oj.uz

Submission #718046

# Submission time Handle Problem Language Result Execution time Memory
718046 2023-04-03T08:35:38 Z NemanjaSo2005 Xor Sort (eJOI20_xorsort) C++14
65 / 100
 126 ms 1616 KB 
#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll N,S,niz[1005],pniz[205],niz2[205];
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 uradi(int a,int b){
   sniz[a]=sniz[a]^sniz[b];
   dodaj(a,b);
}
void ispis(){
   cout<<Q.size()<<endl;
   while(Q.size()){
      pp=Q.front();
      Q.pop();
      cout<<pp.x<<" "<<pp.y<<endl;
   }
   exit(0);
}
void stavi1(int gde,elem sta){
   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){
   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(){
   cin>>N>>S;
   for(int i=1;i<=N;i++)
      cin>>niz[i];
   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()<=40000)
         ispis();
      while(Q.size())
         Q.pop();

      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);
            }
            break;
         }
      for(int i=N;i>=2;i--)
         stavi1(i,zniz[i]);

      if(Q.size()<=40000)
         ispis();
      while(Q.size())
         Q.pop();


      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);
            }
            break;
         }

      //pisibit();

      for(int i=1;i<=N;i++)
         stavi2(i,zniz[i]);

     // pisibit();
      ispis();
      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;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 19 ms 488 KB Output is correct
5 Correct 30 ms 516 KB Output is correct
6 Correct 24 ms 476 KB Output is correct
7 Correct 23 ms 468 KB Output is correct
8 Correct 22 ms 528 KB Output is correct
9 Correct 24 ms 552 KB Output is correct
10 Correct 23 ms 524 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 45 ms 840 KB Output is correct
13 Correct 51 ms 716 KB Output is correct
14 Correct 45 ms 788 KB Output is correct
15 Correct 42 ms 752 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 19 ms 488 KB Output is correct
5 Correct 30 ms 516 KB Output is correct
6 Correct 24 ms 476 KB Output is correct
7 Correct 23 ms 468 KB Output is correct
8 Correct 22 ms 528 KB Output is correct
9 Correct 24 ms 552 KB Output is correct
10 Correct 23 ms 524 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 45 ms 840 KB Output is correct
13 Correct 51 ms 716 KB Output is correct
14 Correct 45 ms 788 KB Output is correct
15 Correct 42 ms 752 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 23 ms 500 KB Output is correct
18 Correct 46 ms 728 KB Output is correct
19 Correct 39 ms 700 KB Output is correct
20 Correct 38 ms 628 KB Output is correct
21 Correct 41 ms 684 KB Output is correct
22 Correct 42 ms 684 KB Output is correct
23 Correct 39 ms 780 KB Output is correct
24 Correct 42 ms 752 KB Output is correct
25 Correct 37 ms 724 KB Output is correct
26 Incorrect 126 ms 1616 KB Integer 79505 violates the range [0, 40000]
27 Halted 0 ms 0 KB -

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 212 KB Output is correct
4 Correct 9 ms 392 KB Output is correct
5 Correct 40 ms 800 KB Output is correct
6 Correct 40 ms 684 KB Output is correct
7 Correct 40 ms 764 KB Output is correct
8 Correct 42 ms 776 KB Output is correct
9 Correct 44 ms 768 KB Output is correct
10 Correct 39 ms 772 KB Output is correct
11 Correct 40 ms 772 KB Output is correct
12 Correct 42 ms 792 KB Output is correct
13 Correct 44 ms 752 KB Output is correct
14 Correct 47 ms 780 KB Output is correct
15 Correct 52 ms 932 KB Output is correct