Language: C++

#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <algorithm>
#include <vector>
#include <utility>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <functional>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
 
using namespace std;
 
#define REP(i,s,e) for(int i=(s); i<(int)(e); i++)
#define rep(i,n) REP(i, 0, n)
#define pb push_back
#define mp make_pair
#define all(r) (r).begin(),(r).end()
#define rall(r) (r).rbegin(),(r).rend()
#define fi first
#define se second
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef vector<ll> vl;
typedef vector<vl> vll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 

 
const int INF = 1000000;
const double EPS = 1e-8;
const int mod = 1e9 + 7;
//const double D_INF = 1e18;

const double PI = acos(-1);

int dx[] ={-1,0,1,0};
int dy[] ={0,-1,0,1};

struct Edge
{
	int t, c;
	Edge(){};
	Edge(int t, int c) : t(t), c(c){};
};

int n;
int b[1010], x[1010], y[1010];
vector<Edge> edge[1010];

pair<int, int> d[1010];
bool used[1010];
vi ans;

void dijkstra(int s){
	rep(i, 1010){
		d[i] = mp(INF, -1);
		used[i] = false;
	}
	d[s].fi = 0;
	priority_queue<pii, vector<pii>, greater<pii> > q;
	pii p;
	q.push(mp(0, s));
	int from, to, cost;
	while(!q.empty()){
		p = q.top(); q.pop();
		from = p.se;
		//cost = p.fi;
		if(d[from]<p.fi) continue;
		cost = d[from].fi;
		used[from] = true;
		edge e = edge[from];
		for(int i = 0; i < e.size(); i++){
			to = e[i].t;
			//if(used[to]) continue;
			if(d[to].fi > cost+e[i].c){
				d[to].fi = cost+e[i].c;
				d[to].se = from;
				q.push(mp(d[to].fi, to));
			}
		}
	}
}

int main(){
	int m, dx, dy;
	while(cin>>n && n){
		//cout<<n<<endl;
		rep(i, 1010){
			b[i]=x[i]=y[i] = -1;
			d[i] = mp(INF, -1);
			used[i] = false;
			edge[i].clear();
		}
		rep(i, n) cin>>b[i]>>x[i]>>y[i];
		for(int i = 0; i < 1010; i++){
			if(b[i] == -1 || x[i] == -1 || y[i]== -1) continue;
			for(int j = i + 1; j < 1010; j++){
				if(b[j] == -1 || x[j] == -1 || y[j] == -1) continue;
				dx = x[i]-x[j];
				dy = y[i]-y[j];
				if(dx*dx+dy*dy>2500)continue;
				edge[b[i]].push_back(Edge(b[j], dx*dx+dy*dy));
				edge[b[j]].push_back(Edge(b[i], dx*dx+dy*dy));
			}
		}
		//cout<<edge[1][0].t<<" "<<edge[1][0].c<<endl;
		//cout<<edge[2][0].t<<" "<<edge[2][0].c<<endl;

		cin>>m;
		rep(i, m){
			int s, g;
			cin>>s>>g;
			//cout<<s<<" "<<g<<endl;
			dijkstra(s);
			if(d[g].fi==INF) {
				cout<<"NA"<<endl;
				continue;
			}
			ans.clear();
			//bool usedG[1010]={};
			while(1){
				ans.pb(g);
				if(g == s /*|| g == -1*/) break;
				//usedG[g] = true;
				g = d[g].se;
				//if(usedG[g]) break;
				//cout<<"  "<<g<<endl;
			}
			//while(ans.size()> 0 && ans.back()==-1) ans.pop_back();
			reverse(all(ans));
			rep(j, ans.size()){
				if(j != 0) cout<<" ";
				cout<<ans[j];
			}
			cout<<endl;
		}
	}
}

Compiler output:
a.cc: In function 'void dijkstra(int)':
a.cc:78:27: error: no match for 'operator<' (operand types are 'std::pair<int, int>' and 'int')
   78 |                 if(d[from]<p.fi) continue;
      |                    ~~~~~~~^
      |                          |
      |                          std::pair<int, int>
In file included from /usr/include/c++/14/string:48,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:448:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  448 |     operator<(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:448:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  493 |     operator<(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1694 |     operator<(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::move_iterator<_IteratorL>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1760 |     operator<(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::move_iterator<_IteratorL>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/string:51:
/usr/include/c++/14/bits/stl_pair.h:1045:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator<(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1045 |     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1045:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:673:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  673 |     operator< (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:673:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/string_view:680:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  680 |     operator< (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:680:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/string_view:688:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  688 |     operator< (__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:688:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3874:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3874 |     operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3874:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3888:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3888 |     operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3888:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3901:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3901 |     operator<(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3901:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   mismatched types 'const _CharT*' and 'std::pair<int, int>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/string:68:
/usr/include/c++/14/tuple:2600:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator<(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2600 |     operator<(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2600:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::tuple<_UTypes ...>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:6:
/usr/include/c++/14/bits/stl_vector.h:2089:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator<(const vector<_Tp, _Alloc>&, const vector<_Tp, _Alloc>&)'
 2089 |     operator<(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:2089:5: note:   template argument deduction/substitution failed:
a.cc:26:12: note:   'std::pair<int, int>' is not derived from 'const std::vector<_Tp, _Alloc>'
   26 | #define fi first
      |            ^~~~~
a.cc:78:30: note: in expansion of macro 'fi'
   78 |                 if(d[from]<p.fi) continue;
      |                              ^~
In file included from /usr/include/c++/14/deque:66,
                 from /usr/include/c++/14/stack:62,
                 from a.cc:8:
/usr/include/c++/14/bits/stl_deque.h:2334:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator<(const deque<_Tp, _Alloc>&, const d