Submission #592223

#	Time	Username	Problem	Language	Result	Execution time	Memory
592223		Deepesson	Towns (IOI15_towns)	C++17	Compilation error	0 ms	0 KiB

towns

#include <bits/stdc++.h>
#define MAX 115
int getDistance(int i, int j);
int hubDistance(int N, int sub);
typedef std::pair<int,int> pii;
int dist[MAX][2];
pii MaisDistante(int N,int x,int p){
    int best=-1,alvo=0;
    for(int i=0;i!=N;++i){
        if(i==x)continue;
        int d = getDistance(i,x);
        if(d>best){
            best=d;
            alvo=i;
        }
        dist[i][p]=d;
    }
    return {best,alvo};
}
int dist_centro[MAX];
///Queries usadas: 3N-3
int hubDistance(int N, int sub) {
	pii alpha = MaisDistante(N,0,1);
	pii beta = MaisDistante(N,alpha.second,0);
	MaisDistante(N,beta.second,1);
	int d = beta.first;
	int ans=1e9;
	int eixo;
	int exp_a,exp_b;
	for(int i=0;i!=N;++i){
        if(i==alpha.second||i==beta.second)continue;
        int a = dist[i][0];
        int b = dist[i][1];
        int soma = a+b;
        int subt = soma-d;
        int base = subt/2;
        int custo = std::max(a,b)-base;
        if(custo<ans){///Fora da sub de A ou B
            eixo=i;
            ans=custo;
            exp_a = a-base;
            exp_b = b-base;
        }
	}
	if(sub<=2)
	return ans;
	std::vector<int> fora;
	int grupos[2]={1,1};
    for(int i=0;i!=N;++i){
        if(i==alpha.second||i==beta.second)continue;
        int a = dist[i][0];
        int b = dist[i][1];
        int soma = a+b;
        int subt = soma-d;
        int base = subt/2;
        int custo = std::max(a,b)-base;
        int dist_a = a-base;
        int dist_b = b-base;
        if(dist_a == exp_a && dist_b == exp_b){///Fora da sub de A ou B
            fora.push_back(i);
            dist_centro[i]=base;
        }else {///Na subarvore de A ou B
            if(a>b)grupos[0]++;else grupos[1]++;
        }
	}
	int lim=N/2;
	if(grupos[0]>lim||grupos[1]>lim)return -ans;
	///Para a sub 4
	if(sub==4){
        int sum = N-(grupos[0]+grupos[1]);
        if(sum>lim)return -ans;
        return ans;
	}
	std::vector<pii> opcoes;
	for(auto&x:base){
        for(int i=0;i!=opcoes.size();++i){
            int p = opcoes[i].first;
            if(getDistance(p,x)==dist_centro[x]+dist_centro[p]){
                ++opcoes[i].second;
                if(opcoes[i].second>lim)return -ans;
                goto safe;
            }
        }
        opcoes.push_back({x,1});
        safe:{}
	}
	return ans;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:56:13: warning: unused variable 'custo' [-Wunused-variable]
   56 |         int custo = std::max(a,b)-base;
      |             ^~~~~
towns.cpp:75:13: error: 'base' was not declared in this scope
   75 |  for(auto&x:base){
      |             ^~~~
towns.cpp:76:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |         for(int i=0;i!=opcoes.size();++i){
      |                     ~^~~~~~~~~~~~~~~
towns.cpp:84:31: error: no matching function for call to 'std::vector<std::pair<int, int> >::push_back(<brace-enclosed initializer list>)'
   84 |         opcoes.push_back({x,1});
      |                               ^
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/functional:62,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from towns.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:1187:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1187 |       push_back(const value_type& __x)
      |       ^~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1187:35: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const value_type&' {aka 'const std::pair<int, int>&'}
 1187 |       push_back(const value_type& __x)
      |                 ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:1203:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1203 |       push_back(value_type&& __x)
      |       ^~~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:1203:30: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::vector<std::pair<int, int> >::value_type&&' {aka 'std::pair<int, int>&&'}
 1203 |       push_back(value_type&& __x)
      |                 ~~~~~~~~~~~~~^~~