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Submission #887454

# Submission time Handle Problem Language Result Execution time Memory
887454 2023-12-14T14:48:56 Z djs100201 Longest Trip (IOI23_longesttrip) C++17
Compilation error
 0 ms 0 KB 
#include "longesttrip.h"
#include<random>
#include<bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#define all(v) v.begin(),v.end()
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
using PP = pair<ll, P>;
const ll n_ = 1e5 + 505, inf = (ll)2e9 * (ll)1e9 + 7, mod = 998244353;
ll n, m, tc = 1, a, b, c, d, sum, x, y, z, base, ans, k;
 
mt19937_64 seed(20010223);
vector<int> longest_trip(int N,int D){
	vector<int>ret;
	n=N;
	if(D==3){
		for(int i=0;i<n;i++)ret.push_back(i);
	}
	else if(D==2){
		vector<int>A={0},B={1},C={2};
		deque<ll>T;
		if(are_connected(A,B)){
			T.push_back(0);
			T.push_back(1);
			for(int i=2;i<n;i++){
				A.clear(),B.clear(),C.clear();
				A.push_back(T.front());
				C.push_back(i);
				if(are_connected(A,C))T.push_front(i);
				else T.push_back(i);
			}
		}
		else if(are_connected(B,C)){
			T.push_back(1);
			T.push_back(2);
			for(int i=0;i<n;i++){
				if(i==1 || i==2)continue;
				A.clear(),B.clear(),C.clear();
				A.push_back(T.front());
				C.push_back(i);
				if(are_connected(A,C))T.push_front(i);
				else T.push_back(i);
			}
		}
		else if(are_connected(A,C)){
			T.push_back(0);
			T.push_back(2);
			for(int i=0;i<n;i++){
				if(i==0 || i==2)continue;
				A.clear(),B.clear(),C.clear();
				A.push_back(T.front());
				C.push_back(i);
				if(are_connected(A,C))T.push_front(i);
				else T.push_back(i);
			}
		}
		while(T.size())ret.push_back(T.back()),T.pop_back();
	}
	else{
		vector<vector<ll>>S;
		vector<int>id(n);
		for(int i=0;i<n;i++)id[i]=i;
		uniform_real_distribution<int>R(0,n-1);
		random_device rd;
		mt19937 gen(rd());
		for(int i=0;i<100000;i++){
			a=R(gen);
			b=R(gen);
			swap(id[a],id[b]);
		}
		S.push_back({0});
		for(int i=1;i<n;i++){
			a=S.back().back();
			if(are_connected({a},{i}))S.back().push_back(i);
			else{
				if(S.size()>=2 && S.back().size()==1)S[S.size()-2].push_back(i);
				else S.push_back({i});
			}
		}
		if(S.size()==1){
			for(auto nxt:S[0])ret.push_back(nxt);
		}
		else {
			vector<ll>A,B;
			A=S[0],B=S[1];
			for(int i=2;i<n;i++){
				vector<ll>T=S[i];
				if(are_connected({A.back()},{T[0]})){
					for(auto nxt:T)A.push_back(nxt);
				}
				else if(are_connected({B.back()},{T[0]})){
					for(auto nxt:T)B.push_back(nxt);
				}
				else{
					reverse(all(B));
					for(auto nxt:B)A.push_back(nxt);
					B=T;
				}
			}
			if(A.size()<B.size())swap(A,B);
			return A;
		}
	}
	return ret;
}

Compilation message

In file included from /usr/include/c++/10/random:49,
                 from longesttrip.cpp:2:
/usr/include/c++/10/bits/random.h: In instantiation of 'class std::uniform_real_distribution<int>':
longesttrip.cpp:65:34:   required from here
/usr/include/c++/10/bits/random.h:1733:56: error: static assertion failed: result_type must be a floating point type
 1733 |       static_assert(std::is_floating_point<_RealType>::value,
      |                                                        ^~~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:76:22: warning: narrowing conversion of 'a' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing]
   76 |    if(are_connected({a},{i}))S.back().push_back(i);
      |                      ^
longesttrip.cpp:76:22: warning: narrowing conversion of 'a' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing]
longesttrip.cpp:90:29: warning: narrowing conversion of 'A.std::vector<long long int>::back()' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
   90 |     if(are_connected({A.back()},{T[0]})){
      |                       ~~~~~~^~
longesttrip.cpp:90:29: warning: narrowing conversion of 'A.std::vector<long long int>::back()' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
longesttrip.cpp:90:39: warning: narrowing conversion of 'T.std::vector<long long int>::operator[](0)' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
   90 |     if(are_connected({A.back()},{T[0]})){
      |                                       ^
longesttrip.cpp:90:39: warning: narrowing conversion of 'T.std::vector<long long int>::operator[](0)' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
longesttrip.cpp:93:34: warning: narrowing conversion of 'B.std::vector<long long int>::back()' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
   93 |     else if(are_connected({B.back()},{T[0]})){
      |                            ~~~~~~^~
longesttrip.cpp:93:34: warning: narrowing conversion of 'B.std::vector<long long int>::back()' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
longesttrip.cpp:93:44: warning: narrowing conversion of 'T.std::vector<long long int>::operator[](0)' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
   93 |     else if(are_connected({B.back()},{T[0]})){
      |                                            ^
longesttrip.cpp:93:44: warning: narrowing conversion of 'T.std::vector<long long int>::operator[](0)' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
longesttrip.cpp:103:11: error: could not convert 'A' from 'vector<long long int>' to 'vector<int>'
  103 |    return A;
      |           ^
      |           |
      |           vector<long long int>
In file included from /usr/include/c++/10/random:49,
                 from longesttrip.cpp:2:
/usr/include/c++/10/bits/random.h: In instantiation of 'struct std::__detail::_Adaptor<std::mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>, int>':
/usr/include/c++/10/bits/random.h:1858:6:   required from 'std::uniform_real_distribution<_RealType>::result_type std::uniform_real_distribution<_RealType>::operator()(_UniformRandomNumberGenerator&, const std::uniform_real_distribution<_RealType>::param_type&) [with _UniformRandomNumberGenerator = std::mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>; _RealType = int; std::uniform_real_distribution<_RealType>::result_type = int]'
/usr/include/c++/10/bits/random.h:1850:34:   required from 'std::uniform_real_distribution<_RealType>::result_type std::uniform_real_distribution<_RealType>::operator()(_UniformRandomNumberGenerator&) [with _UniformRandomNumberGenerator = std::mersenne_twister_engine<long unsigned int, 32, 624, 397, 31, 2567483615, 11, 4294967295, 7, 2636928640, 15, 4022730752, 18, 1812433253>; _RealType = int; std::uniform_real_distribution<_RealType>::result_type = int]'
longesttrip.cpp:69:11:   required from here
/usr/include/c++/10/bits/random.h:158:53: error: static assertion failed: template argument must be a floating point type
  158 |  static_assert(std::is_floating_point<_DInputType>::value,
      |                                                     ^~~~~