Submission #890768

#	Time	Username	Problem	Language	Result	Execution time	Memory
890768		vjudge1	Bitaro's travel (JOI23_travel)	C++17	15 / 100	19 ms	4696 KiB

travel

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;

bool YES(bool f){ if(f) cout << "Yes\n" ; else cout << "No\n" ; return f ; }
void YES(){cout << "Yes\n" ;}
void NO(){cout << "No\n" ;}
void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
//#define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
#define ios ios_base::sync_with_stdio(0) ; cin.tie(0) ; cout.tie(0);
#define int long long
#define all(x) x.begin() , x.end()
#define ld long double
#define pii pair <int , int>
#define ff first
#define ss second
#define endl '\n'

const int N = 2e6 + 5 ;
const int inf = 1e18 ;
const int mod = 1e9 + 7 ;
const double eps = 1e-8 ;

int binpow( int a , int b ){
  if ( b == 0 ) return 1 ;
  int x = binpow ( a , b/2 ) ;
  if ( !(b%2) ) return (x*x) ;
  return (x*x*a) ;
}
template <class T>
bool chmax( T& x , const T& y ){
  bool f = 0 ;
  if ( x < y ) x = y , f = 1 ;
  return f ;
}
template <class T>
bool chmin( T &x , const T &y ){
  bool f = 0 ;
  if ( x > y ) x = y , f = 1 ;
  return f ;
}

//code

int n , m , ans , q ;
int a[N] , b[N] , s[N] ;

void solve(){
	
	cin >> n ;
	for ( int i = 0 ; i < n ; i ++ ) cin >> a[i] ;
	cin >> q ;
	for ( int i = 0 ; i < q ; i ++ ) cin >> b[i] ;
	int l = 0 , r = 0 , cur = b[0] ;
	a[n] = inf ;
	while ( r < n && a[r] < b[0] ) r ++ ;
	l = r-1 ;
	while ( l != -1 || r != n ){
		//cout << cur << ' ' << l << " " << r << endl ;
		if ( l == -1 ){
			ans += a[r]-cur ;
			cur = a[r] ;
			r ++ ;
			continue ;
		}
		if ( r == n ){
			ans += cur-a[l] ;
			cur = a[l] ;
			l -- ;
			continue ;
		}
		if ( a[r]-cur < cur-a[l] ){
			ans += a[r]-cur ;
			cur = a[r] ;
			r ++ ;
			continue ;
		}
		else{
			ans += cur-a[l] ;
			cur = a[l] ;
			l -- ;
			continue ;
		}
	}
	cout << ans ;
	
}

signed main(){
    ios ;
	int t = 1 ;
	//cin >> t ;
	while ( t -- ) solve() ;
}

Compilation message (stderr)

travel.cpp: In function 'void fopn(std::string)':
travel.cpp:10:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
travel.cpp:10:72: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 30
• Subtask 4: 0 / 55