Submission #836876

#	Time	Username	Problem	Language	Result	Execution time	Memory
836876		NemanjaSo2005	Matching (CEOI11_mat)	C++17	0 / 100	273 ms	47292 KiB

mat

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int N,K,M,niz[1000005],oduz[1000005],kol[1000005],H,H2;
int MOD=1000000009,b=1000003,stepen[1000005];
//vector<int> on[1000005],off[1000005];
vector<int> R;
struct slog{
   int sv,poz;
};
slog sniz[3000005];
bool posv(slog a,slog b){
   return a.sv<b.sv;
}
struct cvor{
   int cnt,mlt,rez;
};
cvor st[4200000];
vector<int> fwt;
cvor opr(cvor a,cvor b){
   if(a.rez==-1)
      return b;
   if(b.rez==-1)
      return a;
   a.rez=(a.rez+b.rez+(ll)a.cnt*b.mlt)%MOD;
   a.mlt+=b.mlt;
   if(a.mlt>=MOD)
      a.mlt-=MOD;
   a.cnt+=b.cnt;
   return a;
}
void update(int gde,bool akt){
   if(akt==false){
      st[gde].rez=-1;
   }
   else
      st[gde].rez=0;
   gde/=2;
   while(gde){
      st[gde]=opr(st[gde*2],st[gde*2+1]);
      gde/=2;
   }
}
void fadd(int poz,int kol){
   for(int i=poz;i<=M;i+=i&(-i))
      fwt[i]+=kol;
   return;
}
int fsum(int gde){
   int ret=0;
   for(int i=gde;i>=1;i-=i&(-i))
      ret+=fwt[i];
   return ret;
}
int main(){
   ios_base::sync_with_stdio(false);
   cin.tie(0);
   cin>>N>>M;
   K=1;
   while(K<2*M)
      K<<=1;
 
   /*on.resize(M+5);
   off.resize(M+5);*/
   fwt.resize(M+5);
 
 
   stepen[0]=1;
   for(int i=1;i<=M;i++)
      stepen[i]=(stepen[i-1]*(ll)b)%MOD;
   for(int i=1;i<=N;i++)
      cin>>niz[i];
   for(int i=1;i<=N;i++)
      sniz[niz[i]].sv=i;
   for(int i=1;i<=N;i++)
      niz[i]=sniz[i].sv;
   for(int i=1;i<=N;i++){
      fadd(niz[i],1);
      H=(H+((ll)i-fsum(niz[i]))*stepen[i])%MOD;
   }
 
   for(int i=1;i<=M;i++)
      cin>>niz[i];
   for(int i=1;i<=M;i++){
      sniz[i].poz=i;
      sniz[i].sv=niz[i];
   }
   sort(sniz+1,sniz+1+M,posv);
   for(int i=1;i<=M;i++)
      niz[sniz[i].poz]=i;
   for(int i=1;i<=M;i++)
      fwt[i]=0;
   for(int i=1;i<=M;i++){
      fadd(niz[i],1);
      kol[i]=i-fsum(niz[i]);
   }
   fwt.clear();
   fwt.shrink_to_fit();
   int upok=K;
   for(int i=1;i<=M;i++)
      niz[i]=sniz[i].poz;
 
   for(int i=M;i>=1;i--){
      st[upok].cnt=1;
      st[upok].mlt=0;
      st[upok].rez=-1;
      
      upok++;
 
      st[upok].cnt=0;
      st[upok].mlt=stepen[niz[i]];
      st[upok].rez=-1;
      int l=max(1,niz[i]-N);
      
      upok++;
   }
   for(int i=1;i<=M;i++){
      
      oduz[i]=st[1].rez;
   }
 
   for(int i=1;i<=N;i++)
      H2=(H2+(ll)kol[i]*stepen[i])%MOD;
   if(H2==H)
      R.push_back(1);
   for(int i=2;i+N-1<=M;i++){
      H=(H*(ll)b)%MOD;
      H2-=(ll)kol[i-1]*stepen[i-1]%MOD;
      if(H2<0)
         H2+=MOD;
      H2+=(ll)kol[i+N-1]*stepen[i+N-1]%MOD;
      if(H2>=MOD)
         H2-=MOD;
      int tmp=H2-oduz[i-1];
      if(tmp<0)
         tmp+=MOD;
      if(H==tmp)
         R.push_back(i);
   }
   cout<<R.size()<<"\n";
   for(int i=0;i<R.size();i++)
      cout<<R[i]<<" ";
   cout<<"\n";
   return 0;
}

Compilation message (stderr)

mat.cpp: In function 'int main()':
mat.cpp:113:11: warning: unused variable 'l' [-Wunused-variable]
  113 |       int l=max(1,niz[i]-N);
      |           ^
mat.cpp:141:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  141 |    for(int i=0;i<R.size();i++)
      |                ~^~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 9
• Subtask 5: 0 / 9
• Subtask 6: 0 / 9
• Subtask 7: 0 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 8
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10