Submission #722764

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
722764	2023-04-12T20:08:23 Z	NemanjaSo2005	Xor Sort (eJOI20_xorsort)	C++14	65 / 100	1000 ms	4240 KB

xorsort

#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 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){
   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(){
 //  freopen("Input.txt","r",stdin);
   cin>>N>>S;
   for(int i=1;i<=N;i++)
      cin>>niz[i];
   ll 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

xorsort.cpp: In function 'int main()':
xorsort.cpp:123:18: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  123 |       if(Q.size()<=MaxO)
      |          ~~~~~~~~^~~~~~
xorsort.cpp:154:21: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  154 |          if(Q.size()<=MaxO)
      |             ~~~~~~~~^~~~~~
xorsort.cpp:186:21: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  186 |          if(Q.size()<=MaxO)
      |             ~~~~~~~~^~~~~~

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	212 KB	Output is correct
4	Correct	21 ms	468 KB	Output is correct
5	Correct	23 ms	500 KB	Output is correct
6	Correct	23 ms	520 KB	Output is correct
7	Correct	23 ms	468 KB	Output is correct
8	Correct	22 ms	468 KB	Output is correct
9	Correct	26 ms	628 KB	Output is correct
10	Correct	22 ms	548 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	43 ms	740 KB	Output is correct
13	Correct	44 ms	692 KB	Output is correct
14	Correct	46 ms	756 KB	Output is correct
15	Correct	45 ms	748 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	212 KB	Output is correct
4	Correct	21 ms	468 KB	Output is correct
5	Correct	23 ms	500 KB	Output is correct
6	Correct	23 ms	520 KB	Output is correct
7	Correct	23 ms	468 KB	Output is correct
8	Correct	22 ms	468 KB	Output is correct
9	Correct	26 ms	628 KB	Output is correct
10	Correct	22 ms	548 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	43 ms	740 KB	Output is correct
13	Correct	44 ms	692 KB	Output is correct
14	Correct	46 ms	756 KB	Output is correct
15	Correct	45 ms	748 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	22 ms	484 KB	Output is correct
18	Correct	38 ms	704 KB	Output is correct
19	Correct	39 ms	668 KB	Output is correct
20	Correct	39 ms	732 KB	Output is correct
21	Correct	40 ms	716 KB	Output is correct
22	Correct	39 ms	716 KB	Output is correct
23	Correct	41 ms	668 KB	Output is correct
24	Correct	37 ms	728 KB	Output is correct
25	Correct	39 ms	724 KB	Output is correct
26	Execution timed out	1081 ms	4240 KB	Time limit exceeded
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	0 ms	212 KB	Output is correct
3	Correct	2 ms	212 KB	Output is correct
4	Correct	8 ms	340 KB	Output is correct
5	Correct	41 ms	784 KB	Output is correct
6	Correct	41 ms	704 KB	Output is correct
7	Correct	39 ms	692 KB	Output is correct
8	Correct	45 ms	696 KB	Output is correct
9	Correct	49 ms	732 KB	Output is correct
10	Correct	41 ms	756 KB	Output is correct
11	Correct	40 ms	724 KB	Output is correct
12	Correct	40 ms	800 KB	Output is correct
13	Correct	44 ms	764 KB	Output is correct
14	Correct	45 ms	748 KB	Output is correct
15	Correct	57 ms	968 KB	Output is correct