Submission #945472

#	Time	Username	Problem	Language	Result	Execution time	Memory
945472		thunopro	Password (RMI18_password)	C++14	0 / 100	273 ms	696 KiB

password

#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 ; 
}
int cnt [26] ; 

extern int query ( string s ) ; 
string dc ( int l , int r ) 
{
	if ( l == r ) 
	{
		string res (cnt[l],'a'+l) ; 
		return res ; 
	}
	int mid = (l+r)/2 ; 
	string left = dc (l,mid) , right = dc (mid+1,r) ; 
	if ( left.size () == 0 ) return right ; 
	if ( right.size () == 0 ) return left ; 
	string res = "" ; 
	int i = 0 , j = 0 ; 
	while ( i<left.size() && j<right.size() ) 
	{
		int len = query (res+left[i]+right.substr(j)) ; 
		int base = res.size () + right.size() - j ;
		if ( len > base ) res += left [i++] ; 
		else res += right [j++] ; 
	}
	if ( i < left.size () ) res += left.substr (i) ; 
	else res += right.substr (j) ; 
	
	return res ; 
}
string guess ( int n , int s ) 
{
	for ( int i = 0 ; i < s ; i ++ ) 
	{
		string str (n,'a'+i) ; 
		cnt [i] = query (str) ; 
	}
	dc (0,s-1) ; 
}
//int main () 
//{
//	ios_base::sync_with_stdio(0); 
//	cin.tie(0);cout.tie(0); 
////	rf () ;
//}

Compilation message (stderr)

password.cpp: In function 'std::string dc(int, int)':
password.cpp:60:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |  while ( i<left.size() && j<right.size() )
      |          ~^~~~~~~~~~~~
password.cpp:60:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |  while ( i<left.size() && j<right.size() )
      |                           ~^~~~~~~~~~~~~
password.cpp:67:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |  if ( i < left.size () ) res += left.substr (i) ;
      |       ~~^~~~~~~~~~~~~~
password.cpp: In function 'std::string guess(int, int)':
password.cpp:80:1: warning: no return statement in function returning non-void [-Wreturn-type]
   80 | }
      | ^
password.cpp: In function 'void rf()':
password.cpp:32:10: 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 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20