Submission #1137296

#	Time	Username	Problem	Language	Result	Execution time	Memory
1137296		thunopro	Coins (IOI17_coins)	C++20	25 / 100	5 ms	584 KiB

coins

#include<bits/stdc++.h>
using namespace std ; 
#define maxn 200009
#define ll long long 
#define pb push_back 
#define fi first 
#define se second 
#define left id<<1
#define right id<<1|1 
#define re exit(0); 
#define _lower(x) lower_bound(v.begin(),v.end(),x)-v.begin()+1 
#define TIME ( 1.0*clock() / CLOCKS_PER_SEC )
const int mod = 1e9+7 ;
const int INF = 1e9 ; 

typedef vector<int> vi ; 
typedef pair<int,int> pii ; 
typedef vector<pii> vii ; 

template < typename T > void chkmin ( T &a , T b ) { if ( a > b ) a = b ; } 
template < typename T > void chkmax ( T &a , T b ) { if ( a < b ) a = b ; } 

void add ( int &a , int b ) 
{
	a += b ; 
	if ( a >= mod ) a -= mod ; 
	if ( a < 0 ) a += mod ; 
}

void rf () 
{
	freopen ("bai1.inp","r",stdin) ;
}

mt19937 rng (time(0)) ; 

int _pow ( int a , int n ) 
{
	if ( n == 0 ) return 1 ; 
	int res = _pow (a,n/2) ; 
	if ( n % 2 ) return 1ll*res*res%mod*a%mod ; 
	else return 1ll*res*res%mod ; 
}
vi coin_flips ( vi status , int position ) ; 
int find_coin ( vi status ) ; 

//int main () 
//{
//	ios_base::sync_with_stdio(0); 
//	cin.tie(0);cout.tie(0); 
////	rf () ;
//	vi status ;
//	for ( int i = 0 ; i < 64 ; i ++ ) status . pb (rng()%2) ; 
//	int pos ; cin >> pos ;  
//	vi flip_array = coin_flips (status,pos) ; 
//	for ( auto x : flip_array ) status [x] ^= 1 ; 
//	cout << find_coin(status) ;  
//}

vi coin_flips ( vi status , int position )
{
	vi array_flip ; 
	for ( int i = 0 ; i < 6 ; i ++ ) 
	{
		if ( ( position >> i & 1 ) != status [i] ) array_flip . pb (i) ; 
	}
	if ( array_flip.empty() ) array_flip . pb (63) ; 
	return array_flip ; 
}

int find_coin ( vi status ) 
{
	int res = 0 ; 
	for ( int i = 0 ; i < 6 ; i ++ ) res += status [i] * (1<<i) ; 
	return res ; 
}

Compilation message (stderr)

coins.cpp: In function 'void rf()':
coins.cpp:32:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen ("bai1.inp","r",stdin) ;
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 10 / 10
• Subtask 4: 15 / 15
• Subtask 5: 0 / 50