Submission #722765

#TimeUsernameProblemLanguageResultExecution timeMemory
722765NemanjaSo2005Xor Sort (eJOI20_xorsort)C++14
65 / 100
1086 ms6660 KiB
#include<bits/stdc++.h> #define ll long long using namespace std; ll N,S,niz[1005],pniz[205],niz2[205],MaxO; bool pncmp(int a,int b){ return niz[a]<niz[b]; } struct slog{ int x,y; }pp; struct elem{ bool bit[205]; elem operator ^ (const elem &a){ elem r; for(int i=1;i<=N;i++) r.bit[i]=a.bit[i]^bit[i]; return r; } } sniz[205],zniz[205]; queue<slog> Q; void dodaj(int a,int b){ pp.x=a; pp.y=b; Q.push(pp); } void ispis(){ cout<<Q.size()<<endl; while(Q.size()){ pp=Q.front(); Q.pop(); cout<<pp.x<<" "<<pp.y<<endl; } exit(0); } void uradi(int a,int b){ sniz[a]=sniz[a]^sniz[b]; dodaj(a,b); bool sortiran=true; for(int i=2;i<=N;i++) if(niz[i-1]>=niz[i]) sortiran=false; if(sortiran and Q.size()<=40000) ispis(); } void stavi1(int gde,elem sta){ if(Q.size()>MaxO) return; bool isti=true; for(int i=1;i<=N;i++) if(sniz[gde].bit[i]!=sta.bit[i]) isti=false; if(isti) return; if(sta.bit[gde-1]==sniz[gde].bit[gde-1]) uradi(gde,gde-1); isti=true; for(int i=1;i<=N;i++) if(sniz[gde].bit[i]!=sta.bit[i]) isti=false; if(isti) return; elem pret; for(int i=1;i<gde;i++) pret.bit[i]=sta.bit[i]^sniz[gde].bit[i]; for(int i=gde;i<=N;i++) pret.bit[i]=0; stavi1(gde-1,pret); uradi(gde,gde-1); return; } void stavi2(int gde,elem sta){ if(Q.size()>MaxO) return; bool isti=true; for(int i=1;i<=N;i++) if(sniz[gde].bit[i]!=sta.bit[i]) isti=false; if(isti) return; if(sta.bit[gde+1]==sniz[gde].bit[gde+1]) uradi(gde,gde+1); isti=true; for(int i=1;i<=N;i++) if(sniz[gde].bit[i]!=sta.bit[i]) isti=false; if(isti) return; elem pret; for(int i=gde+1;i<=N;i++) pret.bit[i]=sta.bit[i]^sniz[gde].bit[i]; for(int i=gde;i>=1;i--) pret.bit[i]=0; stavi2(gde+1,pret); uradi(gde,gde+1); return; } void pisibit(){ for(int i=N;i>=1;i--){ for(int j=1;j<=N;j++) cout<<sniz[j].bit[i]<<" "; cout<<endl; } } int main(){ // freopen("Input.txt","r",stdin); cin>>N>>S; for(int i=1;i<=N;i++) cin>>niz[i]; MaxO=40000; if(S==1){ for(int i=1;i<=N;i++) niz2[i]=niz[i]; for(int i=1;i<=N;i++) for(int j=1;j<N;j++) if(niz2[j]>niz2[j+1]){ swap(niz2[j+1],niz2[j]); dodaj(j,j+1); dodaj(j+1,j); dodaj(j,j+1); } if(Q.size()<=MaxO) ispis(); while(Q.size()) Q.pop(); for(int mbit=0;mbit<=N;mbit++){ for(int i=1;i<=N;i++) pniz[i]=i; sort(pniz+1,pniz+1+N,pncmp); for(int i=1;i<=N;i++){ sniz[pniz[i]].bit[i]=1; zniz[i].bit[i]=1; } for(int i=1;i<=N;i++) niz2[pniz[i]]=i; for(int i=1;i<=N;i++) for(int j=i;j<=N;j++){ if(niz2[j]!=i) continue; for(int k=j;k>i;k--){ swap(niz2[k],niz2[k-1]); uradi(k,k-1); uradi(k-1,k); if(i<=mbit) uradi(k,k-1); } break; } pisibit(); for(int i=N;i>=2;i--) stavi1(i,zniz[i]); if(Q.size()<=MaxO) ispis(); while(Q.size()) Q.pop(); } for(int mbit=1;mbit<=N+1;mbit++){ for(int i=1;i<=N;i++) pniz[i]=i; sort(pniz+1,pniz+1+N,pncmp); for(int i=1;i<=N;i++){ sniz[pniz[i]].bit[i]=1; zniz[i].bit[i]=1; } for(int i=1;i<=N;i++) niz2[pniz[i]]=i; for(int i=1;i<=N;i++) for(int j=i;j<=N;j++){ if(niz2[j]!=i) continue; for(int k=j;k>i;k--){ swap(niz2[k],niz2[k-1]); uradi(k,k-1); uradi(k-1,k); if(i>=mbit) uradi(k,k-1); } break; } pisibit(); for(int i=N;i>=2;i--) stavi1(i,zniz[i]); if(Q.size()<=MaxO) ispis(); while(Q.size()) Q.pop(); } /* for(int mbit=0;mbit<=N;mbit++){ for(int i=1;i<=N;i++) pniz[i]=i; sort(pniz+1,pniz+1+N,pncmp); for(int i=1;i<=N;i++){ sniz[pniz[i]].bit[i]=1; zniz[i].bit[i]=1; } for(int i=1;i<=N;i++) niz2[pniz[i]]=i; for(int i=1;i<=N;i++) for(int j=i;j<=N;j++){ if(niz2[j]!=i) continue; for(int k=j;k>i;k--){ swap(niz2[k],niz2[k-1]); uradi(k-1,k); uradi(k,k-1); if(i<=mbit) uradi(k-1,k); } break; } //pisibit(); for(int i=1;i<=N;i++) stavi2(i,zniz[i]); // pisibit(); if(Q.size()<=MaxO) ispis(); } for(int mbit=1;mbit<=N+1;mbit++){ for(int i=1;i<=N;i++) pniz[i]=i; sort(pniz+1,pniz+1+N,pncmp); for(int i=1;i<=N;i++){ sniz[pniz[i]].bit[i]=1; zniz[i].bit[i]=1; } for(int i=1;i<=N;i++) niz2[pniz[i]]=i; for(int i=1;i<=N;i++) for(int j=i;j<=N;j++){ if(niz2[j]!=i) continue; for(int k=j;k>i;k--){ swap(niz2[k],niz2[k-1]); uradi(k-1,k); uradi(k,k-1); if(i>=mbit) uradi(k-1,k); } break; } //pisibit(); for(int i=1;i<=N;i++) stavi2(i,zniz[i]); // pisibit(); if(Q.size()<=MaxO) ispis(); }*/ cout<<"0\n"; return 0; } for(int step=(1<<19);step>=1;step/=2){ bool nemoj=true; for(int i=1;i<=N;i++) if(niz[i]&step) nemoj=false; if(nemoj) continue; for(int i=1;i<N;i++) if((niz[i]&step)>0 and (niz[i+1]&step)==0){ niz[i+1]^=niz[i]; dodaj(i+1,i); } for(int i=1;i<N;i++){ if(niz[i]&step){ niz[i]^=niz[i+1]; dodaj(i,i+1); } } N--; } ispis(); return 0; }

Compilation message (stderr)

xorsort.cpp: In function 'void stavi1(int, elem)':
xorsort.cpp:46:15: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   46 |    if(Q.size()>MaxO)
      |       ~~~~~~~~^~~~~
xorsort.cpp: In function 'void stavi2(int, elem)':
xorsort.cpp:75:15: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   75 |    if(Q.size()>MaxO)
      |       ~~~~~~~~^~~~~
xorsort.cpp: In function 'int main()':
xorsort.cpp:127:18: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  127 |       if(Q.size()<=MaxO)
      |          ~~~~~~~~^~~~~~
xorsort.cpp:158:21: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  158 |          if(Q.size()<=MaxO)
      |             ~~~~~~~~^~~~~~
xorsort.cpp:190:21: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  190 |          if(Q.size()<=MaxO)
      |             ~~~~~~~~^~~~~~
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