제출 #891666

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
891666		thunopro	Sprinkler (JOI22_sprinkler)	C++14	12 / 100	668 ms	205708 KiB

sprinkler

#include<bits/stdc++.h>
using namespace std ; 
#define maxn 400009 
#define ll long long 
#define fi first 
#define se second 
#define pb push_back 
#define left id<<1 
#define right id<<1|1
#define re exit(0);
#define _lower(v,x) lower_bound(v.begin(),v.end(),x)-v.begin()+1
 
int mod = 1e9+7 ; 
const int INF = 1e9 ;
const int LOG = 18 ; 
 
typedef vector<int> vi ; 
typedef pair<int,int> pii ; 
typedef vector<pii> vii ;
typedef vector<ll> vl ;  
typedef pair<ll,ll> pll ; 
typedef vector<pll> vll ; 
 
void add ( int&a , int b ) { if ((a+=b) > mod ) a -= mod ; } 
void sub ( int&a , int b ) { if ((a-=b) < 0 ) a += mod ; } 
template<typename T> void chkmin(T& x, T y) {if(x > y) x = y;}
template<typename T> void chkmax(T& x, T y) {if(x < y) x = y;}
 
void rf ( ) 
{
	freopen ("bai1.inp","r",stdin) ; 
//	freopen ("bai1.out","w",stdout) ;
}
 
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 ;
 
vi adjList [maxn] ;
int a [maxn] ; 
 
int nq ; 
struct shape {
	int op , x , d , w ; 
} q [maxn] ; 
 
bool vis [maxn] ; 
void update_near ( int u , int d , int w , int par = -1 ) 
{
	a [u] = 1ll*a[u]*w%mod ; 
	if ( d == 0 ) return ; 
	for ( auto v : adjList [u] ) 
	{
		if ( v != par ) update_near (v,d-1,w,u) ; 
	}
}
void sub1 () 
{
	for ( int rn = 1 ; rn <= nq ; rn ++ ) 
	{
		if ( q[rn].op == 1 ) 
		{
			int x = q [rn].x , d = q [rn].d , w = q [rn].w ; 
			update_near (x,d,w) ; 
		}
		else cout << a [q[rn].x] << "\n" ;  
	}
}
 
bool check_sub2 () 
{
	for ( int i = 1 ; i <= nq ; i ++ ) 
	{
		if ( q [i].op == 1 && q [i].d >= 2 ) return false ; 
	}
	return true ; 
}
 
 
vi vertex_special ; 
int speical [maxn] ;
int lazy_val [maxn] ; 
 
void sub2 () 
{
	map <int,bool> adj [n+5] ; 
	for ( int i = 1 ; i <= n ; i ++ ) lazy_val [i] = 1 ; 
	for ( int i = 1 ; i <= n ; i ++ ) 
	{
		if ( adjList [i].size () > 400 ) speical [i] = true , vertex_special . pb (i) ; 
		for ( auto x : adjList [i] ) adj [x][i] = adj [i][x] = true ; 
	}
	for ( int rn = 1 ; rn <= nq ; rn ++ ) 
	{
		if ( q[rn].op == 1 ) 
		{
			int x = q [rn].x , d = q [rn].d , w = q [rn].w ; 
			if ( d == 0 ) 
			{
				a [x] = 1ll*a[x]*w%mod ; 
				continue ; 
			}
			if ( speical [x] == false ) update_near (x,d,w) ;
			else lazy_val [x] = 1ll*lazy_val[x]*w%mod ; 	
		}
		else 
		{
			int x = q [rn].x ; 
			int res = 1ll*a [x]*lazy_val[x]%mod ; 
			for ( auto v : vertex_special ) 
			{
				if ( adj [x][v] ) res = 1ll*res*lazy_val[v]%mod ; 
			}
			cout << res << "\n" ; 
		}
	}
}
int main ( ) 
{
	ios_base :: sync_with_stdio (0) ; 
	cin.tie(0) ; cout.tie(0) ;
//	rf () ; 
	cin >> n >> mod ; 
	for ( int i = 1 ; i < n ; i ++ ) 
	{
		int u , v ; cin >> u >> v ; 
		adjList [u] . pb (v) ; 
		adjList [v] . pb (u) ; 
	}
	
	for ( int i = 1 ; i <= n ; i ++ ) cin >> a [i] ; 
	
	cin >> nq ; 
	for ( int i = 1 ; i <= nq ; i ++ ) 
	{
		cin >> q [i].op ; 
		if ( q[i].op == 1 ) 
		{
			cin >> q[i].x >> q[i].d >> q[i].w ; 
		}
		else cin >> q[i].x ; 
	}
 
	if ( n <= 1000 && nq <= 1000 ) sub1 () ; 
	else if ( check_sub2 () ) sub2 () ; 
}
 
 
 
 
//-std=c++11

컴파일 시 표준 에러 (stderr) 메시지

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

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