Submission #1110341

#	Time	Username	Problem	Language	Result	Execution time	Memory
1110341		Yang8on	Ski 2 (JOI24_ski2)	C++17	0 / 100	3 ms	4688 KiB

Main

#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 ; 
}
 
int n , k ; 
int h [maxn] , c [maxn] ; 
 
ll dp [22][12][1<<11] ; 
 
ll sum_high [1<<11] ; 
int max_high [1<<11] , min_cost [1<<11] ; 
void pre_calc () 
{
	memset (min_cost,0x3f,sizeof min_cost) ; 
	for ( int mask = 0 ; mask < (1<<n) ; mask ++ ) 
	{
		for ( int i = 0 ; i < n ; i ++ ) 
		{
			if ( mask >> i & 1 ) sum_high [mask] += h [i+1] , chkmax(max_high[mask],h[i+1]) , chkmin (min_cost[mask],c[i+1]);
		}
	}
}
int main () 
{
	ios_base::sync_with_stdio(0); 
	cin.tie(0);cout.tie(0); 
	rf () ; 
	cin >> n >> k ; 
	for ( int i = 1 ; i <= n ; i ++ ) cin >> h [i] >> c [i] , h [i] ++ ; 
	
	memset (dp,0x3f,sizeof dp) ; 
	pre_calc  () ; 
	
	dp [0][0][0] = 0 ; 
	const int HIGH = n+*max_element(h+1,h+n+1) ; 
 
	for ( int i = 0 ; i < HIGH ; i ++ ) 
	{
		for ( int j = 0 ; j < n ; j ++ ) 
		{
			for ( int mask = 0 ; mask < (1<<n) ; mask ++ ) 
			{
				chkmin (dp[i+1][j][mask],dp[i][j][mask]) ; 
				int nmask = (1<<n) - 1 - mask ; 
				for ( int submask = nmask ; submask > 0 ; submask = (submask-1)&nmask ) 
				{
					if ( max_high [submask] <= i+1 && ( __builtin_popcount (submask) <= j || mask == 0 )) 
					{
						int add_j = 0 ; 
						if ( mask == 0 && __builtin_popcount(submask) > 1 ) continue ;
						if ( mask == 0 && __builtin_popcount(submask) == 1 ) add_j = 1 ;  
						chkmin (dp[i+1][j+add_j][mask|submask],dp[i][j][mask]+1ll*(__builtin_popcount (submask)*(i+1)-sum_high[submask])*k) ; 
					}
				}
			}
			for ( int mask = 0 ; mask < (1<<n) ; mask ++ ) 
			{
				for ( int add_j = 0 ; add_j + j < n ; add_j ++ ) chkmin (dp[i+1][j+add_j][mask],dp[i+1][j][mask]+1ll*min_cost[mask]*add_j) ; 
			}
		}
	}
	
	if ( n == 1 ) 
	{
		cout << 0 ; re 
	}
	ll res = 1e18 ; 
	for ( int j = 0 ; j < n ; j ++ ) chkmin (res,dp[HIGH-1][j][(1<<n)-1]) ;  
	
	cout << res ; 
}

Compilation message (stderr)

Main.cpp: In function 'void rf()':
Main.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) ;
      |  ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 12
• Subtask 3: 0 / 9
• Subtask 4: 0 / 33
• Subtask 5: 0 / 27
• Subtask 6: 0 / 14