Submission #738340

#	Time	Username	Problem	Language	Result	Execution time	Memory
738340		billyisme	Matching (CEOI11_mat)	C++11	0 / 100	271 ms	65536 KiB

mat

#define TASK "text"
#define INPUT TASK".INP" 
#define OUTPUT TASK".OUT"
#include<bits/stdc++.h>
using namespace std; 
bool multitest = false; 
#define int long long 
#define ll long long 
#define db double 
#define pii pair<int,int> 
#define pll pair<ll,ll>
#define vi vector<int>
#define vll vector<ll> 
#define ve vector 
#define str string 
#define pb push_back 
#define pk pop_back 
#define el '\n'
#define mp make_pair 
#define fi first 
#define se second  
#define tct template<typename T>
#define FOR(i,a,b) for(int i=(int)(a);i<=(int)(b);i++)
#define FORD(i,a,b) for(int i=(int)(a);i>=(int)(b);i--)
#define FORN(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(a) a.begin(),a.end() 
#define btpc(a) __builtin_popcount(a)  
ll lg(ll a){return __lg(a);}
ll sq(ll a){return a*a;}  
ll gcd(ll a , ll b){return __gcd(a,b);} 
ll lcm(ll a,  ll b){return a/gcd(a,b)*b;}
tct bool mini(T& a,const T& b){return (a>b)?a=b,1:0;}
tct bool maxi(T& a,const T& b){return (a<b)?a=b,1:0;}
tct void prt(T a[] ,int n ){FOR(i,1,n)cout<<a[i]<<" ";cout<<el;}
int xx[] = {0,0,-1,0,1}; 
int yy[] = {0,-1,0,1,0};

const int N = 1e6+5, oo = 2e9, LO = 17; 
const ll inf = 1e17, cs = 330, sm = 1e9+7; 
const db PI = acos(-1), EPS = 1e-9;

int n , m ; 
pii b[N] ; 
pii a[N] ; 
ll Hash_of_b = 0 ; 

vi value ; 
unordered_map<int,int>pos ; 

vi res; 
ll mu[N] ;
struct Node
{
	ll hash ; 
	int sl ; 
} ; 
Node st[4*N] ; 
ll sum = 0; 
bool cmp(pii A , pii B)
{
	return A.se<B.se ;
}
Node merge(Node L , Node R)
{
	ll hash = (L.hash*mu[R.sl]%sm+R.hash)%sm ; 
	int sl = L.sl+R.sl ; 
	return {hash,sl} ; 
}
void update(int id, int l ,int r ,int pos,int val , int sl )
{
	if(l==r&&l==pos)
	{
		st[id] = {val,sl} ; 
		return ; 
	}
	if(r<pos||pos<l)return ; 
	int mid=(l+r)/2; 
	update(id*2,l,mid,pos,val,sl) ; 
	update(id*2+1,mid+1,r,pos,val,sl) ; 
	st[id] =merge(st[id*2],st[id*2+1]) ; 
}
void doc()
{
	cin>> m >> n ; 
	FOR(i,1,m)cin>>b[i].fi,b[i].se=i; 
	FOR(i,1,n)cin>>a[i].fi,a[i].se=i ; 
}       	
void xuly()
{	
	mu[0] = 1; 
	FOR(i,1,n)mu[i] = mu[i-1]*cs%sm ; 
	
	sort(b+1,b+m+1) ; 
	FOR(i,1,m)Hash_of_b=(Hash_of_b*cs+b[i].se)%sm,sum=(sum+mu[i-1])%sm;

	sort(a+1,a+n+1) ; 
	FOR(i,1,n)pos[a[i].se]=i ; 
	FOR(i,1,m)update(1,1,n,pos[i],i,1);
	FOR(i,m,n)
	{
		ll d = (st[1].hash-1LL*(i-m)*sum%sm+sm)%sm;
		if(d==Hash_of_b)res.pb(i-m+1) ; 
		update(1,1,n,pos[i-m+1],0,0) ;
		update(1,1,n,pos[i+1],i+1,1) ; 
	}			
	cout<<res.size()<<el; 
	for(auto x:res)cout<<x<<" ";
}

signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); 
    if(fopen(INPUT,"r"))
    {
        freopen(INPUT ,"r",stdin);
        freopen(OUTPUT,"w",stdout);
    }
    int test =1;
    if(multitest)cin>>test;
    FOR(i,1,test)
    {
        doc() ; 
        xuly() ; 
    }
    cerr<<el<<"Time: "<<clock()<<"ms"<<el;
}

Compilation message (stderr)

mat.cpp: In function 'int main()':
mat.cpp:115:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |         freopen(INPUT ,"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~
mat.cpp:116:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |         freopen(OUTPUT,"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~

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• Subtask 11: 0 / 10