Submission #110258

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
110258	2019-05-10T10:55:42 Z	icandoit	Dreaming (IOI13_dreaming)	C++14	Compilation error	0 ms	0 KB

dreaming

#include "dreaming.h"
#include <bits/stdc++.h>
#define y second
#define x  first
#define ll long long int
#define pb push_back
#define pii pair<int,int> 
using namespace std;
const int N=1e5+7;
vector<pair<int,int> > adj[N];
bool vis[N];
 void dfs(int node,int p,int length,pii &ans){
 	 vis[node]=1;
       for(auto vertice:adj[node]){
          if(vertice.x==p){
          	 continue;
          }
             dfs(vertice.x,node,length+vertice.y,ans);
       }
       if(length>ans.y){
         ans.x=node;
          ans.y=length;
       } 
 }
 bool find(int s,int e,int p,vector<int> &path){
 	  if(s==e){
 	  	  return true;
 	  }
  for(int v:adj[s]){
  	   if(v==p)continue;
  	   if(find(v,e,u,path)){
  	   	    path.push_back(v);
  	   	      return true;
  	   }
  }
    return false;
 }
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	int n=N;
	int m=M;
	int l=L;
	vector<int> radius;
	map<pair<int,int>,int> cost;
	for(int i=0; i<M; i++) {
		int u=A[i];
		int v=B[i];
		int w=T[i];
		adj[u].pb({v,w});
		adj[v].pb({u,w});
		 cost[{u,v}]=cost[{v,u}]=w;
	}
	  for(int i=0;i<n;i++){
         if(vis[i]) continue;
         pii s={-1,-1};
         dfs(i,-1,0,s);
         pii e={-1,-1};
         dfs(s.first,-1,0,e);
         int diameter=e.y;
         vector<int> path;
         find(s.x,e.x,path);
          int sz=(int)path.size();
          int rad=diameter;
           int cur=diameter;
            for(int j=1;j<sz;j++){
            	cur-=cost[{path[j],path[j-1]}];
            	rad=min(rad,max(diameter-cur,cur));
            }
             radius.push_back(rad);
	  }
       int szz=(int)radius.size();
         sort(radius.rbegin(),radius.rend());
     int lol=radius[0];
           if(szz>=2){
           	  lol=max(lol,radius[0]+radius[1]+l);
           }
            if(szz>=3){
            	  lol=max(lol,radius[1]+radius[2]+2*l);
            }

	return lol;
}

Compilation message

dreaming.cpp: In function 'bool find(int, int, int, std::vector<int>&)':
dreaming.cpp:29:18: error: cannot convert 'std::pair<int, int>' to 'int' in initialization
   for(int v:adj[s]){
                  ^
dreaming.cpp:31:19: error: 'u' was not declared in this scope
       if(find(v,e,u,path)){
                   ^
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:40:6: warning: unused variable 'm' [-Wunused-variable]
  int m=M;
      ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from dreaming.cpp:2:
/usr/include/c++/7/bits/stl_algo.h: In instantiation of '_Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = int; _Predicate = __gnu_cxx::__ops::_Iter_equals_val<const std::vector<int> >]':
/usr/include/c++/7/bits/stl_algo.h:3907:28:   required from '_IIter std::find(_IIter, _IIter, const _Tp&) [with _IIter = int; _Tp = std::vector<int>]'
dreaming.cpp:60:27:   required from here
/usr/include/c++/7/bits/stl_algo.h:162:34: error: no matching function for call to '__iterator_category(int&)'
          std::__iterator_category(__first));
          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:65:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from dreaming.cpp:2:
/usr/include/c++/7/bits/stl_iterator_base_types.h:205:5: note: candidate: template<class _Iter> constexpr typename std::iterator_traits<_Iterator>::iterator_category std::__iterator_category(const _Iter&)
     __iterator_category(const _Iter&)
     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/7/bits/stl_iterator_base_types.h:205:5: note:   template argument deduction/substitution failed:
/usr/include/c++/7/bits/stl_iterator_base_types.h: In substitution of 'template<class _Iter> constexpr typename std::iterator_traits<_Iterator>::iterator_category std::__iterator_category(const _Iter&) [with _Iter = int]':
/usr/include/c++/7/bits/stl_algo.h:162:34:   required from '_Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = int; _Predicate = __gnu_cxx::__ops::_Iter_equals_val<const std::vector<int> >]'
/usr/include/c++/7/bits/stl_algo.h:3907:28:   required from '_IIter std::find(_IIter, _IIter, const _Tp&) [with _IIter = int; _Tp = std::vector<int>]'
dreaming.cpp:60:27:   required from here
/usr/include/c++/7/bits/stl_iterator_base_types.h:205:5: error: no type named 'iterator_category' in 'struct std::iterator_traits<int>'