Submission #1072657

#	Time	Username	Problem	Language	Result	Execution time	Memory
1072657		kym	Building Skyscrapers (CEOI19_skyscrapers)	C++14	54 / 100	354 ms	24516 KiB

skyscrapers

#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});
			}
		}
	}
	if(ord.size() != n)cout<<"NO\n";
	else{
		cout<<"YES\n";
		for(auto x:ord)cout<<x<<"\n";
	}
}

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