Submission #892843

#	Time	Username	Problem	Language	Result	Execution time	Memory
892843		thunopro	Food Court (JOI21_foodcourt)	C++14	7 / 100	125 ms	148564 KiB

foodcourt

#include<bits/stdc++.h>
using namespace std ;
#define maxn 200009 
#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); 

const int mod = 1e9+7 ; 
const int INF = 1e9 ; 
const int LOG = 18 ; 

typedef vector<int> vi ; 
typedef vector<ll> vl ; 
typedef pair<int,int> pii ; 
typedef vector<pii> vii ; 
typedef pair<ll,ll> pll ;  

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

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 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 , m , nq ; 

struct shape {
	int op , l , r , c , k ; 
	int pos ; 
	ll b ; 
} q [maxn] ;

deque <pll> deq [maxn] ; 
void sub1 () 
{
	for ( int run = 1 ; run <= nq ; run ++ ) 
	{
		int op = q [run].op ; 
		if ( op <= 2 ) 
		{
			int l = q [run].l , r = q [run].r , c = q [run].c , k = q [run].k ; 
			if ( op == 1 ) 
			{
				for ( int i = l ; i <= r ; i ++ ) 
				{
					if ( deq[i].empty() || deq[i].back().fi != c ) deq[i] . push_back ({c,k}) ; 
					else deq[i].back().se += k ; 
				}
			}
			else 
			{
				for ( int i = l ; i <= r ; i ++ ) 
				{
					int remain = k ; 
					while ( deq[i].size () ) 
					{
						if ( deq[i].front().se <= remain ) remain -= deq[i].front().se , deq[i].pop_front () ; 
						else 
						{
							deq[i].front().se -= remain ; 
							break ; 
						}
					}
				}
			}
		}
		else 
		{
			int pos = q[run].pos ; 
			ll b = q [run].b ; 
			deque <pll> New = deq [pos] ; 
			ll sum = 0 ; 
			
			int res = 0 ; 
			
			while ( !New.empty() ) 
			{
				if ( sum + New.front().se >= b )
				{
					res = New.front().fi ; 
					break ; 
				}
				sum += New.front().se ; 
				New.pop_front() ; 
			}
			
			cout << res << "\n" ; 
		}
	}
}
int main () 
{
	ios_base::sync_with_stdio(0) ; 
	cin.tie(0) ; cout.tie(0) ; 
//	rf () ; 
	cin >> n >> m >> nq ; 
	for ( int i = 1 ; i <= nq ; i ++ ) 
	{
		cin >> q[i].op ; 
		if ( q[i].op == 1 ) 
		{
			cin >> q[i].l >> q[i].r >> q[i].c >> q[i].k ; 
		}
		else if ( q[i].op == 2 ) 
		{
			cin >> q[i].l >> q[i].r >> q [i].k ; 
		}
		else cin >> q[i].pos >> q[i].b ; 
	}
	
	if ( n <= 2e3 && nq <= 2e3 ) sub1 () ; 
}

Compilation message (stderr)

foodcourt.cpp: In function 'void rf()':
foodcourt.cpp:34:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  freopen ("bai1.inp","r",stdin) ;
      |  ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 0 / 7
• Subtask 4: 0 / 21
• Subtask 5: 0 / 15
• Subtask 6: 0 / 13
• Subtask 7: 0 / 26
• Subtask 8: 0 / 11