Submission #837048

#TimeUsernameProblemLanguageResultExecution timeMemory
837048NemanjaSo2005Matching (CEOI11_mat)C++17
100 / 100
1494 ms65536 KiB
#include<bits/stdc++.h> #define ll long long using namespace std; const int maxn=1e6+5; int MOD=1e9+9,b=1e6+3; int N,K,M,H,H2,kol[maxn],fwt[maxn],niz[maxn],stepen[maxn]; pair<int,int> sniz[maxn]; vector<int> R; void fadd(int gde,int kol){ for(int i=gde;i<=M;i+=i&-i) fwt[i]+=kol; return; } int fget(int gde){ int ret=0; for(int i=gde;i>=1;i-=i&-i) ret+=fwt[i]; return ret; } struct cvor{ int rez,mlt,cur; }c1,c2,st[2100000]; cvor opr(cvor a,cvor b){ a.rez=(a.rez+b.rez+(ll)a.cur*b.mlt)%MOD; a.cur+=b.cur; a.mlt+=b.mlt; if(a.mlt>=MOD) a.mlt-=MOD; return a; } void prop(int gde){ st[gde*2]=opr(st[gde*2],st[gde]); st[gde*2+1]=opr(st[gde*2+1],st[gde]); st[gde].rez=0; st[gde].mlt=0; st[gde].cur=0; } void update(int lg,int dg,cvor sta,int gde=1,int lc=1,int dc=K){ if(lg==lc and dg==dc){ st[gde]=opr(st[gde],sta); return; } prop(gde); int sred=(lc+dc)/2; if(dg<=sred) return update(lg,dg,sta,gde*2,lc,sred); if(lg>sred) return update(lg,dg,sta,gde*2+1,sred+1,dc); update(lg,sred,sta,gde*2,lc,sred); update(sred+1,dg,sta,gde*2+1,sred+1,dc); return; } void add(int l,int r){ if(r<l) return; cvor x; x.mlt=0; x.rez=0; x.cur=1; update(l,r,x); } void multi(int l,int r,int kol){ if(r<l) return; cvor x; x.rez=0; x.cur=0; x.mlt=kol; update(l,r,x); } int main(){ ios_base::sync_with_stdio(false); cin.tie(0); stepen[0]=1; N=1e6; for(int i=1;i<=N;i++) stepen[i]=stepen[i-1]*(ll)b%MOD; cin>>N>>M; K=1; while(K<M) K<<=1; int a; for(int i=1;i<=N;i++){ cin>>a; niz[a]=i; } for(int i=1;i<=N;i++){ fadd(niz[i],1); H=(H+((ll)i-fget(niz[i]))*stepen[i])%MOD; } for(int i=1;i<=M;i++) cin>>niz[i]; for(int i=1;i<=M;i++){ sniz[i].first=niz[i]; sniz[i].second=i; } sort(sniz+1,sniz+1+M); for(int i=1;i<=M;i++) niz[sniz[i].second]=i; memset(fwt,0,sizeof(fwt)); for(int i=1;i<=M;i++){ fadd(niz[i],1); kol[i]=i-fget(niz[i]); } for(int i=M;i>=1;i--){ int p=sniz[i].second; add(p,M); multi(max(1,p-N),p-1,stepen[p]); } for(int i=1;i<K;i++) prop(i); for(int i=1;i<=N;i++) H2=(H2+(ll)kol[i]*stepen[i])%MOD; if(H==H2) R.push_back(1); for(int i=2;i+N-1<=M;i++){ H=(H*(ll)b)%MOD; H2-=kol[i-1]*(ll)stepen[i-1]%MOD; if(H2<0) H2+=MOD; H2+=kol[i+N-1]*(ll)stepen[i+N-1]%MOD; if(H2>=MOD) H2-=MOD; int tmp=H2-st[K+i-2].rez; if(tmp<0) tmp+=MOD; if(tmp==H) 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:131:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |    for(int i=0;i<R.size();i++)
      |                ~^~~~~~~~~
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