Submission #934960

#	Time	Username	Problem	Language	Result	Execution time	Memory
934960		thunopro	Super Dango Maker (JOI22_dango3)	C++17	7 / 100	139 ms	604 KiB

dango3

#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
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) ;
}

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 ; 
}

#include "dango3.h" 

int n , m ; 
//int Query ( vi v ) 
//{
//	for ( auto x : v ) cerr << x << " " ; cerr << endl ; 
//	int x ; cin >> x ; return x ; 
//}
//void Answer ( vi v ) 
//{
//	for ( auto x : v ) cerr << x << " " ; cerr << endl ; 
//}

mt19937 rng(23) ; 
void Calc ( vi v ) 
{
	if ( v.empty()) return ; 
	shuffle (v.begin(),v.end(),rng) ; 
	int l = 0 , r = v.size() - 1 , pos ; 
	while ( l <= r ) 
	{
		int mid = (l+r)/2 ; 
		if ( Query(vi(v.begin(),v.begin()+mid+1)) >= 1 ) pos = mid , r = mid-1 ; 
		else l = mid+1 ; 
	}
	vi check = vi (v.begin(),v.begin()+pos+1) ; 
	vi remain = vi (v.begin()+pos+1,v.end()) ; 
	while (check.size() > n) 
	{
		for ( auto x : check ) 
		{
			vi _check ; 
			for ( auto y : check ) 
			{
				if ( x != y ) _check . pb (y) ; 
			}
			if ( Query (_check) == 1 ) 
			{
				remain . pb (x) ; 
				check = _check ; 
				break ; 
			}
		}
	}
	Answer (check) ; 
	Calc (remain) ; 
}
void Solve ( int N , int M ) 
{
	n = N , m = M ; 
	vi v ; 
	for ( int i = 1 ; i <= n*m ; i ++ ) v . pb (i) ; 
	Calc (v) ; 
}
//int main () 
//{
//	ios_base::sync_with_stdio(0); 
//	cin.tie(0);cout.tie(0); 
////	rf () ; 
//	Solve (3,2) ; 
//}

Compilation message (stderr)

dango3.cpp: In function 'void Calc(vi)':
dango3.cpp:69:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   69 |  while (check.size() > n)
      |         ~~~~~~~~~~~~~^~~
dango3.cpp: In function 'void rf()':
dango3.cpp:31:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |  freopen ("bai1.inp","r",stdin) ;
      |  ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
dango3.cpp: In function 'void Calc(vi)':
dango3.cpp:60:33: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   60 |  int l = 0 , r = v.size() - 1 , pos ;
      |                                 ^~~

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 0 / 15
• Subtask 4: 0 / 78