oj.uz

Submission #723908

# Submission time Handle Problem Language Result Execution time Memory
723908 2023-04-14T12:38:30 Z NemanjaSo2005 Xor Sort (eJOI20_xorsort) C++14
65 / 100
 1000 ms 9320 KB 
#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);
}
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=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,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 'void stavi1(int, elem)':
xorsort.cpp:40:15: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   40 |    if(Q.size()>MaxO)
      |       ~~~~~~~~^~~~~
xorsort.cpp: In function 'void stavi2(int, elem)':
xorsort.cpp:69:15: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   69 |    if(Q.size()>MaxO)
      |       ~~~~~~~~^~~~~
xorsort.cpp: In function 'int main()':
xorsort.cpp:121:18: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  121 |       if(Q.size()<=MaxO)
      |          ~~~~~~~~^~~~~~
xorsort.cpp:152:21: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  152 |          if(Q.size()<=MaxO)
      |             ~~~~~~~~^~~~~~
xorsort.cpp:184:21: warning: comparison of integer expressions of different signedness: 'std::queue<slog>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  184 |          if(Q.size()<=MaxO)
      |             ~~~~~~~~^~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 3 ms 312 KB Output is correct
4 Correct 20 ms 540 KB Output is correct
5 Correct 23 ms 568 KB Output is correct
6 Correct 21 ms 636 KB Output is correct
7 Correct 23 ms 548 KB Output is correct
8 Correct 21 ms 536 KB Output is correct
9 Correct 24 ms 520 KB Output is correct
10 Correct 26 ms 512 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 45 ms 716 KB Output is correct
13 Correct 46 ms 704 KB Output is correct
14 Correct 42 ms 716 KB Output is correct
15 Correct 45 ms 684 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 3 ms 312 KB Output is correct
4 Correct 20 ms 540 KB Output is correct
5 Correct 23 ms 568 KB Output is correct
6 Correct 21 ms 636 KB Output is correct
7 Correct 23 ms 548 KB Output is correct
8 Correct 21 ms 536 KB Output is correct
9 Correct 24 ms 520 KB Output is correct
10 Correct 26 ms 512 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 45 ms 716 KB Output is correct
13 Correct 46 ms 704 KB Output is correct
14 Correct 42 ms 716 KB Output is correct
15 Correct 45 ms 684 KB Output is correct
16 Correct 1 ms 308 KB Output is correct
17 Correct 30 ms 552 KB Output is correct
18 Correct 41 ms 660 KB Output is correct
19 Correct 39 ms 732 KB Output is correct
20 Correct 37 ms 744 KB Output is correct
21 Correct 50 ms 732 KB Output is correct
22 Correct 61 ms 672 KB Output is correct
23 Correct 44 ms 720 KB Output is correct
24 Correct 37 ms 692 KB Output is correct
25 Correct 39 ms 664 KB Output is correct
26 Execution timed out 1086 ms 9320 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 1 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 54 ms 756 KB Output is correct
6 Correct 41 ms 696 KB Output is correct
7 Correct 39 ms 780 KB Output is correct
8 Correct 38 ms 716 KB Output is correct
9 Correct 51 ms 760 KB Output is correct
10 Correct 54 ms 764 KB Output is correct
11 Correct 40 ms 724 KB Output is correct
12 Correct 44 ms 836 KB Output is correct
13 Correct 41 ms 736 KB Output is correct
14 Correct 42 ms 820 KB Output is correct
15 Correct 52 ms 840 KB Output is correct