |     ~~~~~~~~~~~^~~~

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 12 / 12
• Subtask 4: 0 / 17
• Subtask 5: 20 / 20
• Subtask 6: 0 / 10
• Subtask 7: 0 / 19