Submission #856798

#	Time	Username	Problem	Language	Result	Execution time	Memory
856798		Trisanu_Das	Valley (BOI19_valley)	C++17	Compilation error	0 ms	0 KiB

valley

#include <bits/stdc++.h>
using namespace std;
#define pi pair<int, int>
#define ll long long
#define ff first
#define ss second
 
ll n, s, q, e, a, b, w, z, r, c[100005];
vector<pi> adj[100005];
pi rs[100005];
	
ll dfs(ll u, ll p){
	ll ans = LLONG_MAX / 3;
	if(u == e) return -1;
	for(auto v : adj[u]){
		if(v.ff == rs[z].ff && u == rs[z].ss) continue;
		if(v.ff == rs[z].ss && u == rs[z].ff) continue;
		if(v.ff != p){
			ll res = dfs(v.ff, u);
			if(res == -1) return -1;
			ans = min(ans, res + v.ss);
		}
	}
	if(c[u]) return 0;
	return ans;
}
 
int main(){
	cin >> n >> s >> q >> e;
	for(ll i = 0; i < n-1; i++){
		cin >> u >> v >> w;
		adj[u].push_back({v, w});
		adj[v].push_back({u, w});
		rs[i] = {u, v};
	}
	for(ll i = 0; i < s; i++){ cin >> z; c[z] = 1; }
	for(ll i = 0; i < q; i++){
		cin >> z >> r; z--;
		ll ans = dfs(r, -1);
		if(ans == -1) cout << "escaped\n";
		else if(ans >= LLONG_MAX / 3) cout << "oo\n";
		else cout << ans << '\n';
	}
}

Compilation message (stderr)

valley.cpp: In function 'int main()':
valley.cpp:31:10: error: 'u' was not declared in this scope
   31 |   cin >> u >> v >> w;
      |          ^
valley.cpp:31:15: error: 'v' was not declared in this scope
   31 |   cin >> u >> v >> w;
      |               ^
valley.cpp:34:16: error: no match for 'operator=' (operand types are 'std::pair<int, int>' and '<brace-enclosed initializer list>')
   34 |   rs[i] = {u, v};
      |                ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from valley.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:390:7: note: candidate: 'std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_copy_assignable<_T1>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__nonesuch&>::type) [with _T1 = int; _T2 = int; typename std::conditional<std::__and_<std::is_copy_assignable<_T1>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__nonesuch&>::type = const std::pair<int, int>&]'
  390 |       operator=(typename conditional<
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:393:41: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::conditional<true, const std::pair<int, int>&, const std::__nonesuch&>::type' {aka 'const std::pair<int, int>&'}
  390 |       operator=(typename conditional<
      |                 ~~~~~~~~~~~~~~~~~~~~~    
  391 |   __and_<is_copy_assignable<_T1>,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~        
  392 |          is_copy_assignable<_T2>>::value,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  393 |   const pair&, const __nonesuch&>::type __p)
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_pair.h:401:7: note: candidate: 'std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__nonesuch&&>::type) [with _T1 = int; _T2 = int; typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__nonesuch&&>::type = std::pair<int, int>&&]'
  401 |       operator=(typename conditional<
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:404:31: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::conditional<true, std::pair<int, int>&&, std::__nonesuch&&>::type' {aka 'std::pair<int, int>&&'}
  401 |       operator=(typename conditional<
      |                 ~~~~~~~~~~~~~~~~~~~~~
  402 |   __and_<is_move_assignable<_T1>,
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  403 |          is_move_assignable<_T2>>::value,
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  404 |   pair&&, __nonesuch&&>::type __p)
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_pair.h:418:2: note: candidate: 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, const _U1&>, std::is_assignable<_T2&, const _U2&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(const std::pair<_U1, _U2>&) [with _U1 = _U1; _U2 = _U2; _T1 = int; _T2 = int]'
  418 |  operator=(const pair<_U1, _U2>& __p)
      |  ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:418:2: note:   template argument deduction/substitution failed:
valley.cpp:34:16: note:   couldn't deduce template parameter '_U1'
   34 |   rs[i] = {u, v};
      |                ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from valley.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:430:2: note: candidate: 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, _U1&&>, std::is_assignable<_T2&, _U2&&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(std::pair<_U1, _U2>&&) [with _U1 = _U1; _U2 = _U2; _T1 = int; _T2 = int]'
  430 |  operator=(pair<_U1, _U2>&& __p)
      |  ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:430:2: note:   template argument deduction/substitution failed:
valley.cpp:34:16: note:   couldn't deduce template parameter '_U1'
   34 |   rs[i] = {u, v};
      |                ^